THERE'S ONE MORE COMPANY! I was head development technician for a British company called Wilksch Airmotive, who also designed and produced various aircraft Diesel engines. Our engines were 2-stroke, Aluminium construction, with supercharger integrated to the block, turbocharged, and had overhead camshaft for exhaust, 2 valves per cylinder. They were available in inverted inline 3 or 4 cyclinder variants, with up to 50KW per cyclinder, and we were able to reach 240g/KWH fuel efficiency with a totally mechanical, indirect, non-common rail fuel system. All this and it would run on any fuel similar to diesel (even recycled plastic) and a 1000hr TBO. The 4 cylinder engine I tested before leaving the company was producing 200KW (about 270hp) at 2750rpm, and burning less than 12gal/hr of diesel. The company still exists, but I don't think they're selling new units anymore.
Notice a complete lack of black smoke? Black smoke is a sign of too much fuel and too little air, not to mention small testicles. These units adopted diesel as it extends the range and decreases cost on fuel and maintenance.
@@mikehotchkiss8975 Agreed with you on that Mike. :) Diesels are meant to be efficient, not meant to be coal rolling. Lol... I hope aircraft manufacturers switch to diesel, so we can have more efficient small airplanes and better fuel economy (in turn, less CO2 emissions)
These engines are coming along in this field slowly but surely. If they can get the weight down, they would be excellent with their low rpm power curve. Awesome and informative video, Visio!
I've seen a Cessna 172 with a Thielert engine at one of the local airports, but haven't had the opportunity to fly it. It's a little slower than a gas-engine 172, but runs on jet fuel (cheaper) and uses about half as much (4.5 gallons per hour in cruise instead of 9).
Seems almost too good to be true: cheaper fuel, half the fuel consumption, easier and cheaper to operate considering how difficult it can be to get 100LL Avgas in some places around the world! I can easily see why people start talking about industrial conspiracies in some energy sectors.
Remember those little Cox & Testors Engines in those toy cars & planes? There was no RC so you just held the tether and controlled it that way. Remember, you had to hook up a battery to get the glow plug hot when starting it up. They used "glow fuel" which of course, was a fuel & oil mix. They were essentially, little 2 stroke diesels!
A glow engine is ignited by the glow plug, not compression ignition... so it's not a diesel, just an Otto cycle engine with really bad ignition timing. The Wikipedia page for "Glow fuel" is good - it explains both the composition of the fuel (mostly alcohol, which wouldn't work in a diesel), and the operation of the glow plug.
I only drive turbo diesel vehicles. 99 Ford 7.3 Powerstroke, 04 Chevy 2500 HD Duramax, 2008 Jeep Grand Cherokee 3.0 Tdi, 09 VW Jetta CRD. I get over 100% better fuel economy in those vehicles than their gas class equivalents, excepting the Jetta. Would have zero problem with a turbo diesel aircraft.
The Austro diesel was developed as a response to the problems of the original Thielert Centurion engine and reduction gearbox (now, after further development, the Continental CD135/155) that Daimond used. However, the Austro Diesel had a cast iron block like the original Mercedes OM640, while the Thielert 1.7 (based on mercedes OM668 engine) and later 2.0 (OM640) originally had a cast aluminium block. New CD-170 is Continental own development with cast iron block and reduced static compression but higher filling pressure from turbocharger.
While Diamond Aircraft is said to have made about 1500 examples of the DA-4 twin, most are the Lycoming gas engine version. The diesel engine is an expensive option. And not all that economical to operate as it needs an expensive propeller gearbox overhaul at frequent intervals. The downtime is a killer for flight schools. The makers of diesel aircraft engines are careful NOT to refer to their engines as diesel but as compression ignition engines. Most of them are certified only for Jet-A, not diesel. The difference is diesel fuel lubricity is not right for the injection systems in aircraft. Also diesel fuel is subject to the EPA's "Boutique Blending" mandate where the fuel is formulated differently for different parts of the country and the year. Jet fuel is the same everywhere and year round. As for those waiting for the DeltaHawk 400hp V-8: Maybe your grand kids will see and hear it. The 4 cylinder 180-200hp engine they are teasing has been under development since the mid-1990s. No certification. No deliveries yet.
fidel catsro well, technically speaking the turbofans that power jets like the 747 are a compression ignition engine using the same fuel as these engines (jet a, pretty much kerosene)
yes agreed amigo but they dont clunk like a piston diesel engine... thats what i want to see.. a piston diesel engine 747 airliner that goes clunk clunk clunk...
Diesel engines have historically struggled with getting a sufficiently high power to weight ratio to make them viable, it only modern diesel improvements that make it possible. In the 1940's the Napier Deltic was a uk attempt at a diesel aero engine, it ultimately became a legend in railway history.
320ifq lucas It's a copy of a junkers engine thought. Junkers did get a reasonable power to weight ratio (the Jumo 205s for example is better than the napier deltic ones).
