[NSRCA-discussion] Chasing glitches (was Lost Abbra)

[Fred Huber]

well.. that may have something to do with it.... the batt lead parallels the 
ESC leads in and out for a bit (runs right beside the ESC)  and the 
out-of-plane tests may have had that porion of wire just far enough away. 
(velcro strapped the esc right over the batt wire in the plane)  And... I 
may have realigned the batt wire slightly when I put the batt back in after 
a cycle check. (and then I'd have kept putting it back the new way)

Will try running the batt wire down instead of up... which will give me appx 
4 to 5 inches separation

At least its something new to try...

----- Original Message ----- 
From: "Dean Pappas" <d.pappas at kodeos.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, August 07, 2006 10:34 PM
Subject: Re: [NSRCA-discussion] Chasing glitches (was Lost Abbra)


> Hi Fred,
> Does your control wire for the ESC run right along with the power input 
> leads to the ESC?
> Make the servo lead turn at right angles to the high current leads, and 
> run it as far away from the big wires before it runs aft to the RX. That 
> worked for me.
> regards,
> Dean P.
>
> -----Original Message----- 
> From: nsrca-discussion-bounces at lists.nsrca.org on behalf of Fred Huber
> Sent: Mon 8/7/2006 1:30 PM
> To: nsrca-discussion at lists.nsrca.org
> Cc:
> Subject: [NSRCA-discussion] Chasing glitches (was Lost Abbra)
>
>
> I'm currently chasing a RX problem which nearly cost me the plane.
>
> Many flights with no radio problems.  (had a couple of instances of 
> covering comming lose on the ARF....)
> Goofe up and caused a servo to over-travel stripping a gear, so I replaced 
> the servo.  3 flights after that with no radio issues.  Then I stuck in an 
> RX volt-watch device.  2 more flights no problems.
>
> Got to flying it around the last time it was in the air and the plane 
> started glitching, so I landed.  When the plane stopped at the end of the 
> runway (less than 75% of my normal antenna down range check distance) 
> controls went absolutely nuts, including throttle. (which is really 
> strange because its an electric model)
>
> When the glitching occurs, it pulls the volt-watch meter down to the 
> lowest indicating light.
>
> The plene:
> Quest 3D G2
> AXi 4120/18 using Jeti 70 amp ESC
> Hitech Supreme 8 RX
> 4 Blue Bird 621 servos (90 in oz)
> 2700 mah 4-cell NiCd RX battery (ESC has no BEC function)
> 2 X 3s 3600 mah LiPo for 6s power (appx 11 to 12 min of Sportsman level 
> Pattern per charge)
>
> Polks Tracker-III TX
>
> I've swapped out every servo (I have 4 spares)
> I swapped to a Futaba 127 DF RX and to a Polks Seeker-II and a Seeker 6
> Changed the switch harness to an MPI heavy duty with volt indicator.
> Changed to a 900 mah 4-cell NiCd for the RX
> Tested with and without the volt-watch
>
> Only had one good range check since the problems started with an RX 
> anywhere near the airplane, that was with just the motor and the rudder 
> servo plugged in. (original RX)
>
> Wierd part... the whole radio system works fine if I pull it out of the 
> plane and lay it on the ground similar to how its laid out in the plane., 
> including the long servo extensions for ailerons and elevator an the motor 
> system. (put it back and the glitching is back)  This is repeatable with 
> any combination of the servos I have.
>
> The other RX's tested all work in the planes they are normally used for.
>
> TX operates all other planes I have with no issues. (I only use 2 
> frequencies even though I have a few synth RX's and the TX is synthesized)
>
> Current antenna down range check is 50% of my norm, so I don't dare fly 
> it.
>
> I've been thinking of putting together "glitch busters" ( 
> http://www.uoguelph.ca/~antoon/gadgets/gadgets.htm ) for use on the long 
> lead channels, but can't see why I should need them if the system worked 
> for appx 3 months without them.  I have had a plane with exgensions that 
> added up to right  at 1 meter where the devoces cured problems , but those 
> existed from first time the radio was plugged together.
>
>


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