REFLECTOR: Elevator trim

[Geoff Gerhardt]

Thanks for the explanation.  I have the Strong Pitch Trim.  While I'm not
flying, I haven't noticed that it runs on significantly after the trim
switch has been released, so I'm guessing that this has only been used for
the factory trim.  I think it uses the same (similar?) linear actuator as
the speed brake, and I have noticed that it does run on a bit after the
switch has been released.

Geoff

On Tue, Jan 10, 2012 at 6:49 PM, Laurence Coen <lwcoen at hotmail.com> wrote:

> Thanks Sid, I couldn't have said it better myself.
>
> Larry Coen
> N136LC
>
> ------------------------------**--------------------
> From: "sbjknox" <sbjknox at earthlink.net>
> Sent: Tuesday, January 10, 2012 4:24 PM
> To: <geoff.gerhardt at gmail.com>; "Velocity Aircraft Owners and Builders
> list" <reflector at tvbf.org>
>
> Subject: Re: REFLECTOR: Elevator trim
>
>
>> ----- Original Message ----- From: "Geoff Gerhardt" <
>> geoff.gerhardt at gmail.com>
>>
>>  Can you explain what you mean by "dynamic braking of the trim motor?"
>>>
>>> Geoff
>>>
>>>  Look at the drawing from Laurence Coen.  Dynamic braking is when the
>> circuit does not simply disconnect a DC motor to stop it but additionally
>> connects its two terminals together to act as a 'short-circuit' across the
>> still turning motor (now acting as a generator) and causing it to stop dead.
>>
>> Sid
>> Oklahoma
>>
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