On Mon, 2009-01-26 at 21:40 +0100, Erik Hofman wrote: > Durk Talsma wrote: > > Given that we are taking this route now, FlightGear CVS is, I guess, > > cleared > > again for major and somewhat more risky commits (JSBSim sync, etc etc). > > Alright, I've updated JSBSim now, including a number of engine files. > The following files might need some attention though, since they are not > in JSBSim CVS: > > A6M2/Engines/CS-40B.xml > an2/Engines/ASH-62IR.xml > Boeing314/Engines/WrightGR-2600.xml > c150/Engines/eng_O-200.xml > C684/Engines/6Pfi.xml > dc6/Engines/eng_R-2800.xml > DR400/Engines/Lycoming_O-235-L2A.xml > Dragonfly/Engines/Rotax582.xml > ercoupe/Engines/c-75-12.xml > flash2a/Engines/503.xml > Noratlas/Engines/MarboreII.xml > ogel/Engines/200hp-jsbsim-2.0.xml > P-38-Lightning/Engines/Allison.xml > SenecaII/Engines/tsio360eb.xml > Skyranger/Engines/rotax.xml > Storch/Engines/Argus_As_10.xml > ZivkoEdge/Engines/io540.xml > > Erik
The effects I'm anticipating are: A change in idle level. I expect <minthrottle>0.2</minthrottle> will work the best, as this is the aeromatic default I hope most engines will work just fine. A possible decrease in max power for engines specifying a <BSFC> tag with a max manifold pressure less than 29.9. The new carburetor code takes <maxmp> into account, whereas the old code did not. Right now you may specify a maxmp greater than 29.9 to have the model calculate a bsfc setting for boosted engines, but the old "fake boost" mode is disabled. So engines will need a boost section to achieve the higher manifold pressure. A simple onespeed supercharger example is shown below: <numboostspeeds> 1 </numboostspeeds> <ratedboost1> 8.15</ratedboost1> <!-- 46.5 inHg --> <ratedpower1> 1900 </ratedpower1> <!-- Horsepower --> <ratedrpm1> 2600 </ratedrpm1> <ratedaltitude1> 0 </ratedaltitude1> To calculate the ratedboost number: Take your max boosted manifold pressure minus 29.9 46.5 inHg - 29.9 inHg = 16.6 inHg Multiply the result by 0.491 16.6 inHg * 0.491 = 8.15 psi Ron ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
