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I saw a Glasair that had an oil fire just after departure. The tower
called him and told him that he was smoking. He made an immediate 180 and landed the opposite direction. He said that the Fire Dept was hosing him down as he was still rolling. He said that total flight time was only 2 or 3 minutes. His firewall was aluminum / fiberfrax / fiberglass covered rohacell. The aluminum must have melted almost immediately, this allowed the fiberfrax to move away from the fiberglass covered rohacell. The fire then burned through fiberglass/rohacell and entered the right side of the cockpit, good thing he didn't have a passenger. Glasairs have their fuel tank in the forward section of the wing. The fire now starts burning his into his wing fuel tank. Only one layer of fiberglass separated the fire from fuel when the Fire Dept had it put out. After seeing this I decided to go with stainless. If you have a fire at altitude you'll sure wish you had not used aluminum. The extra one or two pounds of a better metal may save your life. Russell Sherwood Houston TX "Flyhighdave" wrote in message ... I'm building a Barracuda-!/4in. plywood firewall. What is the best material for the fire barrier? .16 stainless or .16 2024 T-3 with a layer of 1/8in. fiberfrax sandwiched between the aluminum & the plywood? I'd like to go with the aluminum because of weight if it & the fiberfrax are an appropriate combination. Are there any other materials I should be considering? Thanks! David |
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