The Twingle Split Single Engine used for 70 years 🤯
Vložit
- čas přidán 27. 04. 2024
- In this video we analyze the split single engine also known as Twingle.
We will see how it works, why it was invented and why it fell into disuse.
Also because it was used by many motorcycle brands.
#twingle #engine #turbo #repairman22 #power #speed #piston #horsepower #2stroke #2strokes - Auta a dopravní prostředky
Touch CC on the screen to turn off the subtitles. I also animate 3D real stories on my second channel: @Trueeventsin3D
Hi
If possible, can you introduce this two-stroke engine? Thank you.
forum.jorsindo.com/data/attachment/forum/201303/31/232919b8g83fupmr9mrmg7.gif
i.ntdtv.com/assets/uploads/2013/03/p3318701a990706700.jpg
Thank you :-) I am telling to people, that Puch was one of the best constructionist at that time 🙂 Pwy 🙂
@@TrueEventsin3Dhi
small detail 1:14 'intake and exhaust occur at the same time' research "blowdown" or the time (in crank degrees) the exhaust is open before the transfer port is opened. reducing cylinder pressure to prevent reversion into the tansfers.
you're also wrong in your understanding of "torque" which is strictly a function of the power stroke, the piston area, rod length, and crank pin offset.
excellent description of the expansion chamber function.
I had never seen a twin single engine explained before. Nice.
I bought a used Sears Puck 250 in 1975. Interesting engine, lots of low end torque. Wished I still had it.
Yes, I remember the Allstate 175 made by 'Puch' and sold by Sears.
250 puch 2 stroke sold by sears was my first motorcycle given to me by my step brother in 1973. Before even starting it someone passing by on the road offered to trade his 1973 DKW Sachs 125 dirt bike for it. So I owned a puch 250 for only 5 minutes.
This is the best summary of the Twingle I have seen.
You might be interested to know that there was some development towards making a 700cc double twingle for the Mini. It offered being lighter and more powerful than the 4-stroke 850 engine eventually used. The main problem with the Twingle is overrun going down hill where the bores and bearings are starved of oil, the same problem as with the two stroke Saabs.
One big benefit of the Twingle compared with a standard two stroke is high torque at low rpm, which expansion chambers don't have. That's why they were ideal for Puch in mountainous Austria. But when small 4 strokes started to get a lot more powerful after WW2, this ceased to matter. And 4 strokes were cleaner and used less oil.
The oil starvation issue was solved with oil injection systems like Suzuki's CCI.
@@mikecrimlis3366 But it introduces a new problem since plenty of oil is needed because the engine is turning fast but there is not enough combustion to burn it off.
The oil starvation problem was somewhat mitigated by using a freewheel (one-way clutch or sprag clutch) so the engine was only at tickover speed on descents.
@@harrygatto True but this made them illegal in the UK and perhaps other countries as engine braking on long descents was regarded as a safety feature.
@@Turnipstalk Yes as this is effectively coasting which is illegal. However, many years ago I owned a couple of Saabs with freewheel in the UK which were deemed legal, registered and with MOT (10 year I think at the time).
Amazing, been driving for 50 years, love cars, lived in the town where Bubble cars were made, but never even heard of this engine type. Thank you I enjoyed every minute.
Thanks for sharing
New to me too, looks efficient, expansion chamber on the triumph?
(The cornet, @ 3:56)
Never heard of the twingle. Interesting!
I LOVE THESE VIDEOS, Cause this is the place to go where you wanna go when you think you know all about engines, but theres more to see, and its type of content know one else gives, showing deisgns and internals and explaining in depth from historical point of view to advantage and disadvantages, to all the components, That is next tier level yt creator.
Twingle diesel 2 stroke, and mazda patent mixed with twingle? could be cool.
LOVE THIS CHANNEL!
I had heard of Twingles but had no clue why they were a good idea. Thanks for the explanation.
