Eric Greenwell wrote:

I'd like to replace my current digital camera with one better suited to
pictures from my glider, but I'm having difficulty finding one with the
features I want.

You'll have to check many different tipes on dpreview.com
It will take a long time...

I suggest you check:
Nikon 8400, 8megapix, zoom 24-85mm
Canon S80, 8MP, zoom 28-100mm
Canon S70, 7MP " " "
Canon S60, 6MP " " "
Minolta A200, 8MP, zoom 28-200

and probably many others.
The latest prosumer is the gorgeous Sony dsc-R1 (10MP, zoom 24-120),
buti it won't pass through your canopy window for hand-held shots from
outside.

Aldo Cernezzi