Hi Vivian, Vivian Meazza schrieb am 06.01.2008 01:01: > Maik Justus wrote: > > > >> Hi Vivian, >> Vivian Meazza schrieb am 21.12.2007 00:11: >> >>> Christmas has arrived slightly early! I've got something which: >>> >>> A. runs >>> >>> B. looks OK with limited testing >>> >>> The ballistic object aligns with the direction of flight in >>> >> pitch and >> >>> heading with an external force applied. It would be >>> >> possible to align >> >>> it with the direction of the external force, but I think that would >>> need roll as well. I'm not sure which one would look best. >>> >>> The external force is defined in terms of: >>> >>> Magnitude (lbf) >>> Azimuth (deg, North = O) >>> Elevation (deg, up = 90) >>> >>> In a user-defined property. Of course, some external >>> >> program needs to >> >>> set the external force data. >>> >>> This all now needs testing in a more realistic environment. I'm not >>> totally convinced that the ballistic object won't disappear into >>> space/to the centre of the earth, or oscillate like a >>> >> deranged spring. >> >>> Vivian >>> >>> >> Thank you for the enhancement of AIBallistic. The external load works >> here, but not perfectly. I need to limit the force to approx >> 1000 lbf >> (which is not enough to simulate it properly). If I do not limit the >> force, the load (the 3d-model) disappears, but it is still in the >> property tree and reacts on forces (maybe not correct, not >> sure, but it >> is still there). Any idea, what could cause this? >> >> > > Hmm - the mass of the load in load_demo is only 170 lbs - applying 1000lbf > could well send it into orbit! Note your mass is in slugs, and you need a > realistic Cd and eda. I _think_ the math is correct, but I'll look at it > again > > Vivian > > Sorry, I limited the force to 1000N (about 200lbs). 200lbs are enough to lift the load. Lifting works. Therefore the math itself is correct. But something strange happens, if I do not limit the force. (and sometimes forces greater than 200lbs are needed.... )
Maik ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
