This product, readily available in refrigerant and air conditioning supply stores seems to be promising. Am planning to build the fuselage out of them for some of my SPAD's. They need to be strengthened with light wood spars / rods to ensure rigidity. Would be GREAT for glider fuselages, I think. Anybody experimented with them? Please advise and enlighten...........

Cheers!

VC

I always wondered what these pipes are called. I have seen them between the AC indoor unit and the outdoor unit. Must be cheap and effective material for building planes.

For our information, there is a not so common (an possibly very expensive) material called Aerogel (Solid smoke). This material is incredibly light and has good heat insulating properties. May be used in special application. One of my colleague had a small piece of it and it felt funny and more like depron. It might require reinforcement for building. However, I think this is the ultimate material for micro airplanes.

More on Aerogel:
http://en.wikipedia.org/wiki/Aerogel

BTW, this material was used in NASA's Stardust mission to capture particles from a passing comet.

-Ismail