Simple solution to hot tunnel

[jor.ezq]

Hello, Just to show you people, my solution to the hot tunnel issue,
After 100 hours flying with the problem,I riveted an stainless steel skin to the belly with a fiberfax sheet between with amazing results
Here you are some pictures
Jorge
Buenos Aires

[RVFan671]

What thickness was the fiberfrax you put under the stainless?

[DanH]

Originally Posted by jor.ezq

Hello, Just to show you people, my solution to the hot tunnel issue,
After 100 hours flying with the problem,I riveted an stainless steel skin to the belly with a fiberfax sheet between with amazing results
Here you are some pictures
Jorge
Buenos Aires

That's the right idea.

Jorge, can you put some numbers to "amazing results"?

[jor.ezq]

Originally Posted by DanH

That's the right idea.

Jorge, can you put some numbers to "amazing results"?

Dan, first, let me tell that my solution was inspered in yours, so thanks.

Well, honestly, I didn´t measure the temperature before adding the isolation
nor after, but the difference is really very, very notorious. I can say at less 20
Celsius degrees less ( around 68 Farenheit less),
It seems that almost all hot air flowing from the engine and the exhaust pipes, not ¨attack¨ the first 20 inches of cabin floor and that made the difference.
The fibrefax I put is 1/8"
In addition, I wrapped the exhaust pipes with a isolation tape
regards
Jorge

[oren_rokach]

Thanks a lot for sharing Jeorge!
noted! and most probably will follow.

[leok]

I installed a high flow fan at the front of the top tunnel cover. When the tunnel gets a little toasty, I turn it on. The air flows out the many openings in the back. Not perfect, but works well enough to be comfortable.

[lr172]

I had originally considered this, but skipped it in favor of getting in the air. I hadn't noticed any real warmth from my tunnel until a couple of long x countries this summer. I simply felt there was more warmth coming from my leg area than there should be. Tunnel is definately not hot, but seems a bit warmer than ambient.

Are others seeing this as well? I am guessing that this approach would eliminate that.

My F/W has insulation and also have some insulation (non flamable or at least non-toxic, mineral insulation) on the floor of the tunnel.

Larry