I made the big cuts first...holes for engine controls, fuel/brake lines, wires, and mounting of the oil cooler. Throttle/prop/mixture cables come thru one hole like many certified birds.
Big holes have flanges I turned out of 304 stainless bar on the lathe, which firesleeve clamps to. Used stainless screws and steel stop nuts to mount those. Insulation is sandwiched in-between the firewall and these flanges.
My Comanche is 57 years old and had the same type of material on the firewall. I learned from it to make everything removable so the insulation can be replaced.
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
Last edited by rocketbob : 01-07-2019 at 11:46 AM.
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