REFLECTOR: trim motor control

[Don Johnston]

Geoff,

Thanks for the suggestion!  I already have one of these that got for the
heater fan control.  :-)

Two questions:

1) are you running a setup like this
2) Do you (or would you)  have the speed control accessible in flight? Or
set it to the preferred speed and not have it accessible?

Don

On Wednesday, November 6, 2013, Geoff Gerhardt wrote:

> Don,
>
> I'd use something like this instead:
>
> http://www.ebay.com/itm/12V-40V-10A-Pulse-Width-Modulation-PWM-DC-Motor-Speed-Control-Switch-13KHz-NEW-/251356345922?pt=LH_DefaultDomain_0&hash=item3a86017642
>
> It will give you more control of the motor speed and run the motor at
> whatever voltage it is designed for.
>
> Geoff
>
>
>
> On Wed, Nov 6, 2013 at 1:21 PM, Don Johnston <numa at comcast.net<javascript:_e({}, 'cvml', 'numa at comcast.net');>
> > wrote:
>
>> I'm in the process of wiring the trim motors and I've been wondering
>> about something for a while:
>>
>> The trim motors are 24v motors. It is my understanding that the choice of
>> a 24v motor on a 12v electrical system was done to have the motor run at a
>> slower speed than an appropriately rated motor would. And that this allows
>> better trim control.  I don't know if this is accurate, it's just something
>> that I heard.
>>
>> My issue is that I have a 24v electrical system. I've looked for 48v
>> versions of the trim motors but they were either unavailable or way too
>> expensive.
>>
>> So I'm looking at a 28v-14v step-down converter.
>>
>> But before I pull the trigger on that purchase, I was wondering if:
>>
>> 1) My understanding of the 24v motor on a 12v electrical system was
>> correct.
>> 2) If anyone has come up with an alternative to slowing down the motor
>> speed which would save me from installing a step-down converter.
>>
>> Thanks,
>> Don
>>
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