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Old May 07, 2005, 07:35 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
21,015 Posts
Hacker 20-20L knock????

Hmmmmmmmm, my 20-20L has a knock - at low speeds it has a definite knock knock knock like a piece of cardboard hitting the spokes of bicycle wheel. Other than that it runs well. Can't hear it by spinning the motor free hand...it only is noticeable with the power on.
Any comments?


With a 10x4.7 GWS SF, it draws a little over 19A at full throttle from a PQ 3s1500. Only takes 1/2 throttle to fly the 23oz Decathlon.
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Old May 07, 2005, 10:14 PM
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RickC2009's Avatar
USA, NY, Brookhaven
Joined Mar 2003
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What speed controller are you using?
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Old May 07, 2005, 10:21 PM
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
21,015 Posts
CC25 V1.10

I can't give you the parameters because it won't let me access the info without upgrading to 1.2 or whatever.
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Old May 07, 2005, 10:23 PM
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USA, NC, Clayton
Joined Feb 2001
5,814 Posts
Ive seen this recently with a couple outrunners on castle escs...I am curious about it, but dont have the answers for you.

sorry,
David
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Old May 07, 2005, 11:23 PM
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I saw another post saying the CC doesn't work well with the hackers. I would try another speed controller just to see.
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Old May 08, 2005, 12:00 AM
Good Better Best quest.
olmod's Avatar
Australia, VIC, Cranbourne East
Joined Apr 2004
10,518 Posts
mmmm

try a hd prop i believe and ive heard slow fly props make some weird noises at revs.
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Old May 08, 2005, 11:26 AM
Space Coast USA
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Space Coast
Joined Oct 2000
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Did a little more listening and spinning and unfortunately, it is in the motor.... At one location in a 360 degree spin, the click is very noticable. Something is making hard enough contact to make a very audible metallic clank. Time to call Hacker....

Sounds like a loose magnet....
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Last edited by hoppy; May 08, 2005 at 03:23 PM.
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Old May 20, 2005, 09:11 PM
Space Coast USA
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Space Coast
Joined Oct 2000
21,015 Posts
Hacker says one of the magnets had moved - sending a replacement.
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Old May 20, 2005, 09:23 PM
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Stratford Sikorsky, Connecticut, United States
Joined Dec 2001
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excellent.

Did you ever get to fly it?

Killer
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Old May 20, 2005, 10:41 PM
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Grove City PA basement/park
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Should be the last motor brand I'd expect that to happen too. I guess I'll stay with the cheapies.
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Old Jul 18, 2005, 08:43 AM
Space Coast USA
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Space Coast
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Quote:
Originally Posted by scratchandbash
Should be the last motor brand I'd expect that to happen too. I guess I'll stay with the cheapies.

It is a cheapie

The motor is GREAT!! I'd buy another one in a flash.
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