[NSRCA-discussion] Aileron servo arm size and resolution?

[Fred Huber]

if you have to use 50% ATV, you are effectively getting 50% torque and 50% 
resolution.

If you need more servo speed, you need a faster servo, not to goof around 
with the linkages.

Maybe the use of 6.0 V RX pack instead of 4.8 V, as that increases speed 
significantly (if your servo can handle the voltage) and increases MOTOR 
power. (does not increase gear train strength... so I would not count on 
more torque than with the 4.8v)  Increasing the motor power and speed comes 
at a cost of increased heat and a need for a higher capacity battery.

You should get your full surface travel (high rate) as close to 100% ATV 
setting as possible.  ATV is a trap and if abused can lead to some really 
bad control system installations.

FHH
----- Original Message ----- 
From: "Kelly Regan" <kelly.regan2 at verizon.net>
To: <NSRCA-discussion at lists.nsrca.org>
Sent: Wednesday, January 03, 2007 8:14 PM
Subject: [NSRCA-discussion] Aileron servo arm size and resolution?


> What length servo arms do you run on the ailerons?
>
> Why do I ask....
>
> When I first set up my Brio with the 9411 sa's on the ailerons
> I wanted to make sure I had full servo/radio resolution.
>
> I fly with a Futaba 9C and have CHP control arms on the ailerons.
>
> I set my ATV or End Point in the 9C to 130.  I used a standard JR
> servo wheel with the linkage set to the inner most hole.  In order to
> get the 1/2" aileron travel per the Brio manual I ended up with 120%
> duel rate.  It was my understanding that this is exactly what I wanted.
> High ATV and high duel rate for full resolution?
>
> When Don flew my plane he said the aileron servo's seemed slow
> to him?  He was surprised to hear I had 9411sa's.    He suggested
> that I use longer servo arms and reduce the ATV to 100% to make
> the to keep the throw at 1/2" while increasing the surface speed.
>
> Tonight I installed the shortest Dubro arms with the linkage on the inner
> most hole.   That put the numbers at 100% ATV but I had to reduce
> the duel rate way down to 50% to get the same 1/2" throw.
>
> Am I wrong in assuming that cuts my resolution in half?
>
> I wanted to get you opinions on since I am now totally confused.
>
> What does a faster aileron speed do for me versus the loss of resolution?
> What is an acceptable loss in resolution to gain the speed?
>
> Thanks for you help
>
> -- 
> ______________________________________________
>
> Kelly Regan
> www.reganbrothers.com
> Home Page: http://mysite.verizon.net/vze6uror/
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