Torque ? Wood prop, Continental IO-240
Hello everyone,
I bought a crashed kitfox 5 with an IO-240 in it, and rebuilt the plane in the past few months.
I purchased a new propeller from pros inc.
I was wondering if I can have some information shared about the torque settings for the prop bolts. What should I torque them to? then, how often should I re-tighted, or check them.
Re: Torque ? Wood prop, Continental IO-240
Your going to need to let one know what prop and engine combination your using to get your answer. Congrats on nearing completion.
Re: Torque ? Wood prop, Continental IO-240
Doesn't the prop manufacturer have torque info available? JImChuk
Re: Torque ? Wood prop, Continental IO-240
Jim's right... every propeller I've ever bought, whether wood, composite or metal has had available recommended torque values. Wood props, especially, will vary depending on type of wood, composition & other factors. That is one area you'd be very wise to avoid guessing about. Follow the manufacturer's recommendations/specifications.
Re: Torque ? Wood prop, Continental IO-240
Quote:
Originally Posted by
jrevens
Jim's right... every propeller I've ever bought, whether wood, composite or metal has had available recommended torque values. Wood props, especially, will vary depending on type of wood, composition & other factors. That is one area you'd be very wise to avoid guessing about. Follow the manufacturer's recommendations/specifications.
Thanks guys I'll contact props incorporated.
Re: Torque ? Wood prop, Continental IO-240
Quote:
Originally Posted by
jrevens
Jim's right... every propeller I've ever bought, whether wood, composite or metal has had available recommended torque values. Wood props, especially, will vary depending on type of wood, composition & other factors. That is one area you'd be very wise to avoid guessing about. Follow the manufacturer's recommendations/specifications.
I found out. Any where between 4 and 6 ft lbs.
Re: Torque ? Wood prop, Continental IO-240
Do you have the torque sequence and is it done in increments?
Re: Torque ? Wood prop, Continental IO-240
Quote:
Originally Posted by
kitfoxJeff
I found out. Any where between 4 and 6 ft lbs.
I sure don't want to muddy the waters, but that sure sounds like a VERY low torque spec for a wood prop. Do you know what kind of wood it is made of? Hard Maple is one of the common woods used by some manufacturers. Are you using a face ("crush") plate? What size bolts?
Here are some common propeller brands in the Experimental world, and their recommended torque values for wood props, 3/8" bolts and a crush plate -
Sensenich : 15 to 19 ft. lbs.
Aymar-DeMuth : 18 ft. lbs.
Pacesetter : 25 ft. lbs.
Prince : 17.5 ft. lbs.
Re: Torque ? Wood prop, Continental IO-240
Good point John. The torque on my Catto prop is 25 ft-lb.
Re: Torque ? Wood prop, Continental IO-240
This sure is one area where you want to get it right! There are many stories of a prop coming off in flight.