Hi Gijs, Gijs de Rooy schrieb am 18.12.2007 22:09: > Hi folks, > > I did a lot of work last week on a pushback truck model. > The model is done, the steering is working (could be better) > but we still need the possibility to push/pull planes. > > Please see the forum page for some more info and screens and a > download link: http://www.flightgear.org/forums/viewtopic.php?t=734 > > I think this option is possible with the aerotow function. I can't > do it myself, so I would ask if there's somebody who'd like to > help me with this. Please contact me. Yes, in principle it is possible with the aerotow feature. The only problem is, that due to the time lag of the MP protocol, some elasticity of the tow is needed. With a 60m tow this is possible without looking unrealistic, but we should try to to that with the existing code.
1.) Copy the aerotow part of the fdms .xml file and of the -set.xml file of an glider (bocian or ask21) to the airliner, the position should be the nose wheel. 2.) Copy the aerotow part of the dhc2w (.xml and -set.xml) to the truck. The position should be the end of the push-bar. 3.) Change the parameters of the tow length (length, min-tow-length and initial-tow-length: much shorter, maybe 5m) and increase the break-force. Maybe you need to modify the elasticity (elastic-constant). (these parameters need only to be changed at the airliner; the tow truck will copy these values automatically) If I remember correctly, the airliner will use the center of the tow truck for calculating the distance (and the forces). With 60m tow you would not see a difference, but for the push-truck this could be visible. On the other hand, we maybe need this distance between the truck center and the end of the the push bar for the elasticity. Just try it as it is and if it works, but the distance between truck and the airliners front gear can not be adjusted by modifying the elasticity and tow length, then you need to shift the truck center a bit. > > Some of the things I think we need: > * The pilot of the aircraft has to accept the pushback to push the plane. The same as we have in aerotow. The glider pilot connects ... > * The pilot should be allowed to disconnect at any time. and disconnects (the dhc2w pilot can only disconnect). > * There should be an chat interface between the pilot and the pushback > truck driver. > > That last one is already possible with the new version. > > Cheers, > > Gijs > > Regards, Maik ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
