On Wed, 7 Mar 2007, Ron Jensen wrote: > I hand massaged the pitch to 17/32 as in the original file, and I > lowered the diameter from 141.7 to 132 because it wouldn't start with > 141.7 as a diameter.
That (132in) is the correct diameter for the AV-2 propeller. (132 inches or 3.35 meters) Source: http://www.vectorsite.net/avan2.html But there's supposed to be a gearbox between the engine and propeller on the AN-2 versions with AV-2 propeller. And the AV-2 is not a constant speed propeller, but a plain variable-pitch design. (ibid.) I sent this patchlet to Yuri (the author) in november last year: an2/Engines/AV-2.xml: - <minrpm> 400 </minrpm> - <maxrpm> 2500 </maxrpm> + <gearratio> 1.38 </gearratio> minrpm/maxrpm are for defining a constant speed propeller. (There is a bug in aeromatic.) For a manually variable pitch propeller, these should be left unset. And <gearratio> isn't generated by aeromatic either. (I dont' know if Aeromatic has been fixed sinced that. Haven't checked.) Then there were also some problems with hard-coded idle rpm limits in JSBsim. This was discussed on the list when the aircraft model was introduced last year (in november). ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
