"Bill Daniels" bildan@comcast-dot-net wrote:
High brightness LED's are a really simple idea. Some tuggies could
use them as turn signals.

What if the tow pilot is also one of those automobile drivers who manage to
leave their turn signals on long after they've made their turn? ;-)

Some silly ideas:

Since the aircraft are attached anyway, one could just wrap the tow cable
with a couple strands of wire and rig things so the tow pilot can press a
button to zap the glider pilot, alerting them to check the spoilers.

An aft facing bull horn on the tow plane rigged so the tow pilot can speak
directly to the glider pilot sans radio ... and everyone else within a half
mile. :-)

Hey, there are such beasts:
http://www.npr.org/templates/story/s...toryId=9501416

"CAP will be using their new Airborne Public Address System which was
primarily designed for Tsunami warning and relief operations along the
Oregon Coast."
http://www.salem-news.com/articles/a...cap_041008.php