[NSRCA-discussion] Which servo?

Mon Jun 2 05:38:01 AKDT 2008

Don't worry about servo speed unless you are doing snaps or other stick
banging maneuvers. The advantage of some 2.4 systems is the time it takes
from initial stick movement to the time the servo starts to move is very
small. Also the amount you have to move the stick to elicit a movement in
the servo is also minute. This is dependant upon of the technology of the
mfg. The amount it moves is dependant upon stick position and expo among
other things. This is the "feel". 

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of george w.
kennie
Sent: Monday, June 02, 2008 9:19 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Which servo?

Jim,

I think I'm still having some rationalizatiion issues. If I program my
servos to move slower and train my fingers to speed up their movement at the
extremes of stick travel it should produce an output somewhat similar to
what expo gives me (not quite exactly). Not that I could, in all
probability, learn to do that, but there's lots that I hear other guys say
that they can feel that always seems to escape me. Like, I just converted to
2.4 and I hear guys talking how it's so much faster feeling and more
connected. Well I can't feel any difference. It certainly works wonderfully,
but so did 72 for me. After all, isn't it only converting the frequency of
the output signal ? Wavelength propagation speed should be the same,
shouldn't it?

I still kinda feel that a two-tenth second, high power servo, with a one
micro sec deadband is not going to feel any different to me than a one-tenth
second with 10% more expo. I just ain't that smart !!!!!

When I fly something that follows the input command instantly, all I do is
over-correct and re-over-correct and twitch all over the sky and if it's too
twitchy I ultimately bury it !  The only hope for me in that situation is to
go to idle and let go of EVERYTHING !!!!

G.

----- Original Message ----- 

From: James Oddino <mailto:joddino at socal.rr.com>  

To: General pattern discussion <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Sunday, June 01, 2008 4:44 PM

Subject: Re: [NSRCA-discussion] Which servo?

Instead of programming expo try programming in lower servo speed.  I think
it will answer your question.  The best servo would be the one that followed
the input command instantly. 

Jim O

On Jun 1, 2008, at 1:21 PM, george w. kennie wrote:

A light just went off for me .............( I think).   It occurred to me
that we spend $130 for a servo with a .06 second transit time and then we
program in 60 %  expo. Somehow this seems counter productive. I'm wondering
if senility is rearing it's ugly head again.

For some unexplainable reason this doesn't induce me to go out and buy slow
servos. I know I'm going stark-raving mad !!!!!!!!!!!!!!!

G.

----- Original Message -----

From: kvelez at comcast.net

To: ron at inweld.com ; General pattern discussion
<mailto:nsrca-discussion at lists.nsrca.org> 

Sent: Saturday, May 31, 2008 11:16 PM

Subject: Re: [NSRCA-discussion] Which servo?

That is a good selection, I personally use those same servos but I like the
DS8417 in the elevator, very good if you like a fast elevator servo.

Ken

-------------- Original message -------------- 
From: "Ron Neeedham" <ron at inweldcorp.com> 

Hi guys;

I just purchased my first full sized used pattern plane.  After starting my
radio installation, I found that the servos are in various states of wearing
out.  I want to replace all servos on control surfaces.  From studying the
JR list of servos, it looks like DS8411SA is a good choice for rudder and
DS9411SA on elevator and ailerons.  Do you agree?

I have been flying an Oxalys 50 and truly love that little plane but am
anxious to try the real deal.

Ron Needham

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