REFLECTOR: Not enough Trim authority

[Jack Prock]

Hi,

I'm curious about what plane did you install the Strong trim system in and
it didn't work? I'm still
building an XL, and have the Strong system installed. I'm not flying yet, so
I'm now second
guessing my original decision.

Jack

----- Original Message ----- 
From: "Brett Ferrell" <reflector at velocityxl.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Cc: <scott at tnstaafl.net>
Sent: Monday, November 16, 2009 2:47 PM
Subject: Re: REFLECTOR: Not enough Trim authority


> Scott,
>
> Nope, we didn't have enough authority either, and reverted back to the
factory system after trying the Strong system for several hours.  We worked
with Alex a bit to try and get more trim authority but decided to get the
plane tested before we messed with the trim any more.  I think Alex will
work with us to get a solution, but shortly after completing our 40 hours we
landed on a road, so we haven't gotten back to testing yet.  ;-)  I hope to,
because it's a slick idea, we just need more trim than the current solution
seems to offer, at least for our airplane (I know that Dave nelson is quite
happy with his installation).
>
> Brett
>
>
> >  -------Original Message-------
> >  ----- Original Message -----
> >  From: "Scott Derrick" <scott at tnstaafl.net>
> >  To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> >  Sent: Monday, November 16, 2009 3:03 PM
> >  Subject: REFLECTOR: Not enough Trim authority
> >
> I was flying today after my latest change to the cooling system, oil and
> cylinders.  Not quite right but much much better. Oil stayed around 185
> when at 50%, came up to 205 after 10 minutes of  full throttle, I was
> about 150 ROP.  It was settling in at 175-180 KIAS at 10,500, turning
> 2600 rpm.  Still have one cylinder running 45 degrees hotter than
> everybody else.   I'm going to swap sensors and make sure that isn't the
> problem.
>
> I do have a problem with the trim.  I just don't have enough down trim
> for cruise speeds.  If my indicated is 150kias or below its fine. I am
> using the Strong System because I was under the impression it had a
> wider range of trim than the factory design. Now I wonder.  I have
> plenty of up trim on approach with single pilot but I haven't loaded up
> the front yet(forward cg).  Still waiting for the new Catto prop before
> I add any more ballast to the front seat.  I have the system installed
> so its got about 60% down trim travel, and 40% up trim, so I'm already
> over  compensated  for down trim.  The instructions call for 50/50.
> I'm sending Alex an email to see what he recommends.
>
> In the mean time I'm thinking about plan B, which is to reinstall the
> factory trim, but stiffen up the spring somewhat to provide more trim
> authority.  I'msomewhat reluctant because of the problem of runway trim
> with a stronger spring.
>
> What are the fast V's doing?  I had marginal trim before with the
> factory spring, not quite enough down, just barely enough up with the
> io360.  Thats why I changed to the Strong system.
>
> Anybody else have this problem?  Solutions?
>
> Scott
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