He needed to look at the old Packard 9 cylinder aircooled radial diesel airplane engine it was a four stroke engine with only one valve per cylinder working as both intake and exhaust valve
Claiming that a supercharger was required for an OP Junkers Jumo engine at 6:29 is not so. Such engines need mechanical SCAVENGING, like by a Roots blower. Huge difference.
Diesels are so ideal for aircraft .They rev at the right speed for a propeller with torque that punches like a boxer and greater range because of a diesel engines relative economy. For example, the fuel capacity of 76 gallons for a Cessna 172 s p is already great with avgas...Imagine the range increase with that much diesel !
Most important Diesel airplane in Europe is the Robin Dr401 155CDI. It’s more efficient than the Diamond DA 40 in real life. I flew both... Also Avgas versions. That Diesel is so quit and much more reliable.
I brought back a 504 from South America when in the USAF back in the 80's and ran a mix of diesel and JP4 jet fuel. It ran great and made good power to. Nothing really new here.
Those diesel Peugeot's were common this side off the Atlantic also.When Ford launched its new Sierra here back around 80 they had no diesel engine off their own so used the old 504 2.3 liter unit.Good economy but woefully slow.
Damm, the opposed piston 6 cylinder form junkers was beautiful. And smooth AF. I really hope opposes piston engines do a comeback, specially since the higher thermal efficiencies they can achieve. Imagine A 6 cylinder mounted flat on a subie :3
amazing video, I never believed that diesel engines had their application in aviation, and that I am a petrolhead, but I loved this video, cheers from Venezuela
I recall reading about an aircraft endurance test by a competitor of Charles Lindbergh that lasted until the B-52 came out. The aircraft had an experimental diesel engine but was turned down for production due to the horrendous smell it made. Since diesel fuel isn't as explosive as normal aircraft fuel you would think that it would be in high demand for aircraft because you don't want aircraft disaster survivors burning up. Unfortunately this isn't the case as aerosolized diesel fuel can detonate in a similar way to jet fuel if the accident is violent enough as was the case in the Ladbroke Grove rail crash of 1999.
# Tako That I do believe was a PACKARD aero diesel built in the 1930 and set many distance records because of the low fuel burn !! ! BUT the 1930's were not a good economic time and little was built then for a hungry nation !!!!
Diesel aero engines make a lot of sense for various reasons, not least of which is logistics because they will run on jet fuel. AvGas isn’t nearly as common as jet fuel.
Evando Apusagaseta maybe your country needs diesel engine with lots of torque. Because 2.5L engine with 146 HP sure have a great amount of torque, or the engine is just build for reliabilty, so they lowered the power
Good video, but as an aside, Junkers is properly pronounced like "young-kers", not "jun-kers"; also, Jumo is "you-mo" and not "ju-mo", since it's a portmonteau of Junkers and Motorenwerke.
The supercharger on a 2 stroke diesel is pretty much necessity based tho, you just can't get the air inside the cylinders with enough pressure on crank case scavenging alone, the turbo is there for the added efficiency.
The problem with Diesel engines is that they are limited in the RPM in which they can operate. Gasoline is much higher, alcohol even higher and Nitro Methane higher than that. One of the keys to high horsepower I'd it's ability to run at high RPM. Diesels just can't to that, but they can produce incredible amounts of torque at low RPM, which makes them the go to engine for trucking. It just so happened that aircraft engines operate best at low RPM, especially when they are propellers for thrust, and the propellers work best well below the speed of sound. The propeller tips can easily surpass the speed of sound under high power setting needed for take off or climb out. So the Diesel was a no brained for the private aircraft industry. By the way, I love the Delta Hawk design. They are currently building four cylinder engines making up to 200hp, but in 6 or 8 cylinder configurations they can make 3 to 400hp easily! All I need to do is win the lottery, then plan my build around the 400hp version once they are released for construction!
Actually, gasoline engines are capable of making more torque than diesels at any rpm, the limit is the strength of the structure of the engine. Most of these modern diesel aircraft engines also require gearboxes to reduce the propeller rpm and if you do the same with a gasoline engine (as done with the Adept Airmotive 320T), you end up with a very light and powerful engine. Modern gasoline engines can also run on mogas, which is even cheaper than jet fuel, and modern gasoline engines use less fuel than the old LyContisaurus engines. The real problem with diesels is their weight, which is partially a consequence of their low rpm. The faster you can spin an engine, the better its power to weight ratio, and gasoline engines are capable of MUCH better power to weight ratios.
Delta hawk... released for production? That would be nice, seeing as some people placed deposits 15 years ago and STILL do not have a working engine... do your homework.
having messed with the Austro a decent bit... not a fan its a converted Mercedes engine and has alot of compromises as such it has some issues. ERAU owns $10mil in DA-42s and cant keep them in the air. Its a very well preforming light twin but im looking forward to Austro doing a from scratch engine, they in general, are going in the right direction.
The austro in the da40,42,62 is made by Mercedes and modified for aircraft use. Its an awesome engine that requires very little maintenance. I think they're approved for a 2000hr TBO now. I wish there was an stc to install these in the DA20.
