[NSRCA-discussion] Trim changes

[Joe Walker]

Keith,
I suppose I'm just low tech sometimes... But the cables on the elevators
takes me about 30 minutes start to finish (ok 2 hours when I get distracted
by the TV...).  The only trick to getting the same throw is to make sure you
have the control horns aligned correctly.  I just went through 2 sets of the
JR 3421's on the dual servo set up and when I moved to full throw I could
just barely notice a difference between the 2 elevators.  I've seen the same
issue with Futaba servos.  Right now I'm using the MK bell crank which seems
pretty nice, but has just a bit of slop to it.  I suppose I need to take a
peek at some other folks installation of the cables and see what is making
other installations difficult.  Mine seemed pretty straight forward.

Joe W.

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Keith Black
Sent: Wednesday, December 06, 2006 9:29 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Trim changes

> Getting a matched pair of servos seems like too much to ask these days...

Hum, in my opinion servos have never been better than "these days".  I've
gone with the dual servos in the stab (JR DS3421sa), pull-pull and the DEPS
system. Servos in the stab were the easiest to setup hands down. Logically
speaking it seems that the DEPS system would be the most accurate, but I
feel that stab servos work equally as well. To me the pull-pull was by far
the most difficult to adjust throws so both elevator halves moved exactly
the same.

Keith


----- Original Message ----- 
From: <vellum2 at bellsouth.net>
To: <randy10926 at comtekmail.com>; "NSRCA Mailing List"
<nsrca-discussion at lists.nsrca.org>; <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, December 06, 2006 4:53 PM
Subject: Re: [NSRCA-discussion] Trim changes


> OK... I think you guys have it all wrong with the elevator controls.  I've
now used just about every system out there and there is only one I really
like.  Cables.  Zero differential, Zero trim changes, by far the lightest
choice, infinitely adjustable, no slop and a no brainer to install.  What
could be better!?
>
> Getting a matched pair of servos seems like too much to ask these days and
just about every pushrod material changes dimension with temperature
changes.  When we are flying planes where one click of trim is all it takes
to make a noticable difference, why make the problem worse?
>
> Keeping it simple is the way to go.  Unless you are talking engines, then
it is YS all the way! Yeah!
>
> Joe W.
> >
> > From: "Glenn Hatfield" <randy10926 at comtekmail.com>
> > Date: 2006/12/06 Wed PM 05:26:05 EST
> > To: <nsrca-discussion at lists.nsrca.org>
> > Subject: Re: [NSRCA-discussion] Trim changes
> >
> >
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion

_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion