Matthew P Posted May 4 Report Posted May 4 The old cloth covered interior firewall insulation is completely deteriorated and needs to be pulled out and discarded in my 1965 M20E. What do you all use in its place as a thermal barrier? V/r Matt Quote
M20F-1968 Posted May 5 Report Posted May 5 On 5/3/2025 at 11:18 PM, Matthew P said: The old cloth covered interior firewall insulation is completely deteriorated and needs to be pulled out and discarded in my 1965 M20E. What do you all use in its place as a thermal barrier? V/r Matt I did this then in rebuilt the airframe. I made a firewall blanket from soundproofing material. It was installed after the firewall was in stalled but before the avionics were installed , as I remember. I would need to check my old pictures of the project to verify. However, you need to deal with what you have. You can make a firewall blanket and slide it between the firewall and the avionics and wires. The old firewall sound-proofing must be removed. It can be installed with threaded fasteners (machine screws) appropriate for high temperature installation. You will not need many fasteners. The firewall blanket can be made in sections so it is easier to install, but I can assure you it will be a PITA to install. You might find a young, small, flexible, and willing assistant to help. As you already know, working behind the panel in a Mooney is always challenging. It's the price you pay for a small frontal area and speed. John Breda Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.