Locking Prop - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-11-2014, 12:47 PM   #1
RCC Apprentice
I am: Don H
Join Date: Jan 2014
Location: Terrace, BC
Radio of choice:
Spectrum DXS6i
# of RCs: 4

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Locking Prop

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Hi, I was watching a build video on the Nitroplane web site showing the complete building of a Piper J. Cub

The build was very straight forward but there was one part of the build which confused me.

When the propeller was mounted on the shaft of the engine, you were instructed to remove the nut which was mounted on the shaft, place the propeller on the shaft place a washer on the shaft then to mount the spinner and then tighten the spinner using an Allan key.

On the propeller for this plane there is a cavity on the back of the prop that fits the nut exactly. Would the propeller not benefit from being locked onto the shaft with the nut.

On other planes I have seen hubs what were locked onto the shaft why would a propeller only be tightened and not locked onto the shaft.

Question to you all, is friction all you need to hold the prop in place, or should you use the nut to hold the prop in place on the shaft?

Last edited by DonRhone; 04-12-2014 at 06:56 PM.
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