[simpits-tech] A-4 website updated again

[Sean Galbraith]

> > Biggest problem I have is the moment-arm, since it will be pivoting from
> > the rear.  I will most likely go with a fabricated aluminum frame with
> > stretch formed plexi over that (probably 1/8") to get the nice complex
> > curve into it.  I have thought about building the curved sections out of
> > laminated 1/8 MDF with ali strip outers, but that was not rigid enough.
> > Lucky for me one of my ex co-workers now runs a boat building yard, and is
> > a pro at aluminium fabrication ;-)
>
>I'd go with glass over foam. Light, handles compound curves easily, and
>easier to bend foam than wood. You could even just tape off the edge
>where the frame will sit, hose it down with spray foam, and sand it to
>shape. When it looks right, glass it with 2-3 layers of 5 or 6 oz. glass
>and you're pretty much done. With spray foam you can even use el cheapo
>polyester resin (aka Bondo).
>--
>Steve

Jeez Steve!  I hadn't even thought of glass!  I know a fiberglass guru who 
wants me to build him a sailplane pit too ;-)  Gotta love the 
favour-exchange doncha!

Sean.