Sorry to respond to myself, but wanted to add some detail: Mass Properties Report (English units: lbf, in, slug-ft^2) Weight CG-X CG-Y CG-Z Base Vehicle 1500.0 41.0 0.0 36.5 0 Pilot 180.0 36.0 -14.0 24.0 1 Co-Pilot 0.0 36.0 14.0 24.0 2 Left Passenger 0.0 70.0 -14.0 24.0 3 Right Passenger 0.0 70.0 14.0 24.0 4 Baggage 0.0 95.0 0.0 24.0 0 Fuel 100 56 -112 59.4 1 Fuel 100 56 112 59.4 Total: 1880.0 42.1 -1.3 37.7
The CG-X arms should match what's in the TCDS and POH. The propeller file also does not match between JSBSim and FlightGear. JSBSim has the same tables, but they were commented out and replaced with new tables. Using a script I wrote to simulate a softfield takeoff technique[1], I see the following: datafiles as they are in FGDATA: Flaps 0% Time Speed RPM Height Event (s) (knot) (ft agl) 0 0 1900 0 Brake Release 11 40 2332 0 Rotation 17 59 2430 0 Lift off 22 71 2525 8 32 83 2621 84 456 fpm Flaps 30% Time Speed RPM Height Event (s) (knot) (ft agl) 0 0 1900 0 Brake Release 11 40 2330 0 Rotation 17 58 2423 0 Lift off 23 67 2500 14 33 75 2565 90 492 fpm Using JSBSim's IO-320 and Propeller Flaps 0% Time Speed RPM Height Event (s) (knot) (ft agl) 0 0 1900 0 Brake Release 9 39 2500 0 Rotation 13 58 2600 0 Lift off 23 84 2800 50 Engine over red-line 33 98 2875 200 900 fpm Flaps 30% Time Speed RPM Height Event (s) (knot) (ft agl) 0 0 1900 0 Brake Release 9 39 2500 0 Rotation 12 53 2600 0 Lift off 18 70 2680 15 23 77 2800 130 Engine over red-line 33 87 2830 216 516 fpm [1] The aim of the script was to get off the ground asap then lower the nose to gain airspeed. It does not try to establish a best climb speed. ------------------------------------------------------------------------------ Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel