Re: Ground limit and 3D model
Gerard ROBIN <[email protected]> Sat, 21 May 2005 14:07:31 +0200
| Newsgroups | gmane.games.flightgear.flightmodel |
|---|---|
| Message-ID | <[email protected]> |
Le samedi 21 mai 2005 à 13:16 +0200, Sam Heyman a écrit : > > Yes. The A320 features these : > > > > <UNDERCARRIAGE> > > AC_GEAR NOSE_LG 196.1 0.0 -138.2 100000 5000 0.8 0.50 0.02 > > STEERABLE NONE 5 RETRACT > > AC_GEAR LEFT_MLG 688.7 -144.4 -142.0 150000 12000 0.8 0.50 0.02 > > FIXED LEFT 0 RETRACT > > AC_GEAR RIGHT_MLG 688.7 144.4 -142.0 150000 12000 0.8 0.50 0.02 > > FIXED RIGHT 0 RETRACT > > AC_GEAR TAIL_1 987.0 0.0 -55.7 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR ENG_1 515.4 226.2 -104.3 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR ENG_2 515.4 -226.2 -104.3 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR WING_TIP_1 846.1 -667.6 -37.4 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR WING_TIP_2 846.1 667.6 -37.4 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR NOSE_TIP 0.0 0.0 0.0 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR NOSE_TOP 131.6 0.0 92.6 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR TAIL_TOP 1382.6 0.0 340.0 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > AC_GEAR TAIL_TIP 1476.7 0.0 58.9 1500000 60000 0.2 0.2 0.02 > > FIXED NONE 0 FIXED > > </UNDERCARRIAGE> > > > Cool I get the idea... it makes sense! > > The only problem is that I am modeling an RC aircraft weighing 6.5 kg > and 2.2m span. Any idea what the spring constant and damping > coefficient of the wing tips and tail skid could be? > My under-carriage has a spring constant of 20 and a damping > coefficient of 10 (from a quick differential equation calculation). > An average calculation coming from Aeromatic gives the following result: 4.3 1.4 for nose gear 14.3 2.9 for main gear left 14.3 2.9 for main gear right Aeromatic is a tool you can find in: http://jsbsim.sourceforge.net/ -- Gerard _______________________________________________ Flightgear-flightmodel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-flightmodel 2f585eeea02e2c79d7b1d8c4963bae2d