> -----Original Message-----
> From: AJ MacLeod [mailto:aj-li...@adeptopensource.co.uk]
> Sent: 29 June 2011 12:51
> To: FlightGear developers discussions
> Subject: Re: [Flightgear-devel] A couple of random oddities
> 
> On Wed, 29 Jun 2011 10:39:55 +0100
> Vivian Meazza wrote:
> 
> > > * English Electric Lightning: I believe the plane should be able to
> reach
> > > Mach 2 around 36.000 ft in level flight - even in a descending
> pattern, I
> > > was never able to reach above Mach 1.7 - is there a problem with the
> FDM?
> > The author is inactive at the moment. Perhaps he can be persuaded to
> give
> > this fine model a bit of a work-over.
> 
> The author is a bit too active, which sadly doesn't leave any time for
> Flightgear :-(  The instruments I'll try and fix myself, but do any JSBSim
> experts have any ideas on what might have changed the behaviour of the FDM
> model?  It worked OK "before"... though I have no idea when that changed.
> 
> Cheers,
> 

Good to see that you're busy in RL, but not too busy to ignore FG
completely. I've just pushed Ron's update to the JSBSim config. It needs
quite a bit of up-elevator trim to maintain the cruise at 36000 ft, so there
might be something else not quite right, but it will do M2.0 at 36000 ft.

Regards,

Vivian



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