Glad you mentioned the DKW
The stepped piston two stroke engine fitted to the Wolf motorcycle on display at the British National Motorcycle Museum is another version of two stroke technology.
Dear Repairman 22 you might like to do a show on the "Rotary Radial" aircraft engine which was widely used in WW-1. It's the only engine I know of where the crankshaft was bolted to the firewall and the engine rotated around around the crankshaft. It was a 2 stroke engine with the propeller bolted to the crankcase. Sooooo... the engine spun at the same speed as the prop.
The Rotary Radial was used by the French, British, and German air force.
Rotary radials are 4 strokes, every one of them. Some of the single valve Gnomes, what were called "Monosuapape' had intake transfer flutes in the cylinders that were uncovered at the bottom of the stroke but they were all 4 strokes, despite the smoke and 2 cycle style of fuel air transfer.
Strangest radial engine was the Fairchild-Caminez. 4 cylinder, 4 stroke that had 4 power strokes per revolution. All done with an ‘8’ shaped cam/ crankshaft and roller followers on the pistons - which were all linked together.
I love learning about the innovations of many past engines.
I have been a piston head for years, and this is all new to me.. Thanks
It's funny, I figured out that the pistons needed to be slightly out of phase with each other to optimize this... and then you mention it. My vision was the second one, 2 independent rods on one journal.
I first clicked on this thinking "Why? More friction?" 🤣 -- but it soon made sense.
In 1964 a friend bought a used Puch 250 SGS that would only go 20 mph. The motorcycle shops could not fix it. I did and got to know the Twingle system. In 1968 I bought one new from Sears as an Allstate. It would not run from new. I told Sears what was wrong and they would not believe a stupid customer knew anything, so they had to refund my money. Too bad, it was a nice bike for its size back then.
If it didn't run and your friend's bike only did 20 mph, how did you come to the conclusion that they were "nice bikes"? They sound like they were, in your experience, pretty crappy. I own a Ducati 250 I've owned for 45 years and it does 65~70 mph easily.
@@tauncfester3022 I said in the third sentence that I fixed it. It ran fine after that. It did more than 70mph, easy. That is why I bought a new one years later from Sears. It was DOA because the local Sears "adjusted" a running bike pre delivery and made it quit working. I offered them the fix instructions and even said I would do it myself right then and it would take less than 5 minutes. They were not about to listen to a dumb customer so I told them to stick it and got my money back. I'm still here and Sears is mostly gone.
Pity, nice looking bikes..(ah, good ol' sears..might order a resonator guitar, and a morphia/heroin/coca/syringe kit, while I'm at it?)...my how things have changed?...
I have one. It runs great. Starts on the first kick and has plenty of low end torque with good speed although being 70 years old I treat it nicely....
Thank you for the educational vid. Never heard of this one before
Enjoyed the video. Thanks. In England they're called split singles. A wonderful example of the opposed piston two-stroke is the Napier Deltic diesel with three crankshafts. Now that's an engine!
TWN = Triumph Werke Nurnberg
A bantam, anyone?..😂
In the UK there was an odd, but fairly successful, little car called theTrojan. Very plain, simple and economical it was powered by a four cylinder double, split single of 1500cc. Probably the strangest features of this engine were piston rods designed to bend (a little) and a remotely located carburettor some distance from the engine.
No passing oddity, Trojan employed this engine from the early 1920's to the early 50's, latterly in (very slow) light vans and also developed a triple, split single.
I had one of the Sears 250's for about 5 years in the 5o's !
Well done! Thank you.
The Twingle or Twin Angle engine is based on a very crude machine built be Canadian lodgers in the 18th century, it's principle was you hade two vertical pipes positioned together with wooden pistons (made from tree trunks) which would be driven up and down the pipes by a steam pump engine at the top. This was used for making waves on the river used to float the cut logs to their destination for processing. This principle was only used in a small area of Canada where the natural river water flow was not strong enough to float the logs at a reasonable speed.
Yes, At 80 plus I knew of the Puch/Allstate 2550 twingle engine. Like to have one even today.
