[NSRCA-discussion] Rudder Servo - 9152 way to go!

[Jim Woodward]

Peter,
I use the 9151's on elevator and ailerons now, and have moved to the 9152
(280 oz torque on 6.0V) on rudder.  Rest assured, you will NEVER have a
blow-back issue on a pattern plane with this servo.  The 9151 is a great
servo, and I've never had a failure with it, but the 9152 is the total
solution for F3A rudder if you don't mind the extra weight of the larger
case.  My opinion is that if you are using a digital servo, that a change in
rudder servo speed is not going to buy you anything - It is better to add
torque.  The 9152 is "overkill" in a good way in this installation.  It will
absolutely change the way your plane flys and lock it into the yaw axis.  It
will improve all aspects of flight:  pulls, rolls, tracking - and probably
cause you to add 20 points of expo, while still reducing the normal rate you
fly on to get a similar feel to the 9151.  

Also, I've been using this servo on my 42% Extra, which has huge control
surfaces, and running them at 6.5 volts as adjusted through the Smart-Fly
components (Power Expander and Super Regulator).  Not a problem yet.  The
output shat is larger than a standard servo, which is a great feature given
this is how the servo transmits torque to the servo arm.

Thanks,
Jim W.
Team Futaba
Smart-Fly


-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Peter Pennisi
Sent: Sunday, April 30, 2006 7:03 PM
To: 'NSRCA Mailing List'
Subject: [NSRCA-discussion] Rudder Servo



What is the consensus in relation to speed for a rudder servo in a 2x2 F3A
model? Does a higher speed servo yield a better snap? Do I stick with the
tried and proven Futaba S9151 which is relatively slow compared to some of
the faster servos available now which have high torque as well?

What are most people using on a 5.6 volt regulated supply?


 Regards,

Peter




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