Wattage B-2 motors on 7 cells? - RC Groups
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Jun 29, 2001, 06:37 PM
Electric Coolhunter
Thomas B's Avatar

Wattage B-2 motors on 7 cells?


We have a fun thread going over in Foamies about converting a FF molded foam N9M flying wing into an R/C model. (23" span, 100 sq in)

I'm getting pretty good park flyer-like results with two Wattage B-2 motors (not loose generic N-20 motors) and the stock black props and a 6 cell 150 mah Nicad.

What kind of luck and motor longevity have people had when using the B-2 motors on 7 cell nicad packs? (again, 150 N type nicads)

What about a better prop? I got some of the orange B-2 replacement props to try, as well.
Would U-80s be a better choice?
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Jun 29, 2001, 06:56 PM
Registered User
I am running U-80's on the B-2. They are much quieter than the original but they do load up the motors. I have not run 7-cell Nicads, just 6-cell Nicads and 7-cell NiMHs.
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Jun 30, 2001, 05:05 AM
Flying...Pushing Air Down
sr71fan's Avatar
I burned up two of the B-2 motors on my B-36 using 7 cells and U-80 props. Back to 6 cells now. Also burned up four B-2 motors on my C-130 using 6 cells and U-80 props. Have yet to burn up the B-2 motors in my B-2 using 6 cells and the stock props. Guess I've been working those poor little motors too hard in the other two planes.
Jun 30, 2001, 03:42 PM
Electric Coolhunter
Thomas B's Avatar
Hmmm...interesting.

But, I can see where the greater load of the U-80 props AND 7 cells might be bad. My B-2 motors are not even warm on 6 cells.

I was talking 7 cells and the old, stock B-2 props. I got one yes vote from Paul Willenborg, so far.

Are you getting better performance on 6 cells with U-80 props?
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Jun 30, 2001, 04:40 PM
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sr71fan's Avatar
Better performance and less noise.
Gary 8-)
Jun 30, 2001, 07:59 PM
Registered User
why dont you trim a little plastic off the u-80's, so that you can run 7 cells with the u-80's
Jul 01, 2001, 06:15 AM
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sr71fan's Avatar
Why didn't I think of that? !%#@$&?