Insulation in the rear air inlet housing, or wing to fuselage cavity?

[chrisb]

My Riley P337 doesn't have it in any of the places you mention.
I can't think why you would put insulation there?

[Rick Erwin]

Thanks Chris,

I think we’re going to remove it.

The only reason I can see to keep it could be the prevention of oil canning that Kim mentioned below. I think it would take a lot of insulation to be crammed in there to apply enough pressure against the air inlet that it’s unlikely to have much effect.

I’ll monitor the rivets for paint cracking and report back if I see anything detrimental.

Rick

[hharney]

I took every fragment of fiberglass insulation out of my plane and replaced it with STC'd foam aviation product. Didn't use any outside the cabin. Get that old fiber filter out and put in the garbage, it's useless

[Rick Erwin]

Originally Posted by hharney

I took every fragment of fiberglass insulation out of my plane and replaced it with STC'd foam aviation product. Didn't use any outside the cabin. Get that old fiber filter out and put in the garbage, it's useless

Thanks Herb. Do you recall the name of the foam you used and where you got it from?

Rick

[hayesjaj]

I found the same in my rear engine intake, stuffed into each side. The aircraft had been in a hangar for a month and it was still damp. Yanked it out quickly…doesn’t seem to be any point other than to keep birds from building nests.

[Rick Erwin]

Originally Posted by hayesjaj

I found the same in my rear engine intake, stuffed into each side. The aircraft had been in a hangar for a month and it was still damp. Yanked it out quickly…doesn’t seem to be any point other than to keep birds from building nests.

Agreed, thanks for voicing your experience,

Rick