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HHS81 / c182s

Cessna C182S (1996 model) for FlightGear
GNU General Public License v2.0
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Prop continues to spin very slowly after cut-off (without complex engine simulation) #578

Closed hbeni closed 6 months ago

hbeni commented 6 months ago

User reported Prop spinning very slowly after cut-off: https://forum.flightgear.org/viewtopic.php?p=420372#p420372

This also prevents the towbar from being attachable.

I noticed that I could not attach the towbar. Then I noticed that after engine shut down the rpm stays between 0.06 and 0.09. I think the towbar wants it to be less than 0.01 rpm. Wind: none International Standard Atmosphere It looks like only the C182's propeller doesn't want to stop completely. C172 and DA40NG stop fully

(Maybe related to #303, but probably not)

hbeni commented 6 months ago

AR-1 wrote:

Commit: 0c8f53a879c027463ae4bdae9e871f63601c1c6e

Options set in the launcher: --prop:/nasal/local_weather/enabled=false --metar=XXXX 012345Z 00000KT 19SM SKC 15/M99 Q1013 NOSIG --prop:/environment/atmosphere/is-isa=true --prop:/environment/weather-scenario=International Standard Atmosphere --timeofday=noon --prop:/scenery/use-vpb=false --prop:/sim/rendering/scenery-path-suffix[98]/enabled=false --prop:/sim/rendering/texture-cache/cache-enabled=false --disable-terrasync --disable-sentry --aircraft-dir=/home/daniel/myFGFSaddons/aircrafts/c182s --aircraft=c182s --airport=LSZG --parking-id=B5 --fg-aircraft=/home/daniel/myFGFSaddons/aircrafts

Steps:

  1. Run with cold and dark and then turn the engine with s key or first engine running and then stop it
  2. Propeller is very slowly turning at 0.06 - 0.09 rpm

Just tried to verify several times, at different weather settings. I can not reproduce this.

Compiled:    2024-03-30 23:27:20
fgmeta:      1d96655      origin/next (https://git.code.sf.net/p/flightgear/fgmeta)
flightgear:  0c8f53a87    origin/next (https://git.code.sf.net/p/flightgear/flightgear)
fgdata:      7ca3d6ca0    origin/next (git://git.code.sf.net/p/flightgear/fgdata)
simgear:     9751c6f1     origin/next (https://git.code.sf.net/p/flightgear/simgear)
hbeni commented 6 months ago

Investigation showed, that the "complex engine procedures" aircraft option is the difference. With it off, I can reproduce; it's enough to even start the propeller rotating by cranking when cold&dark.