Norvel 15 prop studs.
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1/2A Airplane Engines 049-074
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TOPIC: Norvel 15 prop studs.

Norvel 15 prop studs. 13 years ago #10

  • qwerty
Glad to have you blokes back selling Norvels. It's been necessary to buy complete engines on Ebay to get parts while you were gone.

Just a suggestion in case no one has ever raised it before. The prop studs on the 15's are very brittle. I've seen people snap them while over tightening. They're easily replaced with a 10-32 tpi UNC socket headed bolt but can snap inside the shaft.

The night before last I replaced a propeller and left the whole engine sitting on the bench. Next morning it had snapped spontaneously and the prop was thrown some distance away. It is a bit of a chore to get the broken shaft out of the crankshaft end.

My suggestion is a prop stud made of less brittle HT steel.

Keep up the good work.

Ray
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