[NSRCA-discussion] interference

[Pete Cosky]

Jerry, I lost a 40 size Ultimate and a Prophecy due to a single bad switch. Both planes were fine on the ground and as soon as climb out started the controls went dead. Who ever thinks a switch would be the culprit but after the Prophecy went in the same way put all the radio gear together on the bench and hooked it up to my oscilloscope. I found the switch to be glitchy and it got worse when I introduced vibration.

I now used regulated power with safe switches.

Hope the parable helped.
  ----- Original Message ----- 
  From: jfgreen 
  To: 'NSRCA Mailing List' 
  Sent: Monday, February 19, 2007 7:43
  Subject: Re: [NSRCA-discussion] interference


  Keith,  No need to have used a hammer on that RX it was obliterated when I scooped the two garbage bags full of debris.  I immediately sent the JR 10X to Tony and ordered a dual conversion RX w/ full explanation of the event.  Jaccio switch, parsons clips and a two year old Duralite battery.  Not glitch before the crash.  It acted like a battery died.  Went into first loop of Cuban eight.  Loop opened up (blowback) slow rolled over and dove in.  No control on sticks, throttle stayed where it was at beginning of maneuver.  THX Jerry

   


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  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Keith Black
  Sent: Monday, February 19, 2007 4:27 PM
  To: NSRCA Mailing List
  Subject: Re: [NSRCA-discussion] interference

   

  Jerry,

   

  I've personally had no problem with steel pull-pull cables, however, I've also been careful to keep the antenna away from the pull-pull cables by several inches.

   

  Do you understand what occurred with your last incident?  I've heard of people losing  their replacement plane because they didn't realize they had either a bad TX or bad RX and they used them in the replacement plane. Therefore, if I were you I'd focus on making 100% SURE that none of the components used before (that you plan to use again, including TX) are faulty. 

   

  I'm not quite this hard core, but Earl Haury once told me that when he has a crash he takes the RX home and introduces it to his hammer. This would certainly prevent any problems with the RX (either causing the crash or caused by the crash) from downing any future planes. 

   

  Keith Black

    ----- Original Message ----- 

    From: jfgreen 

    To: 'NSRCA Mailing List' 

    Sent: Monday, February 19, 2007 5:46 PM

    Subject: [NSRCA-discussion] interference

     

    In an effort to avoid turning my new pattern ship into a dirt seeking comet similar to my last Oly, I’ve been researching some possible causes,  I recently read from one source that one would or could have interference problems if when using steel pull-pull cables and installing the antenna parallel to them inside the fuse.  I have seen a number of AC at contests w/this configuration that seem to have no interference problems.  Your  experience, thoughts please.  THX - Jerry

     

     

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