Hi Cedric,

I would recommend http://www.maxcim.com/

Another source is http://www.astroflight.com but I've had mixed luck
with them. They are very well known for designing high-end motors for
solar powered aircraft experiments, etc., but their specs on their
regular off-the-shelf products do not seem to be conservative at all.
If you run their motors in the exact application they intend (i.e.,
typical RC electric flight) it is probably fine. We found, for
example, that you couldn't run one of their motors which was rated at
400W at anywhere near 400W continuously (I don't remember the numbers
exactly). They must have assumed some kind of a duty cycle in that
rating, but their specs didn't state what duty cycle they assumed.

Both of the above are mainly brushless (although astro has some
brushed). If you are looking for brushed, then Graupner has a pretty
good name.

I'm sure there are several other high quality RC electric motor
manufacturers which would make motors suitable for you. Most of the
high-performance commercial (i.e. industrial) motors are way
over-built and much heavier per HP than the hobby motors. Of course,
they will last for years and years of continuous service at the full
rated max (Maxon motors and Micromo are some examples of this)

Finally, Mabuchi makes cheap, tiny, high power to weight ratio brushed
motors but I don't know of any which are over 100 or 200W. These are
used mainly in toys.

Sean


On 9/21/07, Cedric Chang <cc@nope9.com> wrote:
> Can I get some insight into 3 to 4 HP electric motors that have the
> most HP for the lightest weight.  I am flexible with respect to
> pricing, voltages, motor style.......
>
>
> Best
>
> Cedric
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