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Performance Propellers bolt torque values

FinnFlyer

Well Known Member
Maintenance sheet from Performance Propellers specifies 30-35 FL-LBS for 3/8" bolts.
Sensenich specifies 15 to 19 fl-lbs for 3/8" AN6 bolts.

Anyone know why the difference?

I found this:
"...Both are very tough (60 layers of maple vs wood/composite) with bolt torques around 35 ft pounds...."

Is it simply because the Performance Propellers are made of harder wood?

Finn
 
I looked at PP's website today. They've lowered the value for 3/8" bolts to 25-30 ft-lbs. The higher than usual values is still a mystery.

Finn
 
35# with 3/8. The other Catto I have for 1/2" uses 40#.
Catto is a composite. Wood core, Fiberglass/carbon and a bonded aluminum plate on the crank side face. Always with a crush plate on the bolt head side.
 
Last edited:
Maintenance sheet from Performance Propellers specifies 30-35 FL-LBS for 3/8" bolts.
Sensenich specifies 15 to 19 fl-lbs for 3/8" AN6 bolts.

Anyone know why the difference?

I found this:
"...Both are very tough (60 layers of maple vs wood/composite) with bolt torques around 35 ft pounds...."

Is it simply because the Performance Propellers are made of harder wood?

Finn

Finn, Not because of harder wood but because it is multi-laminate and resorcinol glue, which is much denser than wood plank props.
 
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