I actually would rather have a Fiat diesel engine than a reused design from the 1960's like almost all GA aircraft When you consciously choose Fiat, then you know it's bad...
i know its not a piston engine, but you forgot the ultimate diesel powered plane....the SU-25. it can run on anything, including Diesel!!! same for the RD33 in the mig29
I want to see the STC for the 182 with the diesel. The YAK-152... 😂 YAKS are a breed of their own. They’re like the Russian Jeep aircraft of their own. They’ll run on vodka if necessary.
I don't understand why all piston engine planes are not diesel engine powered. AV gas is so freaking expensive in comparison and with the prop the engines aren't usually turning over 3.5k so diesels are perfect. Diesels can be super simple with the only downside when compared to gasoline being their weight. Although gasoline airplane engines are pretty overbuilt so they are not super-light. I know if I could afford a nice little twin I would outfit it with a pair of diesels.
Excess from the injectors is by-passed back to the tank, like all diesel cars, and that warms the fuel. In extreme low temps, fuel warmers are included, using the engine coolant in a heat exchanger.
Here are a few. Unresolved vibration problems, resulting in airframe and propeller cracking. Mass vs casing strengths. Reduction drive chattering at low rpm. ECU mapping and definitive redundancy. Lack of widespread service back-up. And of course, this was supposed to be an economical alternative.... IS NOT! Enough so far?
Given that 2700 rpm is both typically the limit of the propeller speed and the peak power rpm of diesel engine make it a good combination to bolt on diteclty on the crank
Nice job but the fact sheet that is on the right part of it is hidden and therefor can't see all of the text in the fact sheet. Can you fix it? Keep up the good work bud!
The only diesels which make sense to put in aircraft are 2-strokes. 4-strokes are too heavy. The Junkers OP was a great engine, and many OP diesels that came after copied aspects of that engine. Napier built Junkers engines under license before WW2, they were called the Culverin.
Not valid today. Due to turbocharging and electronically controlled commonrail direct fuel injection. Even on american railroads are big two strokers at the end of their decline. Problem is not just with efficiency (for aeroplane is weight of the fuel required for planned trip on board crucial), but also with power density. Yes, until year 2000 it could be a way...
The superchargers were fitted on the airplane engines because of air density loss with elevation. Before they started putting the superchargers on the engines the planes could have 2000 hp when taking off near sea level and have maybe half that at 30k feet.
I thought Vin was responsible for cool Diesel. Thanks for setting us straight. Perhaps you would consider: Video comparison between low-lead and diesel, in-so-far as torque and prop size/pitch. Thanks.
The problem is that due to the higher compression the cylinder walls have to be noticably thicker than with a gasoline engine, and that adds a lot of weight, which is the last thing you want as a plane manufacturer. The reasons why diesels are still used are the lower fuel-consumption and the power-curve, as diesels tend to have more torque and their max at lower rpm than petro engines, which is very good for a plane, that need a lot of torque and not that high rpm for the propeller. This is also the reason they took over for marine applications, as ships and boats need even more torque and care even less about max rpm than planes. This is also the reason you see diesels used in commercial vehicles.
No, the reason you see more diesels in commercial vehicles is because they have a much greater fuel efficiensy. Torque is irrelevant, power moves the vehicle, torque is just a static force and RPM is just a speed, you need both to move and calculate that to power. Almost all planes us a gearbox to fine tune the engines cruise power to the maximum efficensy of the prop.
If the torque was not relevant then why do all planes have engines whith a high torque-output and low revs? The same for commercial vehicles and ships. The torque is actually relevant. The reason is that the torque is the force, the hp is the overall work (that's a big difference), the revs is the way over which the force is applied to the drivetrain. If i want to move a heavy object or a object in a medium with high density i can do all the work i want over all the time and way i want, if my force is not strong enough to get the object moving it doesn't matter. And that's why on everything connected to a heavy object (ships, planes and mainly trucks, but in general commercial vehicles) you see engines with high torque. Yes, every modern prop-plane uses a gearbox to optimize the engine, but if the engine has too little torque you'd need more closely spaced gears to get and keep the propeller moving, which means to reach the same top speed you'd need a few more gears, and this is ether too heavy or too bulky to be worth putting an engine with low torque in a plane. So no, torque is not irrelevant, and the efficency is not the only reason to use a diesel (although it is the only reason for a normal diesel car, as they all are light enough and can't carry enough to need the extra torque). I hope that little physics lesson did explain why you need torque, and why especially with heavy vehicles hp isn't as relevant as with normal cars.
"If the torque was not relevant then why do all planes have engines whith a high torque-output and low revs?" Because the rpm of the propellers is limited, you have to keep the tips of the propeller blades below the speed of sound. Power tells you how fast you can apply torque, the more power you have, the more torque you can apply at a given rpm.
astrofan Because high torque engines are operating at a lower RPM you get better reliability (Critical for aircraft and commercial vehicles), lower fuel consumption and longer lifespan. You don't need a high torque engine to move heavy things, Turboprops produce less torque than the avarage diesel car and produces tens of thousands of HP. You need a good torque output of the gearbox to move heavy things... The only relevant specs for an engine is Peak power and power band, with those two you know what you get. If you want to create a transmisson for said engine you need to look up the torque specs and RPM specs for it so you can determine the gear ratio and output torque you want. The whole torque myth is created by people missunderstanding physics....otherwise Jet engines would be the worst form of engine.
