Gunnstein Lye said:
> On Monday 01 March 2004 18:19, Andy Ross wrote:
> > There shouldn't be anything really weird about a paraglider. The big
> > differences from airplane behavior are due to funny mass distribution:
> > the engine acts near the c.g., but the lift and drag are rather high
> > above it. My guess this is the source of the original complaint. In
> > a YASim model, you could try playing with ballast tags to move the
> > default weight distribution around.
>
> I will have a look at it, thanks. Do you think YASim is better for this
> purpose? I would think so, since as far as I understand it uses the shape of
> the wing to calculate lift and drag.
>
>
> > This holds so long as the parachute stays inflated. Handling the
> > non-rigid behavior of a flopping chute is going to be hard, but that's
> > more of a failure mode than a flight simulation issue. :)
>
> Not necessarily. Controlled deflation is used as a way of controling the
> glider. Wingtip collapses ("big ears") reduce the glide ratio, which can be
> useful for landings, and B-stall allows you to descend vertically in a
> controlled manner.
>
> If I have full programming control of the wing shape, then "big ears" can be
> at least partially simulated. The drag effect of the collapsed wing tips
> would be difficult, of course.
This was the issue that made me first think that YASim might actually not be a
good choice for this application. Maybe others have an opinion on this before
Gunnstein goes too far in one direction?
Best,
Jim
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