The 16 year old Clark Lydic Performance propeller on my RV-3B have some black spots. Is that mold from moisture that has somehow made its way below the urethane finish? Perhaps through minute cracks in the finish from rock strikes?
Also, along the trailing edges the urethane has begun to lift off.
Obviously it could be sent back to the manufacturer for refurbishing. But there must be some skill to be learned on how to maintain and refurbish a wood propeller.
I assume that one needs to sand down spots to the bare wood and then apply multiple layers of spar varnish.
Anybody here have experience in this field and any tips?
Finn
Also, along the trailing edges the urethane has begun to lift off.
Obviously it could be sent back to the manufacturer for refurbishing. But there must be some skill to be learned on how to maintain and refurbish a wood propeller.
I assume that one needs to sand down spots to the bare wood and then apply multiple layers of spar varnish.
Anybody here have experience in this field and any tips?
Finn