I'm figuring that the main difference is what variables are available for use. If you have a recip engine, then the turbine variables are useless, for example.What I'm wondering is: a) What variables does the type 3 helicopter use. :( Is there an advantage to using this type vs. turboprop?Anyway, hope some light can be shed.Thanks

better ask atAir File Board, post March 2003http://www.avhistory.org/scripts/MegaBBS/logon.aspI think there is a helicopter section.Ian