ppilotmike
Well Known Member
Not wanting to resurect older threads about the topic of heatshielding (both firewall and belly near exhaust exit), I want to ask the following:
The Plan:
My plan to insulate my firewall and also the belly of my airplane, near the exhaust, is to create a sandwich of materials. The firewall will consist of the Van's stainless steel firewall (structural), then a layer of 1/8" fiberfrax insulation, then a sheet of 0.010" stainless steel sheet, for protection more shielding. The belly of the plane, near the exhaust, maybe 2'-0" back, will consist of Van's outer aluminum skin (structural), then a layer of 1/16" fiberfrax insulation, then a sheet of 0.010" stainless steel sheet. Everything will be riveted per the plans, using aluminum rivets, but I'll be adding some extra, longer rivets (to allow for depth of sandwich), sporadically to hold the assembly together.
The Question:
My concern is that the aluminum rivets have a much lower melting point than the assembly, and that adding additional ones to secure the sandwich of material, might have detrimental effects on the structure. Is there another, better way to secure this sandwich of materials, like an adhesive, that would protect the normally installed aluminum rivets of the firewall/belly skins, while still providing resistance to "coming apart" in the heat of a fire? Stainless steel rivets?
The Plan:
My plan to insulate my firewall and also the belly of my airplane, near the exhaust, is to create a sandwich of materials. The firewall will consist of the Van's stainless steel firewall (structural), then a layer of 1/8" fiberfrax insulation, then a sheet of 0.010" stainless steel sheet, for protection more shielding. The belly of the plane, near the exhaust, maybe 2'-0" back, will consist of Van's outer aluminum skin (structural), then a layer of 1/16" fiberfrax insulation, then a sheet of 0.010" stainless steel sheet. Everything will be riveted per the plans, using aluminum rivets, but I'll be adding some extra, longer rivets (to allow for depth of sandwich), sporadically to hold the assembly together.
The Question:
My concern is that the aluminum rivets have a much lower melting point than the assembly, and that adding additional ones to secure the sandwich of material, might have detrimental effects on the structure. Is there another, better way to secure this sandwich of materials, like an adhesive, that would protect the normally installed aluminum rivets of the firewall/belly skins, while still providing resistance to "coming apart" in the heat of a fire? Stainless steel rivets?