REFLECTOR: Elevator trim problem
John Dibble
aminetech at bluefrog.com
Thu Jan 12 16:02:37 CST 2012
I'm seriously thinking about that. Maybe with an additional switch to
switch between the stick buttons and the toggle so I can keep the stick
controls which work most of the time.
John
Douglas Holub wrote:
> All arguments for a single DPDT (on) off (on) toggle switch on the
> panel for elevator trim, on the left side where it's easy to reach
> with the left hand. Only one robust component.
>
> ----- Original Message -----
> From: Michael Watson
> To: Velocity Aircraft Owners and Builders list
> Sent: Thursday, January 12, 2012 12:29 PM
> Subject: Re: REFLECTOR: Elevator trim problem
> John,
>
> I also have a Mac 7 stick. Last year I had a problem with an
> intermittent up button.
> I called Mac and they sent me two new buttons to replace the
> up and down ones.
> No problems since. I think your up button may be sticking.
> Unscrew the two screws
> under the head four or five turns, twist the head left to
> right while pressing the up button
> and see if it sticks. Find a position that it moves up and
> down smoothly then tighten the
> screws.
>
>
>
>
> On Thu, Jan 12, 2012 at 10:15 AM, John
> Dibble <aminetech at bluefrog.com> wrote:
>
> While we're on this subject, I need help with an
> issue with my elevator
> trim. Over the past 100 hours, infrequently it
> seems to trim up
> uncommanded. I push forward on the stick to keep
> level and push the
> trim down button. For a second or two nothing
> happens. Then it
> responds properly. I know if I press both buttons
> at once, nothing
> happens, so I'm guessing that there is still an up
> input in the second
> or two when nothing happens. I have a solid state
> relay that failed
> once. In that case the output voltage reduced to
> where the motor
> wouldn't run. I have a Mac 7 stick. On the
> ground the buttons operate
> well with no sign of sticking. I have several
> questions.
>
> Where is the mechanism that prevents operation
> when both buttons are
> pressed? In the stick? In the relay? In the
> motor?
>
> Can I eliminate the relay and run full current
> through the stick?
>
> I may wire lights to the leads going to the motor
> so I can confirm when
> current is being sent to the motor.
>
> Thanks,
>
> John
>
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>
>
>
> --
> Mike W.
> 1997 Velocity Elite RG
> Franklin /IVO Electric CS
> Dual GRT EFIS HX Synthetic Vision
>
> -------------------------------------------------------------
>
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