On Saturday 23 Jan 2010, Pete Morgan wrote: > After following the link below.. here is the fix. Not sure what > it does, but took a stab at replacing the ax=13.6. The model > looks fins in the views.. > > +++ b/787.xml > @@ -55,7 +55,7 @@ Mach 1 = 576.6 kt @ 35,000 ft --> > width="5.9" taper="0.62"/> > <fuselage ax="16.0" ay="0" az="1.4" bx="-13.6" by="0.00" bz="1.4" > width="5.9" taper="1.0" midpoint="0.4"/> > -<fuselage ax="-13.6" ay="0" az="1.4" bx="-13.6" by="0.00" > bz="1.4" +<fuselage ax="13.6" ay="0" az="1.4" bx="-13.6" > by="0.00" bz="1.4" width="5.9" taper="0.1" midpoint="0"/> > > <fuselage ax="8.3" ay="9.65" az="1.1" bx="-1.8" by="9.8" bz="1.1" > > > Would be nice if someone could commit this so the 787 doesnt > crash at startup > > Pete :-)
It looks as though the 787 author was trying to model a complex fuseage shape; in the old 787 YASim config I have there are 6 different overlapping fuselage elements (plus another two for the engine nacelles), the one that you've changed indeed having a zero length, hence the error message. Even then though, the total fuselage length seems incorrect. The most forward fuselage element starts at 25.91 metres (ax=25.91) and the most rearward element ends at -13.6 (bx=-13.6) giving a total fuselage length of 39.51 metres; a 787 (-3/-8) fuselage should be 56.7 metres long. Having experimented with using multiple fuselage elements like this, I came to the conclusion that it didn't actually offer any benefits (and neither did defining the engine nacelles, which isn't too surprising as the air flows through the engines nacelles and not around them). So assuming the the nose of the 3D model is located at 25.91 metres (and not at 0.0 in accordance with the standard FG Visual Refrence Point) then a single fuselage element with ax= 25.91, az= 0.1 and bx= -30.79, bz= 1.4, and with a taper of between 0.3-0.5, should be about right. However, simply doing this is likely to change the YASim CoG because it distributes the total aircraft weight according to the various element definitions. LeeE ------------------------------------------------------------------------------ Throughout its 18-year history, RSA Conference consistently attracts the world's best and brightest in the field, creating opportunities for Conference attendees to learn about information security's most important issues through interactions with peers, luminaries and emerging and established companies. http://p.sf.net/sfu/rsaconf-dev2dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
