On Fri, 2003-01-10 at 12:20, Arnt Karlsen wrote:
> On 10 Jan 2003 08:42:13 -0800, 
> Tony Peden <[EMAIL PROTECTED]> wrote in message 
> <[EMAIL PROTECTED]>:
> 
> > On Fri, 2003-01-10 at 07:30, Curtis L. Olson wrote:
> > > Matthew writes:
> > > > Wing flexing? Is that possible in FG? Keep going this way and I
> > > > might need to replace my Geforce 2 GTS 32MB card with something
> > > > new, if its worth it(seems to be still perfoming really well
> > > > though). Would be cool to see wings flex when taking off, or with
> > > > turbulence etc.
> > > 
> > > Have a look at the Wright flyer in FlightGear.
> > > 
> > >    fgfs --aircraft=wrightFlyer1903
> > > 
> > > The wing flexing isn't perfect, but it shows that it's possible and
> > > with a bit more work, could be made a lot smoother.  This could be
> > > very interesting to attach to some internal FDM variable for the
> > > much larger aircraft ...
> > 
> > Already one there ... normal load factor or nlf.  This is basically
> > lift/weight so when it's zero the wings are unloaded.  One is
> > lift=weight, so the wings should bend to their normal, one-g shape.
> > Greater than one, and you're pullin g's, so the tips should bend up
> > to varying degrees depending on the aircraft and load.
> 
> ..we _could_ interface with http://felt.sourceforge.net/ .  ;-)

In real time? I don't think so.  One possibility, though, is to do 
the analysis offline and generate tip deflection as a function of
load factor, however.  
> 
> > BTW, it's a wee bit scary to see just how much high-aspect ratio
> > wings will bend up when pulling more than 2-3 g's.
> 
> ..possibly another reason for the size of airliner "windows".  ;-)
-- 
Tony Peden <[EMAIL PROTECTED]>


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