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Old May 11, 2004, 06:57 AM
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Joined Apr 2003
499 Posts
Extreme Flight RC mini 3d brushless conversion

I'm posting this for a friend:

"I am looking for recommendations on how to set up my mini 3d. I'd like to be able to use one of the motors that I already have, which are: B20-12L, B40-21S, or B40-9S.
I also have 8-12 Etech 1200 mah cells (7C), and a phoenix 45, would also like a recommendation on which gearbox to use. I would appreciate any feedback. Thanks"
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Old May 12, 2004, 09:02 PM
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Hmmmm......this is usually a very opinionated group !
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Old May 13, 2004, 07:15 AM
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Aio_1's Avatar
Ireland, Kildare, Leixlip
Joined May 2002
6,441 Posts
What size & weight is the plane without power system?
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Old May 13, 2004, 09:38 AM
Forgot how to fly
Mike Parsons's Avatar
Atlanta, Georgia
Joined Oct 2002
10,181 Posts
My thread:
http://www.rcgroups.com/forums/showthread.php?t=207474

Kirby's thread:
http://www.rcgroups.com/forums/showthread.php?t=223443

B20- No way

I like this one per motocalc:
B40 21S- 3.33:1 14X8 APC on a 3S4P (26 amps and 53 oz of thrust)

This one isnt bad either,
B40 9S- 6:1 12X8 APC on a 3S4P (about 35 amps WOT)

MEC superbox: http://www.modelelectronicscorp.com
$50 and you can experiment with different ratio's very easily.
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Last edited by atlantae; May 13, 2004 at 09:40 AM.
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Old May 14, 2004, 08:05 PM
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Joined Apr 2003
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Thanks for the links. I have the superbox. Time to get experimenting.
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