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P3D v4 Prop 'spool down' instead of sudden stop? How?

lionheart

lionheart

Messages
10,088
Country
us-arizona
Hey all,

How can I slow down the 'engine off' RPM of a propeller?

Another words, a Cessna 172 will shut off from idle and the prop stops in about 1 to 2 seconds. A turbine turboprop will slow down or spool down and take perhaps 20 seconds to a minute to spool down. Is this adjustable? Can I do this with a 6 cylinder engine?
 
Roy Holmes

Roy Holmes

Resource contributor
Messages
1,803
Country
us-virginia
Bill,
I'm not sure what you are asking for here.
A piston engine will slow down quicker that a turboprop because of cylinder compression applying a braking force which the turboprop does not have.
Roy
 
bstolle

bstolle

Messages
108
There are quite a few items which affect the shut down timing but the 'dedicated' one is table 509 where the description says: low end affects how fast prop stops.
 
DragonflightDesign

DragonflightDesign

Resource contributor
Messages
1,092
Country
northernireland
I think
Code: 
[propeller]
propeller_moi= 150        //Propeller moment of inertia
section in the aircraft.cfg file may have something to do with it too. At least, the props on my Wright Cyclones take a (sometimes frustratingly) long time to stop and we haven't messed with the FD (yet...).
 
lionheart

lionheart

Messages
10,088
Country
us-arizona
Man, that worked brilliant. Tuned it in at 30 and it spools down excellent and realistic.

Thanks guys.
 
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