Diamond are excellent and probably the best small aircraft in the world at this point, as for the Italian converted Seat or Fiat , I’ll never get on one, it will probably break down like most Fiats.
My airplane has two 1.7L Diesel engines. If you live near Texas you’re more than Welcome to come see and fly it for a video. Yes it’s a Diamond.
Da42?
Thats super BADASS!!! got any videos of it???
I live just outside Houston, would love to check out your plane some time. I’m a diesel and aviation fanatic so seeing that would be neat.
Very cool. Do you have any issues refueling when you land on other runways?
Wish I stayed close enough to see it
6:50
Something that never fails to put a smile on my face is an elderly person that happy.
You forget the most notorious one: the Soviet WWII heavy bomber Petlyakov PE-8 bomber with four V-12 turbodiesel engines.
@VisioRacer - Thank you for NOT dubbing music over the sounds of the engines. The engine sound was "music" to my ears.
THERE'S ONE MORE COMPANY!
I was head development technician for a British company called Wilksch Airmotive, who also designed and produced various aircraft Diesel engines.
Our engines were 2-stroke, Aluminium construction, with supercharger integrated to the block, turbocharged, and had overhead camshaft for exhaust, 2 valves per cylinder.
They were available in inverted inline 3 or 4 cyclinder variants, with up to 50KW per cyclinder, and we were able to reach 240g/KWH fuel efficiency with a totally mechanical, indirect, non-common rail fuel system. All this and it would run on any fuel similar to diesel (even recycled plastic) and a 1000hr TBO.
The 4 cylinder engine I tested before leaving the company was producing 200KW (about 270hp) at 2750rpm, and burning less than 12gal/hr of diesel.
The company still exists, but I don't think they're selling new units anymore.
This takes rolling coal to a whole new level
Notice a complete lack of black smoke? Black smoke is a sign of too much fuel and too little air, not to mention small testicles. These units adopted diesel as it extends the range and decreases cost on fuel and maintenance.
@@mikehotchkiss8975 Agreed with you on that Mike. :) Diesels are meant to be efficient, not meant to be coal rolling. Lol... I hope aircraft manufacturers switch to diesel, so we can have more efficient small airplanes and better fuel economy (in turn, less CO2 emissions)
I see what you did there.
These engines are coming along in this field slowly but surely. If they can get the weight down, they would be excellent with their low rpm power curve. Awesome and informative video, Visio!
2:52 Balls of steel
Eh downward slope. Hes off the ground half way down.
The Lycoming DEL-120 is actually the same FIAT Multijet engine used for the DieselJet one ;) fun to see so many FIAT diesel-powered airplanes!
4:19 - "Your UAV is ready to deploy".
One of the nice things about diesel is once the engine is running you don't have to rely on magneto power for the plugs...
I've seen a Cessna 172 with a Thielert engine at one of the local airports, but haven't had the opportunity to fly it. It's a little slower than a gas-engine 172, but runs on jet fuel (cheaper) and uses about half as much (4.5 gallons per hour in cruise instead of 9).
Seems almost too good to be true: cheaper fuel, half the fuel consumption, easier and cheaper to operate considering how difficult it can be to get 100LL Avgas in some places around the world!
I can easily see why people start talking about industrial conspiracies in some energy sectors.
if they are diesel, in europe it would be cheaper to put diesel in it
There is a Cessna 172 with a Thielert engine in CYPK.
@@def787 It could be the same plane, since CFC moved from ZBB to YPK a few years ago.
Remember those little Cox & Testors Engines in those toy cars & planes? There was no RC so you just held the tether and controlled it that way. Remember, you had to hook up a battery to get the glow plug hot when starting it up. They used "glow fuel" which of course, was a fuel & oil mix. They were essentially, little 2 stroke diesels!
A glow engine is ignited by the glow plug, not compression ignition... so it's not a diesel, just an Otto cycle engine with really bad ignition timing.
The Wikipedia page for "Glow fuel" is good - it explains both the composition of the fuel (mostly alcohol, which wouldn't work in a diesel), and the operation of the glow plug.
5:33 listen to the turbos and the engine 😁❤️ like a truck!
Diesel powered aeroplanes are so rare, i bet most haven't heard of such an example. And that exact reason is why i find this video very interesting
This takes my knowledge about plane engines to a new level
6.1L twin turbo diesel V12 whoaaaaaaa
simillar to lmp1 cars from 2007-2010 V12 5.5
@@alessandroarizaluski9178 Peugeot 908 HDI
I only drive turbo diesel vehicles. 99 Ford 7.3 Powerstroke, 04 Chevy 2500 HD Duramax, 2008 Jeep Grand Cherokee 3.0 Tdi, 09 VW Jetta CRD. I get over 100% better fuel economy in those vehicles than their gas class equivalents, excepting the Jetta. Would have zero problem with a turbo diesel aircraft.
