Cessna 172 not switching off despite fuel cutoff, engine turned off and mixture at 0%

Bug Reporting Hub Aircraft & Systems
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1

Hi there,

Thank you firstly for the awesome work!

I noticed in the latest update that the Cessna 172’s engine continues to run despite turning off the engine, fuel cutoff and mixture at 0%. I thought that it may be feathering but the engine sound is still on. Increase of throttle in this state does nothing, so technically the engine is “off” but still on.

The engine only cuts off upon landing.

Thanks

2

What you are describing is known as the propeller ‘windmilling’ (ie: turning in the airstream, even though the engine is not running.) This is realistic behaviour above a certain airspeed. It should stop windmilling a few knots over the stall speed (I forget the exact speed.) We tested this in the beta with the C172 G1000 version (that received the updated ‘CFD’ modelling.)

3

Hi, thank you for the response. This would make sense if there was no engine sound, which there is. Unless the windmilling still causes the engine to “run”? If so then I guess not a bug.

Just read up on it - interesting to learn about it

4

If you turn off the magnetos or pull the mixture all the way out the engine should be ‘running’ in the sense it is generating any power, but if it is windmilling the whole thing is still turning. So it will make some noise, but less noise.

5

I take it you are shutting the engine down in flight. IRL not a real good idea. Also the 172 prop is a fixed pitch unit & does not have any feathering facility.

6

Closed as solution was found.