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Old Jan 29, 2013, 10:20 PM
No flying at the Control Tower
karikamiya's Avatar
Canada, NT, Inuvik
Joined Jun 2010
132 Posts
Question
Thrust tester

Hello, i've jury-rigged a thrust tester, but im having some trouble with the prop adapter.

Whats happening is the prop adapter uses a grub screw, but the motor doesn't have a flat part for the screw. This is an easy fix with a dremel, but what worries me is the amount of thrust it takes to pop off. When i pull it off by hand i record over 5 kg of pulling, but when it pops off rotating its only pulling .6kgs

any particular reason for this?
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Old Jan 29, 2013, 10:49 PM
Will fly for food
ilektron's Avatar
United States, CA, Carlsbad
Joined May 2011
532 Posts
Vibration causing it to loosen up? You using any loctite?
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Old Jan 30, 2013, 04:00 AM
No flying at the Control Tower
karikamiya's Avatar
Canada, NT, Inuvik
Joined Jun 2010
132 Posts
You are indeed correct, i just looked at it after i induced a pop off and it was loose.

I will be buying some tomorrow. Could i loctite the smooth shaft too or does it only work on threads?
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Old Jan 30, 2013, 10:45 AM
Will fly for food
ilektron's Avatar
United States, CA, Carlsbad
Joined May 2011
532 Posts
You can loctite the smooth shaft, but I recommend against it. You may never get the prop adapter off if you do that.
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Old Jan 30, 2013, 12:00 PM
CSU Chico, Flight Club
Test Pilot Mafia's Avatar
United States, CA, Chico
Joined Sep 2012
859 Posts
i had to rough up my Eflight shafts, or the collet prop carriers would slowly pop off over 2-3 minutes of rotating.
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Old Jan 30, 2013, 10:07 PM
No flying at the Control Tower
karikamiya's Avatar
Canada, NT, Inuvik
Joined Jun 2010
132 Posts
So i rerigged the tester. I was unable to stop the pop offs, so i have combined the loctite with a ground notch into the side of the shaft for it to rest on.


It is working admirably now
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