REFLECTOR: MY LAST QUESTION ON PITCH TRIM!!!

[Jim Sower]

<... not enough up trim with two people up front and I'd have to be 
pulling back pretty good at rotation ...>
I'd take that. I find that the nose up trim requirement tends to 
dissipate from acceleration nearly as fast as I can trim the nose down 
anyway, so a heavy stick helps me. Matter of fact, I deliberately reduce 
nose up trim for takeoff for that reason.
Jim S.


Ronnie Brown wrote:

> While at high speed cruise (165 kts - 8500 feet - 2650 rpm) my trim is 
> pretty much all the way up - if I am by myself. Two people, no problem.
> On high speed descent when alone, over 170-175 kts, then I am out of 
> down trim. So I just add some forward stick pressure - or slow down a 
> bit (less than 155 kts). Before take off, 1" elevator down when alone, 
> 2" down when a front seat passenger is on board. Then as speed 
> increases toward cruise, the trim goes toward more down.
> I have considered shifting the trim actuator front pivot a bit forward 
> to improve the cruise descent, but then I won't have enough up trim 
> with two people up front and I'd have to be pulling back pretty good 
> at rotation. So I have decided it is best where it is. It is installed 
> pretty much like the 1999 manual - no changes to the ? spring. ( I 
> don't think this has changed in the on-line manuals).
> Ronnie Brown
> 173 Elite RG - 200 HP Lyc - 66x70" Catto (climb prop - I'm on a 3000' 
> field).
>
>     ----- Original Message -----
>     *From:* Tom Martino <mailto:tmartino at troubleshooter.com>
>     *To:* reflector at tvbf.org <mailto:reflector at tvbf.org>
>     *Sent:* Sunday, November 07, 2004 9:33 PM
>     *Subject:* REFLECTOR: MY LAST QUESTION ON PITCH TRIM!!!
>
>     This is where I do need the experience of those flying!
>
>     When flying at high speed cruise ... do you find yourself needing
>     nose up or nose down trim? If you need to trim “nose down” ...
>     what is the most deflection you need on the elevator (from neutral)?
>
>     When landing I assume you need nose up trim, again ... how much
>     deflection from neutral?
>
>     Thanks much.
>
>     Tom
>
>     173EX (not flying yet, but very, very close – before the end of
>     the year!)
>