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Old Feb 15, 2014, 05:52 PM
Electric Airplane Junkie
bhchan's Avatar
San Mateo, Ca , USA
Joined Jun 2000
5,595 Posts
Question
Longer rear mount prop adaptor?

Does Hacker has a rear mount prop adaptor for the A50 motor?

The one I have is 30mm long (tip to the base surface where the prop sits). The propeller I am using is a 18X8, with the hub thickness of 20mm, with the spinner back plate about 2.5mm, and a prop washer, there is not much of the threaded shaft to put a prop nut on, about 6mm, not even 1 diameter of thread.

Brian, an EAJ
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Last edited by bhchan; Feb 16, 2014 at 12:27 AM. Reason: wrong model, A not B motor....
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Old Feb 17, 2014, 09:49 AM
United States, AZ, Tempe
Joined May 2009
24 Posts
Hello Brian,
The A50 prop adapter is only available in that size. It sounds as though you are using a wood prop, which have very thick prop hubs. The Hacker Prop adapter is designed with composite props in mind such as APC.
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Old Feb 17, 2014, 05:38 PM
Electric Airplane Junkie
bhchan's Avatar
San Mateo, Ca , USA
Joined Jun 2000
5,595 Posts
Ok, I am using a Mejzlik carbon 18X8 prop. I think Hacker needs to supply a longer prop adaptor for the big motors! Or I need to find a Mejzlik e carbon prop! The other option is to make a special prop nut with a shoulder. It is working so far but not sure I can really tighten it.

Brian, an EAJ
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