[NSRCA-discussion] RF Interference

[Jay Marshall]

I'll go along with Tom. I have had a worn servo short out at a specific
position and take out the receiver and other servos.

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Tom Simes
Sent: Tuesday, November 07, 2006 3:04 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] RF Interference

On Tue, 7 Nov 2006 14:29:29 -0500
"george w. kennie" <geobet at gis.net> wrote:

> Hey Guys,
> Looking for some input here regarding RF interference. 
...
  When it
> first manifested itself it was in the nature of the throttle servo
> pulsing intermettently on the ground during warm-up and then it would
> smooth out and I would take off and fly and it would seem O.K. 
...
> I actually flew some flights like this and
> would experience serious glitches on the same maneuver in the same
> position within the maneuver repeatedly. It also seemed to be
> vibration related as I found that when I shut off the motor in flight
> the glitching would cease.

Just my $0.02, but I think your mechanical vibration guess fits the
evidence better than RF interference.  I've had worn servos start to
jitter on the ground and cause full scale voltage deviations on a
voltwatch as they thrashed trying to center.  I've also seen oxidized
connectors on a fun fly that needed to be plugged and unplugged 8-10
times before the servo acted normally (first flight of the season - not
my plane!).

Sorry to hear about the crash - 

Tom
 
======================================================================
   "Z-80 system stack overflow.  Shut 'er down Scotty, the system's
         sucking mud" - Error message on TRS 80 Model-16B

Tom Simes                                       simestd at netexpress.com 
======================================================================
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