Big advantage to diesel is that there's more energy per gallon/lb. than gasoline. Longer ranges with less weight
diesel fuel is heavier ,, no matter what you have to carry your carbon on your back
The fuel density means longer range with less volume, but not less weight.
The Austro engines that go into Diamond Aircfraft are Mercedes btw. You can even see Mecredes printed on the crank case.
The Austro diesel was developed as a response to the problems of the original Thielert Centurion engine and reduction gearbox (now, after further development, the Continental CD135/155) that Daimond used. However, the Austro Diesel had a cast iron block like the original Mercedes OM640, while the Thielert 1.7 (based on mercedes OM668 engine) and later 2.0 (OM640) originally had a cast aluminium block. New CD-170 is Continental own development with cast iron block and reduced static compression but higher filling pressure from turbocharger.
I love aircraft!! almost got my rec pilots license....but at $120 an hour I couldn't afford all the hours required😖! do more aircraft videos please!!
While Diamond Aircraft is said to have made about 1500 examples of the DA-4 twin, most are the Lycoming gas engine version. The diesel engine is an expensive option. And not all that economical to operate as it needs an expensive propeller gearbox overhaul at frequent intervals. The downtime is a killer for flight schools.
The makers of diesel aircraft engines are careful NOT to refer to their engines as diesel but as compression ignition engines. Most of them are certified only for Jet-A, not diesel. The difference is diesel fuel lubricity is not right for the injection systems in aircraft. Also diesel fuel is subject to the EPA's "Boutique Blending" mandate where the fuel is formulated differently for different parts of the country and the year. Jet fuel is the same everywhere and year round.
As for those waiting for the DeltaHawk 400hp V-8: Maybe your grand kids will see and hear it. The 4 cylinder 180-200hp engine they are teasing has been under development since the mid-1990s. No certification. No deliveries yet.
can't wait to see a diesel clunking Cummins 747 passenger plane...
fidel catsro well, technically speaking the turbofans that power jets like the 747 are a compression ignition engine using the same fuel as these engines (jet a, pretty much kerosene)
yes agreed amigo but they dont clunk like a piston diesel engine... thats what i want to see.. a piston diesel engine 747 airliner that goes clunk clunk clunk...
And rolls coal midair
Look up a b52 or kc135 water injection takeoff, also known as a "wet" takeoff.
To roll coal midair you run a Corvair 990
Excellent video!! Very interesting
Still waiting for a Detroit diesel Screamin demon Cessna 172
the engine alone probably weighs more then the rest of the plane :D
Diesels don't kill people and are 100% harmless!.. "Oh yah?.. Predator drones..". Lol!. 😄🤗😁
Diesel engines have historically struggled with getting a sufficiently high power to weight ratio to make them viable, it only modern diesel improvements that make it possible. In the 1940's the Napier Deltic was a uk attempt at a diesel aero engine, it ultimately became a legend in railway history.
320ifq lucas It's a copy of a junkers engine thought. Junkers did get a reasonable power to weight ratio (the Jumo 205s for example is better than the napier deltic ones).
Napier licensed the Culverin and Deltec engines from Jumo.
He needed to look at the old Packard 9 cylinder aircooled radial diesel airplane engine it was a four stroke engine with only one valve per cylinder working as both intake and exhaust valve
Claiming that a supercharger was required for an OP Junkers Jumo engine at 6:29 is not so. Such engines need mechanical SCAVENGING, like by a Roots blower. Huge difference.
I know a guy who owns a Cessna 172 with a Corvette motor. It is such a weird sensation to hear a corvette fly over your house.
The one thing better than a V8 driving by? V8 flying by above you!
Did not know they used diesel in aircraft! Great vid!
Diesels are so ideal for aircraft .They rev at the right speed for a propeller with torque that punches like a boxer and greater range because of a diesel engines relative economy. For example, the fuel capacity of 76 gallons for a Cessna 172 s p is already great with avgas...Imagine the range increase with that much diesel !
I don't know how I missed seeing these before ! Thanks for putting this compilation together Samuel !🌵
Jet fuel is similar to diesel fuel, so in a way, jet liners are diesel planes :)
Not really, they have spark plugs for ignition :)
A diesel plane has a diesel engine. A diesel engine uses the diesel cycle. Jet planes do not use the diesel cycle. Jet planes are not diesel planes.
Diesel fuel and turbine (or "jet") fuel are similar, but diesel engines and turbine engines are not.
If there's one thing the Russians do well, its aircraft! That V12 diesel sounds amazing and the aircraft has nice styling!
Most important Diesel airplane in Europe is the Robin Dr401 155CDI. It’s more efficient than the Diamond DA 40 in real life. I flew both... Also Avgas versions. That Diesel is so quit and much more reliable.