Great work as always
Thanks again!
"IN THOSE DAYS" that was fast. It was the fastest thing that Sears sold. The little Sears Compact was actually a close second. The 2 speed Allstate MoPeds were a hoot & used on many, many paper routes. The gas cap was also an inverted cup for measuring 2-stroke oil at fill ups. (A Yamaha FZ-6 IS fast by today's standards)
I remember the old Sears Allstate 250 motorcycle had this. In those days they were fast! 😄
At close to 350 lbs with only 15 HP I wouldn’t say it was particularly fast. Mine topped out at around 65 MPH.
i only know about these engines because we have a really old lathe that uses one sadly no longer runs as the crank broke but it worked well until then besides a rare backfire like thing that it did where it would spray flaming fuel out the exhaust so we started keeping a big metal drum under it
I would have never imagined the Puch 250 to be sold in the USA. As you indirectly mentioned the technology for this kind of engine was already ancient and outdated by the time they were first produced. And I think they were made until mid 70s!
Oh and nice video.
They also made them in 175, 350 and 500cc versions. My dad had a '64 250 and I had a '67 250 I thought his was the nicer looking, but I kept mine for 20 years longer. I rode it from St. Louis to Alamosa, Colorado and all around Colorado Springs. It would only do about 60 mph and I had to draft trucks on the freeway, but it never, ever failed me.
I had a Puch 50 cc moped, it was pretty bulletproof, and got around 125 mpg…
I had an SGS 250 in '65 (a '60 model) Bombproof and it could keep up with Honda cb72.
The Twingle Triumph BD 250 was widely used by the Wehrmacht. She was produced in Nuremberg from '39 until '44.
Very interesting - thanks a lot! 👍
Very cool, thanks!
The Danish police used the Puch 250 in conjunktion with the Ariel Square Four. The Puch in towns, and the Ariel on the open road. So whereever they showed up, the bad guys had a hard time. ;o)
The Danish police must have loved the back of their engine overheating
I remember in the early 60's my dad had a Sears Allstate, the engine in that bike the pistons were front to rear, different than the one you show, during the year or two that he owned it, it burned a hole in the rear piston several times, I was about 5.
Francis! I really enjoy you animation of the many internal combustion engines! It really makes it easier to understand! Have you considered doing an animation of Bernard Hoopers' 2-stroke stepped piston engine? I believe Norton / Triumph made a prototype called the Wulf. I might be interesting to see!
I got a 66 Sears Allstate 250. It's torquey as hell with the gearing for riding through the Austrian alps, and has ridiculous whiskey throttle in 1st.
If I could get a title and parts weren't ridiculously priced, it would be nice to restore and take to car and bike shows. At this point it's just a big trail bike to ride until the piston slap takes it out 😢. I have been tempted to put the engine in something else. It would make a hell of a go kart engine😈.
My friend had a Montgomery Ward twingle in 1967. I think Puch made it. The bike had the shifter on the right and the rear brake on the left side, opposite to every bike that I ever rode. It was hard to get used to.
Modern engineering doesn't even think outside the box compared to these marvels from well over 100 years ago. Impressive, especially considering this was done before the age of computers. If anything, we have gone backwards in some respects.
Thanks for the cool video!
I used to have a belgium made FN 175cc two stroke with two pistons behind each other. It has only one spark and combustion chamber. The special thing on this type is that there is a main piston rod and the second is not fixed at the bottem of the first. It is made like the connecting rods of a star engine with hinges.
Dear, I really liked the video. I didn't know this type of engine. In mechanical books and courses, it is not discussed or shown. I thought this engine was very well thought out.
I had a Puch 250 in early 70s. It had an automatic oiling system, which I thought was rare for something from early sixties.
