Firewall Material

[Martin S.]

Evening gents,

can somebody tell me what the Mooney firewalls are made of, steel or aluminum. Don’t have my plane nearby to check.
Background: I’m trying to install one of these neat looking eyeball fittings for passing wires through the firewall. They have both Alu and steel fittings. Seems better to mount a steel one on a steel firewall for avoiding corrosion.

Greets,

Martin

Edited December 18, 2022 by Martin S.

[N201MKTurbo]

They are .020 stainless steel. But don’t believe me, check the manual.

[EricJ]

+1 stainless steel.   Most aircraft firewalls are stainless.   I think the IPC shows the specific alloy.

[A64Pilot]

SS definitely aluminum won’t pass the test, some others in the past have been made from inconel,,but modern aircraft SS, most probably 304 half hard.

Maule, older Cessna’s and others have used zinc plated steel. It’s cheaper.

[Guest]

Most Piper Cherokees and Comanches use galvanized steel as well.

[A64Pilot]

8 hours ago, M20Doc said:

Most Piper Cherokees and Comanches use galvanized steel as well.

SS is just prettier and actually not as strong structurally and has other disadvantages, but it is prettier  

All Thrush except for the GE H-80 use galvanized steel, but I wanted SS as it’s prettier for the H-80.

[Martin S.]

Thanks everybody!