REFLECTOR: Elevator Trim Spring

John Dibble aminetech at bluefrog.com
Mon Jan 30 11:30:32 CST 2006


Ronnie,

I'm sorry, but I'm getting more confused.  My problem is that I don't have enough down
(elevator up) trim at cruise.  I can see how moving the actuator forward could help
this problem.  I don't understand why I need to cut the bracket.  Can't I simply move
it forward and make new holes in the canard?  I didn't build so maybe that is why I
don't understand.

Scott D - I think your idea of the block is going to send me in the wrong direction.
Appreciate your help here.

John

Ron Brown wrote:

> Morning John,
>
> No, lets try again.
>
> The objective is to move the actuator forward a bit which provides more up
> (elevator down) trim.  (That is if you have a problem with not enough "up"
> trim when in cruise configuration, only one person in front seats.  This
> solution allowed me to not only cruise without pushing forward on the stick,
> but also to trim for a 500 fpm descent with a slight reduction in power).
>
> To move the actuator forward, you will need to cut the canard attach bracket
> so that the hole is gone.  Now drill a new hole that is 1/4" to 3/8" forward
> of where the old hole was.
>
> By the way, the bracket shown in the new on-line manual is different from my
> 1999 kit.  The new bracket (Long Bracket VAB-02) shown on page 10-8 of the
> online manuals is shorter than mine.  What ever bracket you have, the
> objective is to move the forward part of the actuator about 3/8" toward the
> nose of the plane.
>
> Ronnie Brown
>
> ----- Original Message -----
> From: <aminetech at bluefrog.com>
> To: <reflector at tvbf.org>
> Sent: Sunday, January 29, 2006 10:03 PM
> Subject: Re: REFLECTOR: Elevator Trim Spring
>
> > Ok.  Let's see if I got this.  You're talking about the bracket that
> > attached the actuator
> > to the canard?  And you shortened the bracket so you could move it aft?
> > And then
> > you drilled a new hole in to bracket and attached to the old aft hole in
> > the canard?
> > Did you drill a new forward hole in the canard for the other bolt?  How am
> > I doing?
> >
> > John
> >
> > Ron Brown wrote:
> >
> >  John,
> >
> >  I had the same problem with my 173.
> >
> >  I cut the trim actuator front mounting bracket off at the front of the
> > old
> >  bolt hole.
> >
> >  Then I drilled a new hole about 1/4" or 3/8" ahead of the old hole.
> > Problem
> >  fixed, and I still have plenty of up trim for take off.  Easy fix.
> >
> >  Ronnie
> >
> >  ----- Original Message -----
> >  From: "John Dibble" <aminetech at bluefrog.com>
> >  To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> >  Sent: Sunday, January 29, 2006 3:11 PM
> >  Subject: REFLECTOR: Elevator Trim Spring
> >
> >  > Flying solo, I run out of down trim at 155 IAS.  On the other hand I
> >  > have plenty of up trim for TOL.  Can I make a wedge shim where the
> >  > spring attaches to the elevator tube to shift the adjustment range to
> >  > more down and less up, or do I simply have to add more glass to the
> >  > spring to make it stiffer?
> >  >
> >  > John
> >  >
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