Do a video,on the amazing rotary radial in the Adams-farwell cars. Some really original thinking.
the diverging part of the exhaust pipe resonator is the part that reflects the wave back up to the exhaust port. The diverging section slows the gas and the gas behind it hits the slow gas and makes the pressure go up. Bernoulli.
nope, the divergent part reduces pressure, increasing cylinder scavenging. the convergent part reflects the echo as a physical wave back to the exhaust port preventing fresh charge from escaping by increasing pressure.
dwell is the length of the chamber between the two cones, determining the time for the sound wave to return to the exhaust port. effectively tuning the pipe to certain rpm ranges
I thought I'd seen 'em all..... Wow!
As a child, i remember hearing my father and his friends talking about a DKW. They seemed to be superior at the time. A lot of good stuff was coming from Germany at that time.
I want a Garelli 350! 2 strokes are awesome period
"Fascinating, Jim."
This is the first i have seen this kind of motor
In my mind when seeing this
that singgle connecting rod with mode Y connecting rod, can be usefull for 4 stroke singgle rod with seperating 2 cylinder combustion chamber and share the same cam profile duratin and lift
Wow i had no idea these engine designs existed
Subscribed simply because you didn't put your face in closeup for minutes on screen but instead opted to stay in the margins and using loads of animations as content. I hate the "big face on a big screen staring at me" style that many channels use.
Many channels use that technique to avoid copyright when using images that they did not create.
My father bought a new Sears / Puch 250 in 1968 (but it was actually a 1967 model). Looked just like the one in the video. I ‘inherited’ it when I turned 16 (1971).
Sold it to a neighbor kid when I got a newer bigger bike. He wrecked it and I talked him into giving it back to me. Frame is long gone but I still have the engine.
Great memories!
Thanks for sharing this interesting design.
i really wanna see a 2 stroke twingle I4 or I6 for some reason
Someone looked at a single cylinder 2-stroke engine and thought to themselves "you know what this needs? More friction!"
A dual piston 4-stroke and you'll have the Alvar (from the first name of the inventor) engine which has the ability to do variable compression. The secondary piston don't have to be as large as the main piston.
If I turn this into a four cylinder (twin so 8 piston engine) and this is a twingle, because its twin-single, would the new engine be considered a twin-quad aka twad engine?
Excellent information. I never knew. Did wonder what a single cylinder twin was . Now i can go to my grave in the knowing of all knowledge 👍
This is brand new territory to me. Pretty cool! If I had been considering a design like that, I wouldn't have. It seems unnecessarily over engineered.
An even better solution is to combine uniflow scavenging with, y'know, exhaust valves. It solves a whole lot of problems. ;)
I thought the Isetta was a BMW250 single engine and similar to the R25 motorbike .
It was after bmw bought the manufacturing rights from iso, who designed the isetta.
At first I thought this was a 2 cylinder 4 stroke, with the cylinders 360° apart
I have a twingle motorcycle. It is a neat piece of machinery. When anybody sees it they are like what the heck is that thing?
Was hoping for MPG numbers of engine in the BMW
BMW Isetta hatte einen 1-Zylinder 4-Takt Motor... 😊
I know a motor mechanic who built one from a Yamaha rd 350 2-stroke.
He chopped the crank & had it welded checked & balanced. Ran nice, but it was no contest against a regular 350 RD. Fun project, still has it.
These engines are now collectible.
I have seen one open IN REAL LIFE with my own eyes, I could have even bought it, if I wanted, it was at historical bikes flea market/meet.
Can twingles be modernized?
That this engine "succeeded" might be a little optimistic and extends a bit too much credit for this engine.
Just because you can, doesn't mean you should.
Damn, never knew of these... Pretty cool little thing... Might make one at some point for a lawnmower or similar just for kicks... Shouldn`t be all that hard to make, not with the right equipment at least...
I have seen one open IN REAL LIFE with my own eyes, I could have even bought it, if I wanted, it was at historical bikes flea market/meet.
Here in Austria the Puch double Piston Engine was popular.
de.wikipedia.org/wiki/Puch-Zweitakt-Doppelkolbenmotor
Isetta micro car has an one cylinder 1 piston 350cc ohv valve engine BMW btw
This "conical exhaust" is what modelers call a "tuned pipe".
