V.Zhyhulskiy. Po-2

Having in the last few days rediscovered this aircraft I have realised why I gave up on it so many times. Can anyone please explain why, after a few minutes flying, the engine cuts out and will not restart?

SJS,
I was going to be 'funny' and say you run out of fuel...but I won't..

Bob Chicilo did a flight dynamics update (attached), that may do it. There could be many reasons, I doubt it's the flight height you're flying at, but if it a manual mixture engine then maybe, or it's how you've got your Fs9 set up, that the Po doesn't like. Try this update, see. If not, swap out the airfile for another (any), if that's ok, then it's the Po's airfile that has an issue, if no change then it's the aircraft.cfg issue. Or, If you know how, you can then change out the ac.cfg for another (you'll have to change the ac info etc), and if that works then it's an airfile issue.

Cheers

Shessi

Thanks Shessi, I'll give it a try and report back
David

I once had a similar issue and found the engine would start from the VC but not from the 2D panel, even though both had the same gauges. Never deciphered why, just made a mental note to always start from the VC.

"Borrowing" an aircraft.cfg sounds daunting, but it mostly isn't.
Start with a similar aircraft that you know is good. Rename your "bad" cfg file to something you'll recognize. I use aircraftO.cfg.
Copy everything from above (and including) the [General] section of the "bad" cfg and replace all that data on the "donor" cfg file.
Next, find the [Contact_points] section in the "bad" cfg and copy all of that. Again, replace the contact points on the "donor" cfg.
Next, find the [Views] section on the "bad" cfg including the "eyepoint=" line and replace that data on your "donor" cfg.

At this point, you're ready to test out your new cfg file. If the problem is still there, you'll need to swap-in the .air file from your "donor" aircraft.
Don't rename the "donor".air file just yet. Just change the "sim=" line of one of the [fltsim.X] lines to the new .air file. You also may want to highlight the new .air file then right click and select "properties". You'll see the name of the .air file as Windows sees it. Highlight the name and COPY/PASTE that name to your "sim=" line. Some .air files can use "-" and "_" combinations along with capital and lower case letters that will drive you nuts.

It sounds like you have a classic "dead battery" problem except that shouldn't shut down the engine. If your plane is using "hybrid" flight dynamics, almost anything is possible. It might be as simple as adding a generator switch to your 2D panel. Try swapping in a better aircraft.cfg and see how that works. At most, you'll need to make some small edits to the gear height in the (Contact_points] section. Once you have the problem fixed, you can try swapping in engine data and drag/lift data from the old cfg file but work in stages and keep testing.

I had the same thing happen with the Belov version.

I added this to the "fuel" section per the SDK:

engine_driven_pump = 1

Let us know if it worked with Vlad's bird.

Saludos!

Jorge
Miami, FL

Gentleman,
Many, Many thanks for your responses and suggestions, all of which I have experimented with using various permutations. However, believe it or nor, I appear to have solved the cutting out issue by simply dropping the engine revs by 4-500 once airborne with only an imperceptible loss of airspeed. It will stand occasional bursts of full throttle but on slightly reduced revs will fly all day long.
Once again, thanks for the input
David

Ah, yes. The Belov model also has to be carefully managed with regards to the revs. The oil temp will skyrocket fairly quickly with the throttle at full, and you'll eventually "cook" the engine if you're not careful.

The engine driven pump "fix" also helps, even if not "real" with regards to the engine.

Saludos!

Jorge
Miami, FL