Yak 54 M14PF engine start-up and take-off POV
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- čas přidán 7. 09. 2024
- Starting the Yak 54's M14PF radial engine is a bit of a workout . A lot of blades need to be pulled through to ensure there is no residual oil left in the lower cylinders and it involves a lot of priming to ensure a combustible mixture is present. On top of that it needs pre-heating during winter time..
Nevertheless every time it finally rumbles into life it is worth it! ;)
The reason for this meticulous procedure is the starting system. The starter is driven by pressurized air, however to save weight the Yak 54's pressure bottle is minimal in size. In result you only have 1 -2 very short attempts before the system would need a refill from an external source and that's why you want it to be able to start immediately.
After all that work, I would be too exhausted to fly. Phew!
Пилот устал, прокручивать винт - а завелся с пол-пинка!!! Спасибо вам, немцы, большое спасибо ! - за сохранение советских самолетов!!!
физкультура залог здоровья :)
Man you pull it through an excessive amount of times but I guess if it works for you then good.
so cool man shes gorgeous and a workout
чтобы на спортивном облегченном пилотажном самолете полетать ...немножко фитнес не помешает ! дядь зато с первого завел !!!!
Hi good man! would you answer my question briefly if you have some time please? but don't worry i won't ask you why you sit on the back sit. how radial engines oiling or lubrication system works? and most importantly- during operation, how the oil is kept from being accumulated in the lower cylinders? i like your explanation about why your preparation is important before starting and i hope you will answer my question and show me some links or materials in this area because i can't find any.
Do all the Yak 54's M14PF radial engines run clock-wise? It adds different torque from what I thought was normal.
Everything Russian generally runs opposite of western stuff. So yeah it’s left pedal to counter torque. That would be an adjustment for me since the last prop I flew was an 1100hp T6b.
Pulling the prop on one blade and so far outboard of the spinner puts a lot of stress on a very expensive MT propeller. I pull my prop from two blades at a time using one hand on each blade and much closer to the spinner. It gives me more of a workout, but is much easier on the prop. Not telling you what to do, but might want to consider it? Beautiful airplane btw! What is your dry empty weight btw?
What he was doing does not do any harm the the prop and is the recommended technique.
That is ridiculous, it will not harm the prop even one bit. Infact what you say you do sounds dangerous. I pull my plane through with the idea it is going to try and start like you should.
That makes zero sense. The torque is exactly the same. Just the effort changes.
Летать будет тепло .
Love the YAK! Do you have a Guesstimate how many torques the M14PF puts out? Ive searched all of the internet with no luck. My guess that an engine of that size must produce quite a few torques..? Cheers!
approx 1500 ft/lbs
flying enclosed in that canopy would be a pain.. i wonder if it can be partially open in flight? must get dreadfully hot and fatiguing in there
It can be open on the ground but has to be shut in flight. However it has a pretty efficient small vent that provides plenty of fresh air as soon as the aircraft is moving.
ok thanks
Is it in EDLE?
What's the purpose of hand propping the radial when U have a starter motor? Sounds really dangerous, even if it doesn't have a starter motor.
The main reason is that with this engine it is necessary to prevent hydraulic lock. Residual oil will accumulate in the lower cylinders when the aircraft is parked. By opening the drain valve and pulling the prop by hand for a couple of cycles the oil is removed. This cannot be done with the aircraft's starting system because it is too powerful and the engine would be damaged if enough oil has accumulated.
A nice side effect is that this procedure helps to prime the engine properly. The starting system relies on pressurized air and the reservoir is very small (2-3 start attempts to empty) so it is important to get it right.
YakFiveFour Wow I didn't know all that until now. Thanx 4 the info.
Over here in the States they make a scavenge pump kit which pumps out the residual oil from cylinders # 5, and 6. Shutdown procedure includes turning this pump on after shutdown. I've also added it to my pre-start checklist. I still must cycle the prop however - that's the only sure way to make sure there's not a hydraulic lock waiting for you.
настоящий мясник !
Why the PIC sits in the back ?
Hi Felix, PIC in the back is the standard configuration of this (and many other) aerobatic aircraft.
In the back seat it is easier to feel what the tail is doing, which is critical in any tail dragger but especially this airplane. Also, visibility is slightly better. From the front seat, you can't see any part of the runway as the pavement approaches during landing. From the back, you see the pavement appear (to an extent) in your peripheral vision as you're close to touching down.
It was said Russians build aircraft like tractors for lower maintenance. I believe that claim now
Why you use the back seat?
Hi Vince, the Yak54 is designed to be piloted from the back seat. The front seat is just for passengers or instructors.
Oh Thank you for that answer
Start of USA engine. Rotate prop few times and push start button and go flight. Start of Russian engine: rotate prop fea times, prime, rotate prop fea times, prime, rotate prop fea times, prime and start engine. If it will not start, do all next time. After 15 minutes of flight you need to spend more than 1 hour by cleaning engine, cownlings and rest of plane from huge amount of oil. This is reality of flying with this Russian aerobatic planes. This is reason why best aerobatic pilots in Russia switch to Germany planes with USA engines.
"Start of Russian engine: rotate prop fea times, prime, rotate prop fea times, prime, rotate prop fea times, prime and start engine. If it will not start, do all next time. After 15 minutes of flight you need to spend more than 1 hour by cleaning engine, cownlings and rest of plane from huge amount of oil. "
You say that like it is a bad thing. 🙂 You forgot to mention they consume a quart of oil in the process
Too much work. I would rather stick with Lycoming.
No character to them or continentals though
Everyone want to fly with Lycoming instead of this. Because with Lycoming you can fly. With Russian engines you have 1 hour of cleaning and servise after every 15 min flight.
Are the prop spins priming fuel or oil?
Turning the prop over after the fuel prime shots distributes the fuel to the cylinders to prime the engine for start. Initial prop turns are to check that the engine is not hydraulic locked.