You could say the honda nr500 and 750 are sort of fourstroke twingles.
Triumph made one of this. I still have the engine someplace in the attic. Probably the worst 2-stroke I've seen. The flame front has to propagate very far to reach the other cylinder. The piston of the other cylinder (away from spark plug) got severely destroyed by the detonation.
Always heard them called split single.
As a kid I had a Sears 250, a twingle, it had the nastiest exhaust sound. Kind of a “blatt blatt “ sound. Maybe efficient but not a pleasant sounding engine.
A 2 stroke with a supercharger using the flywheel and crankcase for compressing the air?
I'm no engineer but what about using a bigger piston the area of those 2?
So you would have no wall in the middle and would be a normal 2 stroke.
Hm. Clever. Thanks
Just double the size of the piston and have a one banger! 🤔😉
No mention of intake reed valves ?
Hello, this video is focused on twingle engines. I have another video about 2-stroke engines, where its operation is shown in detail with all its options including reed valves. Thank you.
Surely a direct injection two stroke would solve all these problems. Were they ever made?
Yes. That's another reason why twingles are nonsense today.
EMD made millions of them, so, yes. To quote "History and Development of the 567-Series General Motors Locomotive Engine:"
"The basic 2 cycle engine design established at this time has been successfully used in the full line of Diesel engines built by General Motors and therefore has been applied to a great many of the Diesel engines in use in the world today. These have all been direct injection, uni-flow engines with air admitted under pressure supplied by the blower to the cylinder through ports in the cylinder liner with the piston acting as the intake valve. The exhaust valves in the cylinder head are open when the intake ports are open, allowing the fresh charge of air to sweep out the combustion products of the previous cycle. Valves and ports are closed at approximately the same time and the fresh air charge is compressed. Slightly before the top of the piston travel, fuel is admitted with very exact control by the unit injector and combustion occurs very near top center to allow full use of the developed power."
Split single
With the Isetta you're wrong. The Isetta has a 4 cycle BMW single cylinder engine. Two versions, 250cc and 300cc.
No. The iso Isetta has a twingle. You saw the car smoking and producing the sound of a 2 stroke. The bmw Isseta has a 4 stroke. The video perfectly clarifies that.
This is why elec motor is so simple compared.
You can have a 2 cycle engine that does not mix oil with gasoline.
Twice as much internal drag.
Why not just make a oval piston at that point
Sealing an oval piston is not as easy as it might seem. Soichiro Honda managed to do it later on. These were never considered to be race engines.
The key is the wall in the middle to create a "uniflow" scavenging.
Or why not just make a square piston 😄
The german name is Doppelkolben - Motor .
7:21 that has garbage primary balance. Its the secondary balance thats perfect.
And who is "lucas"??
Who is that weird man who shows up at the bottom?
Are you repman22?
si
The REAPAIRMAN has his pictures wrong in the thumbnail at the side. One of the views shows the Crank and gudgeon pin in a parallel configuration and the CUTAWAY view shows the crank at RIGHT ANGLES to the Gudgeon pin WHICH CANNOT BE AND CANNOT WORK. Maybe the REPAIRMAN is a DUD.
The engine behind me is the Yan Engines split piston engine. It has 2 connecting rods.
No no, this isn't the reaperman 🙂
What engine configuration haven't we tried! And yet, the whole world is stuck on the same every-other-stroke cam driven valve and spring design! Spock says this is illogical.
Usles
Sorry but I was clueless about this engine.
Puch motorbike
Puch wins.
6:10 - "pooch" motorcycles?! Sorry, but Puch is pronounced like "book".. not pooch.
People don't call them "Twingles" they call them Split-singles
I knew someone who restored one in the early1970s. They were certainly called Twingles by a lot of people.
Oh, no, no, no. We called them Twingles more than half a century ago, universally, and still do.
Twingle is better