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Sounds like it has a radial engine!!
It's most likely the metal bearings gone rusty from condensation and not used for a while, The bearings are used for the axel to spin on to prevent vibration in the engine and blades.
Sounds like it has a radial engine!!
It's most likely the metal bearings gone rusty from condensation and not used for a while,
The bearings are used for the axel to spin on to prevent vibration in the engine and blades.