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Old Apr 12, 2009, 03:10 PM
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Oral b toothbrush motor ???

what size prop can be used on this motor? What battery is in the toothbrush ?
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Old Apr 12, 2009, 03:32 PM
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Ask the tooth fairy.
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Old Apr 12, 2009, 05:57 PM
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What is a tooth fairy ? Does the tooth fairy fly model planes ?
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Old Apr 12, 2009, 10:00 PM
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I cannot imagine a toothbrush motor - designed to run on maybe 1v or so, at a few milliamps current draw, being able to spin a prop for a plane.

Manfred's joke was a reference to the mythical figure in childhood who leaves coins under the pillow of a small child in exchange for the baby-tooth they have just lost.
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Old Apr 12, 2009, 10:05 PM
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Delaware, Ohio
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Not sure what motor is in that. I would think a small brushed that may run on a single cell lipo. http://www.bsdmicrorc.com/index.php?...5&show_all=yes
This site should give you a few ideas.

Jim
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Old Apr 13, 2009, 02:15 AM
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Quote:
Originally Posted by cvint
what size prop can be used on this motor? What battery is in the toothbrush ?
A 14 gram brushed motor that can spin a 4x2.5 prop on 7.4V (2S LiPo) and produce around 40 grams of thrust while getting hot quickly.

For the same money, you'll be better off getting a 5 gram outrunner from UH and saving the toothbrush for washing your teeth
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Old Apr 13, 2009, 06:14 AM
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Dickinson, Tx.
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It would serve better to ask question in here http://www.rcgroups.com/indoor-and-micro-models-85/

I remember quite a few threads where people were using the electric "tooth brush" motors and modding them for our tiny planes...

Challenger413
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Old Apr 13, 2009, 06:20 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
The Netherlands, GE, Nijmegen
Joined Feb 2001
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Quote:
Originally Posted by Dr Kiwi
I cannot imagine a toothbrush motor - designed to run on maybe 1v or so ...
Plenty of little motors around that do a satisfying job on just 1.5V.

Vriendelijke groeten Ron
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Old Apr 13, 2009, 06:28 AM
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USA, TX, Grapevine
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This particular toothbrush appears to use something like a small N20 Mabuchi style motor. So direct drive something like a 2.5x2.5 prop or thereabouts. I was wondering where all those little surplus N20 motors were coming from.
http://express.howstuffworks.com/toothbrush-autopsy.htm

http://kmoddl.library.cornell.edu/leonardo/
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Old Apr 13, 2009, 08:28 PM
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actually I took one apart..looked like a johnson 250 to me.

Probably do good things on 4" prop and a 2s pack, but life is too short..
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Old Apr 13, 2009, 08:44 PM
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Quote:
Originally Posted by vintage1
actually I took one apart..looked like a johnson 250 to me.

Probably do good things on 4" prop and a 2s pack, but life is too short..

Yes, well, whatever powers your Johnson.

Maybe a flouride battery?
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Old Apr 14, 2009, 10:24 AM
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The Oral B motor is a good replacement for the Air Hogs AeroAce planes but is much too small for anything larger or heavier.

Bill
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Old Apr 14, 2009, 10:08 PM
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Thanks Sir Raleigh ,Vintage 1 and others for some real answers to my
question.
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Old Apr 15, 2009, 06:52 AM
An itch?. Scratch build.
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Alternatively, cut off the bristles and glue on a piece of sand paper for a mini power sander for awkward places.

Now that could make your eyes water
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Old Apr 15, 2009, 07:28 AM
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You'll get a spanking for that answer!
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