[NSRCA-discussion] Servicing Servos

Mon May 17 10:18:13 AKDT 2010

The electrics are much easier on pots, but there are other issues.  I once
had a customer that had two of his own design F3A models.  All wood.  One
model would get about 150 flights and the other would wear out aileron pots
in about 30 flights.  Long story, but the bottom line was that the only
difference between the models was the position of the aileron servos.  On
model had the servos very close to the end of the wing tube and that was the
one that had the short life on the pots.  We had to conclude that some
harmonics due to the tube was causing the issue.  He later moved the
location to where the other models' aileron servos were, and the problem
went away.

Tony Stillman, President

Radio South, Inc.

139 Altama Connector, Box 322

Brunswick, GA  31525

1-800-962-7802

www.radiosouthrc.com

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Jon Lowe
Sent: Monday, May 17, 2010 2:07 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Servicing Servos

I have to have aileron pots changed after 150 to 200 flights since I
switched to YS from an OS 1.60.  Running DS9411sa's.  I get noticeable
hesitation in movement around neutral.  The servo acts like it is
stuttering.  I generally change aileron servos for ones with fresh pots
right before the Nats.  I like the 9411's in all other respects, and I
suspect that the pots wear because they are driven directly from the output
shaft, rather than indirectly, plus the YS shakes the bejesus out of the
ailerons.  The DS3421's I use on elevators never seem to wear out pots, even
though they are much smaller and are also direct drive.

Jon Lowe

-----Original Message-----
From: Atwood, Mark <atwoodm at paragon-inc.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Mon, May 17, 2010 12:27 pm
Subject: Re: [NSRCA-discussion] Servicing Servos

I assume the number changes for Glow vs Electric?  If so, is that 100-200
typical for Glow or E?  And what should we expect from the other?

-Mark

Mark Atwood

Paragon Consulting, Inc.  |  President

5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124 

Phone: 440.684.3101 x102  |  Fax: 440.684.3102

mark.atwood at paragon-inc.com  |  www.paragon-inc.com
<http://www.paragon-inc.com/> 

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org
<mailto:nsrca-discussion-bounces at lists.nsrca.org?> ] On Behalf Of colin
chariandy
Sent: Monday, May 17, 2010 1:26 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Servicing Servos

Thanks Tony.

Is the Pot replacement the only work needed to recover the performance and
give another 100-200 flights?

Colin

--- On Mon, 5/17/10, Tony <tony at radiosouthrc.com> wrote:

From: Tony <tony at radiosouthrc.com>
Subject: Re: [NSRCA-discussion] Servicing Servos
To: "'General pattern discussion'" <nsrca-discussion at lists.nsrca.org>
Received: Monday, May 17, 2010, 12:44 PM

Colin:
I do a lot of competition pattern servos here at Radio South.  Most of the
time, you will be able to get 100-200 flights on servos, however there are
some that say they can feel degradation of centering in as few a 30 flights.
Most of the time, replacing a pot will cost you around $20 per servo.

Tony Stillman, President

Radio South, Inc.

139 Altama Connector, Box 322

Brunswick, GA   31525

1-800-962-7802

www.radiosouthrc.com

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org
<mailto:nsrca-discussion-bounces at lists.nsrca.org?> ] On Behalf Of colin
chariandy
Sent: Monday, May 17, 2010 12:12 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Servicing Servos

Generally, are people servicing their servos? How often (for glow powered
airplanes) and does the service correct chatter about the centre?

Where is a good place to send Futaba Servos and what's the typical cost and
turn around time?

Thanks

Colin.

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