I read Dr. Anders’ article in the Kitplanes magazine where he is describing sealing the cowling gap around the prop extension with a felt gasket. I am wondering why felt is not commonly used as a baffle material. I seem to recall reading an older article where felt is mentioned as baffling material, but not recently. It would seem to comply to the curves well, seal well, be gentle on the cowling underside, shouldn’t be heavier than the traditional rubber/silicone material. Judging by Dr. Anders’ usage in his application, it seems to be plenty durable.
The possible negatives I can think of are a) possibly absorbing oil and stuff in the engine compartment (not sure if it’s a concern though) and (b) flammability (although natural wool is fairly fire resistant and doesn’t emit poisonous gases, especially compared to non-silicone rubber baffle material commonly used.
What am I missing?
The possible negatives I can think of are a) possibly absorbing oil and stuff in the engine compartment (not sure if it’s a concern though) and (b) flammability (although natural wool is fairly fire resistant and doesn’t emit poisonous gases, especially compared to non-silicone rubber baffle material commonly used.
What am I missing?
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