I love your videos mate. They're an engine lover's dream.
2:50 Jesus, I wouldn’t want to fly on that strip on a gusty day.
Why? No crosswind problems when you are down between the trees 😁
@@benghazi4216 The increased obstacle problems more than outweighs the marginal loss in crosswind!
Im glad to see more investment in diesel tech after most car companies stopped investing in new diesel tech thanks to EU laws.
I brought back a 504 from South America when in the USAF back in the 80's and ran a mix of diesel and JP4 jet fuel. It ran great and made good power to. Nothing really new here.
Those diesel Peugeot's were common this side off the Atlantic also.When Ford launched its new Sierra here back around 80 they had no diesel engine off their own so used the old 504 2.3 liter unit.Good economy but woefully slow.
Damm, the opposed piston 6 cylinder form junkers was beautiful. And smooth AF. I really hope opposes piston engines do a comeback, specially since the higher thermal efficiencies they can achieve. Imagine A 6 cylinder mounted flat on a subie :3
Me too. Superior has the Gemini 125 and 200 that I really want. Haven’t seen anything more on them in a long time now.
When a plane sounds like a boat
amazing video, I never believed that diesel engines had their application in aviation, and that I am a petrolhead, but I loved this video, cheers from Venezuela
Awesome, love when u come to aviation engines. More please! For example: The 10 best Bushplane engines or the lightest /smallest aircraft engines etc
I didn't even know such things as diesel powered planes existed, bravò for the video
would love to see a plane cold crank then knock and cough to life with a cloud of black smoke like an old caterpillar dozer
Forget Rolling Coal, it's all about Flying Coal 😆
I recall reading about an aircraft endurance test by a competitor of Charles Lindbergh that lasted until the B-52 came out. The aircraft had an experimental diesel engine but was turned down for production due to the horrendous smell it made.
Since diesel fuel isn't as explosive as normal aircraft fuel you would think that it would be in high demand for aircraft because you don't want aircraft disaster survivors burning up. Unfortunately this isn't the case as aerosolized diesel fuel can detonate in a similar way to jet fuel if the accident is violent enough as was the case in the Ladbroke Grove rail crash of 1999.
# Tako That I do believe was a PACKARD aero diesel built in the 1930 and set many distance records because of the low fuel burn !! ! BUT the 1930's were not a good economic time and little was built then for a hungry nation !!!!
The Delta Hawk is very promising.
At 2:25 the whistle of Austro turbo charger resembles that of Daimler DB 205 Me 109 aircraft passing...
Diesel aero engines make a lot of sense for various reasons, not least of which is logistics because they will run on jet fuel. AvGas isn’t nearly as common as jet fuel.
2 litres 186hp?
I want that engine to my car really.....
toaster for me it's spectacular because here in my country 2.0L diesel engine is quiet uncommon
2.5L Turbo with about 146hp is more common here
Well with a turbo, you can easily get that power
b16b was a 1.6L non turbo with 185hp and thats from the 90s :)
Evando Apusagaseta maybe your country needs diesel engine with lots of torque. Because 2.5L engine with 146 HP sure have a great amount of torque, or the engine is just build for reliabilty, so they lowered the power
Jaguar/LandRover have a 2l diesel with 240hp and 500Nm (369lbft).
Another reason to enjoy the smell of diesel in the morning flying off to work or use your airplane like a taxi for Islands
Im going to put a Lamborghini engine in a cessna now. Thanks for the idea.
Good video, but as an aside, Junkers is properly pronounced like "young-kers", not "jun-kers"; also, Jumo is "you-mo" and not "ju-mo", since it's a portmonteau of Junkers and Motorenwerke.
Love twinchargers
R A M C H A R G E R S ! ! !
The supercharger on a 2 stroke diesel is pretty much necessity based tho, you just can't get the air inside the cylinders with enough pressure on crank case scavenging alone, the turbo is there for the added efficiency.
Funny how you talk about the Lycoming DEL-120 in an MQ1C... and picture/video a Pred B with a turboprop Honeywell TPE331 taking off/Taxing around. Lol
The problem with Diesel engines is that they are limited in the RPM in which they can operate. Gasoline is much higher, alcohol even higher and Nitro Methane higher than that. One of the keys to high horsepower I'd it's ability to run at high RPM. Diesels just can't to that, but they can produce incredible amounts of torque at low RPM, which makes them the go to engine for trucking.
It just so happened that aircraft engines operate best at low RPM, especially when they are propellers for thrust, and the propellers work best well below the speed of sound. The propeller tips can easily surpass the speed of sound under high power setting needed for take off or climb out. So the Diesel was a no brained for the private aircraft industry.
By the way, I love the Delta Hawk design. They are currently building four cylinder engines making up to 200hp, but in 6 or 8 cylinder configurations they can make 3 to 400hp easily! All I need to do is win the lottery, then plan my build around the 400hp version once they are released for construction!
