Serge said... Mark, you battled to find a spring that would fill the box and help with the heat transfer. My solution will be to close the box both sides, let the air in through plenty little holes. For a spring, I will use stainless steel scrubs (sold in France in any convenience store, that are use to scrub pots and pans), and pack them inside the box before I close it.
Serge, I think you're overdoing it... You'll insulate the exhaust pipe too much, and probably get excessively hot air. The "screen door spring is old practice, and should be easy to do. Stretch it, wrap it, tie with a bit of stainless safety wire, and go fly. Most people use aluminum for the outer wrap, and it's easy to do. Ron Freiberger mail to [email protected]
