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Failsafe Problems with 35mhz Futaba T9CP

Posted by Zeke Zero on February 22, 2014 at 12:30pm

I have run into a problem when trying to get failsafe to work with my Futaba T9CP 35mhz Tx and  FP-R138DF Rx.

I have set the parameters correctly however, there is so much interference once I switch the Tx off that failsafe will not initialise.  All of the channels fluctuate a lot including 3 (throttle used for failsafe) and 8 (used for flightmode selection).  This has the  effect of the APM switching between flight modes randomly - a fine recipe for a crash if I were to fly out of Tx range.

Can anyone suggest a fix for this or have I just chosen the wrong Tx/Rx for what I want to achieve?  (My choice of 35mhz was made at an early stage because I read that range was a strongpoint AND I am in the UK so 2.4Ghz video Tx is my preference). 

P.S.  My Mavlink OSD stopped working tonight as well.  Think I may have fried it as I never checked VCC was <5.25V... you live and learn!

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Tags: 35mhz, failsafe, futaba, interference, rth, t9cp
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Replies

  • Marc LE BRET February 23, 2014 at 8:48am

    No luck with your receiver,

    If you want FailSafe with classic Futaba radio, you have to go to PCM receiver.

    • Zeke Zero > Marc LE BRET March 23, 2014 at 2:46pm

      Thankyou Marc,

      I purchased an R149 PCM rx and failsafe works perfectly now.

      :)

      • Marc LE BRET > Zeke Zero March 24, 2014 at 12:24am

        Thanks for the feedback,

        Marc

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