Actually, gasoline engines are capable of making more torque than diesels at any rpm, the limit is the strength of the structure of the engine. Most of these modern diesel aircraft engines also require gearboxes to reduce the propeller rpm and if you do the same with a gasoline engine (as done with the Adept Airmotive 320T), you end up with a very light and powerful engine. Modern gasoline engines can also run on mogas, which is even cheaper than jet fuel, and modern gasoline engines use less fuel than the old LyContisaurus engines.
The real problem with diesels is their weight, which is partially a consequence of their low rpm. The faster you can spin an engine, the better its power to weight ratio, and gasoline engines are capable of MUCH better power to weight ratios.
Delta hawk... released for production? That would be nice, seeing as some people placed deposits 15 years ago and STILL do not have a working engine... do your homework.
The Mercedes OM606 revs pretty high
Turbine engines basically run on diesel if you think about it, jet fuel is just a high sulfur diesel
@3:06 That is one scary looking strip.
Did I see that correct they drive under a power line?
The OM611 also served as an aircraft engine supposedly.
2:15 I know that Airport, I´ts the nearest from where I life. This Airport is in Graz/Austria
fantastic 2 litre diesel engines ...should install on my bike too
Super interesting. Always wondered about diesel aero use.
having messed with the Austro a decent bit... not a fan its a converted Mercedes engine and has alot of compromises as such it has some issues. ERAU owns $10mil in DA-42s and cant keep them in the air. Its a very well preforming light twin but im looking forward to Austro doing a from scratch engine, they in general, are going in the right direction.
JetA is very comparable to diesel fuel. The problem with diesel in an airliner is its tendency to gel up at lower temperatures.
The austro in the da40,42,62 is made by Mercedes and modified for aircraft use.
Its an awesome engine that requires very little maintenance. I think they're approved for a 2000hr TBO now.
I wish there was an stc to install these in the DA20.
Do a video on Toyota JZX series and Nissan Laurel/Cefiro series
It is worth knowing that the Austro engine is base on the defunct Thielert, and the Lycoming is a license built Austro.
Please stop calling them "compression ignition" it is injection ignition!!! Rudolph Diesel invented timed injection... NOT high compression.
I actually would rather have a Fiat diesel engine than a reused design from the 1960's like almost all GA aircraft
When you consciously choose Fiat, then you know it's bad...
Common rail very good for flights
0:14 WHAT!!!
everything work on diesel except cars...
i know its not a piston engine, but you forgot the ultimate diesel powered plane....the SU-25. it can run on anything, including Diesel!!! same for the RD33 in the mig29
wow sukhoi running on diesel!
A jet engine will run on anything thaw is both liquid and flammable.
Yeah but they normally run them on coal, at least that's what it looks like in most vids I've seen.
lol, rollin coal with the best of em XD
but most jet engines run on jp7 or jp6. theyre not designed to run diesel though specially made engines can run it
I want to see the STC for the 182 with the diesel. The YAK-152... 😂 YAKS are a breed of their own. They’re like the Russian Jeep aircraft of their own. They’ll run on vodka if necessary.
Also don't forget that petrol is more available as in for each barrel of crude oil there is way more petrol than diesel
I don't understand why all piston engine planes are not diesel engine powered. AV gas is so freaking expensive in comparison and with the prop the engines aren't usually turning over 3.5k so diesels are perfect. Diesels can be super simple with the only downside when compared to gasoline being their weight. Although gasoline airplane engines are pretty overbuilt so they are not super-light. I know if I could afford a nice little twin I would outfit it with a pair of diesels.
The only drawback is the worry over fuel jelling. I guess a warming system could be implemented?
Excess from the injectors is by-passed back to the tank, like all diesel cars, and that warms the fuel. In extreme low temps, fuel warmers are included, using the engine coolant in a heat exchanger.
@@tonyforrester9570 Very cool info! TY:)
Modern aircraft Diesel engines typically run on jet fuel which contains anti-icing additives.
Many aircraft engines have engine oil coolers that heat exchange to the fuel before reaching the injectors. This is also common on jet engines too.
the only problem with a engine sound demonstration of an aircraft piston engine is that you get loads of prop noise which drowns out the exhaust
Nothing was mentioned of the limitations that prevented it becoming more widely adopted.
Here are a few.
Unresolved vibration problems, resulting in airframe and propeller cracking.
Mass vs casing strengths.
Reduction drive chattering at low rpm.
ECU mapping and definitive redundancy.
Lack of widespread service back-up.
And of course, this was supposed to be an economical alternative.... IS NOT!
Enough so far?
Diesel engines have lower power density and horsepower to weight ratio than Otto or gas turbine engines.
@@tonyforrester9570 Inline 6 and V-12 Diesel engines have no vibration problems.
Great compilation. the way you say Junkers is hilarious. Is it realy how ppl from english countries call it?
Visio is not English, he just doesn't know better.
Given that 2700 rpm is both typically the limit of the propeller speed and the peak power rpm of diesel engine make it a good combination to bolt on diteclty on the crank
Nice job but the fact sheet that is on the right part of it is hidden and therefor can't see all of the text in the fact sheet. Can you fix it? Keep up the good work bud!
