"Frank van der Hulst" wrote in message
...
Yeah. I wonder whether head movement would produce enough power... like
the 'self-winding' watches of the 1970s.

Probably not, but you don't need a lot. I guess it depends on how long you
need it to operate. Using modern digital amp chips (which are amazingly
efficient), you can keep consumption down. A couple of gumstick batteries
might be alright.

Not necessarily... I guess you're talking about a metal firewall
shielding the signals, right? But, assuming a fibreglass cowl, mount a
self-powered repeater someplace where the engine instruments can see it,

That kinda goes against my "as few possible components between the source
and the destination" philosophy. I think you'd have to just locate the
receiver on the firewall and put an antenna through.

Yeah, I know that none of these things is quite right, right now.

If you don't keep working through the possibilities, you might miss an
opportunity to invent that new gadget that everybody just has to have.
Personally, I'm not hopeful that there's a big opportunity for blue tooth on
home-built airplanes, but there might be a couple of really good
applications.

Pete