There's nothing there about snap rolls. Can you copy / paste
here?
Jon
-----Original Message-----Sorry about that, prematurely hit send. Here is the link:
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Hugo Vincent
Sent: Wednesday, June 14, 2006 8:44 PM
To: FlightGear developers discussions
Subject: Re: [Flightgear-devel] Aerobatics using flight gear and JSBSim
http://forums.x-plane.org/index.php?showtopic=13050&st=0
Might be interesting, or maybe even relevant to modelling things like snap rolls in JSBSim.
Regards,
Hugo Vincent.
On 6/15/06, Hugo Vincent <[EMAIL PROTECTED]> wrote:I came across this discussion about adding a new open source FDM to
X-Plane, using CFD methods to get really really high fidelity models.
On Wed, 2006-06-14 at 20:32 -0500, Jon S. Berndt wrote:
> Snap roll:
>
> This is indeed the recipe for a snap roll: starting from a speed slightly
> above the stall, apply a sudden yaw with the rudder, apply opposite aileron,
> and pull back on the yoke. SNAP! --- One wing stalls and the plane rolls
> over.
>
> [I liked the clever use of the word, "recipe" with the phrase "snap *roll*"]
>
> This would be hard to model using lookup tables, but it might be possible
> using JSBSim functions and a table or tables, together. Could be fun. I need
> to think about this one. The first idea that comes to mind is that if the
> aircraft speed minus the yaw rate times some characteristic lateral length
> (span/2?) falls below the stall speed, then a rolling moment would be
> generated - maybe a yawing moment, too.
>
> Jon
>
>
>
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