The only diesels which make sense to put in aircraft are 2-strokes. 4-strokes are too heavy. The Junkers OP was a great engine, and many OP diesels that came after copied aspects of that engine. Napier built Junkers engines under license before WW2, they were called the Culverin.
And that's how the Napier Delta was born. Basically three Junkers engines with common crankshafts cast into a triangular block.
Not valid today. Due to turbocharging and electronically controlled commonrail direct fuel injection. Even on american railroads are big two strokers at the end of their decline. Problem is not just with efficiency (for aeroplane is weight of the fuel required for planned trip on board crucial), but also with power density. Yes, until year 2000 it could be a way...
The superchargers were fitted on the airplane engines because of air density loss with elevation. Before they started putting the superchargers on the engines the planes could have 2000 hp when taking off near sea level and have maybe half that at 30k feet.
I thought Vin was responsible for cool Diesel. Thanks for setting us straight.
Perhaps you would consider:
Video comparison between low-lead and diesel, in-so-far as torque and prop size/pitch. Thanks.
Funny, that Centurion 4.0 sounds almost exactly like the Daimler powered Messerschmitt bf109
@7:40; strange, it sounds a bit like a Detroit Diesel.
its a 2 stroke
I love your videos! But the pictures of airplanes powered by the Thielert Centurion OM629 were not actually airplanes powered by the OM629....
Diesels are probably better overall for aviation applications because they don't work as hard, hence they can run for much longer. My thought.
The problem is that due to the higher compression the cylinder walls have to be noticably thicker than with a gasoline engine, and that adds a lot of weight, which is the last thing you want as a plane manufacturer. The reasons why diesels are still used are the lower fuel-consumption and the power-curve, as diesels tend to have more torque and their max at lower rpm than petro engines, which is very good for a plane, that need a lot of torque and not that high rpm for the propeller. This is also the reason they took over for marine applications, as ships and boats need even more torque and care even less about max rpm than planes. This is also the reason you see diesels used in commercial vehicles.
No, the reason you see more diesels in commercial vehicles is because they have a much greater fuel efficiensy. Torque is irrelevant, power moves the vehicle, torque is just a static force and RPM is just a speed, you need both to move and calculate that to power.
Almost all planes us a gearbox to fine tune the engines cruise power to the maximum efficensy of the prop.
If the torque was not relevant then why do all planes have engines whith a high torque-output and low revs? The same for commercial vehicles and ships. The torque is actually relevant. The reason is that the torque is the force, the hp is the overall work (that's a big difference), the revs is the way over which the force is applied to the drivetrain. If i want to move a heavy object or a object in a medium with high density i can do all the work i want over all the time and way i want, if my force is not strong enough to get the object moving it doesn't matter. And that's why on everything connected to a heavy object (ships, planes and mainly trucks, but in general commercial vehicles) you see engines with high torque.
Yes, every modern prop-plane uses a gearbox to optimize the engine, but if the engine has too little torque you'd need more closely spaced gears to get and keep the propeller moving, which means to reach the same top speed you'd need a few more gears, and this is ether too heavy or too bulky to be worth putting an engine with low torque in a plane. So no, torque is not irrelevant, and the efficency is not the only reason to use a diesel (although it is the only reason for a normal diesel car, as they all are light enough and can't carry enough to need the extra torque).
I hope that little physics lesson did explain why you need torque, and why especially with heavy vehicles hp isn't as relevant as with normal cars.
"If the torque was not relevant then why do all planes have engines whith a high torque-output and low revs?"
Because the rpm of the propellers is limited, you have to keep the tips of the propeller blades below the speed of sound.
Power tells you how fast you can apply torque, the more power you have, the more torque you can apply at a given rpm.
astrofan
Because high torque engines are operating at a lower RPM you get better reliability (Critical for aircraft and commercial vehicles), lower fuel consumption and longer lifespan.
You don't need a high torque engine to move heavy things, Turboprops produce less torque than the avarage diesel car and produces tens of thousands of HP. You need a good torque output of the gearbox to move heavy things...
The only relevant specs for an engine is Peak power and power band, with those two you know what you get. If you want to create a transmisson for said engine you need to look up the torque specs and RPM specs for it so you can determine the gear ratio and output torque you want.
The whole torque myth is created by people missunderstanding physics....otherwise Jet engines would be the worst form of engine.
Even a faster way to pollute the ozone layer😃
Thank you for very good and informative video. :-) Peace with you :-)
Good stuff, as usual!
Rollin Coal high in the air
Blowin black Smoke like I just don't care
Aileron roll with dramatic flair
Goddamn your channel has some diversity
Rolling Coal isn't just for jacked up trucks
You forgot to mention the EPS graflight v8 ;-)
you should have showed the motor not the plane, that would have being far more interesting
Diamond are excellent and probably the best small aircraft in the world at this point, as for the Italian converted Seat or Fiat , I’ll never get on one, it will probably break down like most Fiats.