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  1. UK F3F Contest Entries

    All UK F3F contest dates and entries will be posted here.

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497 topics in this forum

  1. English Open 2016

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  2. Pyrenees Cup 2016 1 2 3 4

    • 70 replies
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  3. Open F3B Speed Contest 15th/16th October 2016

    • 0 replies
    • 810 views
  4. F3B UK is it dead ? 1 2

    • 20 replies
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  5. F3F Rules

    • 15 replies
    • 2k views
  6. Vampire Programming

    • 18 replies
    • 2.5k views
  7. Getting Cerious 1 2

    • 24 replies
    • 3.9k views
  8. F3F Lemoncello Cup, Col de Tende, France

    • 1 reply
    • 997 views
  9. Merlin magic! 1 2 3 4 5

    • 86 replies
    • 18k views
  10. F3F South England Open 2016

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    • 1.3k views
  11. F3F Eurotour 2016

    • 7 replies
    • 1.7k views
    • 0 replies
    • 701 views
  12. F3F in La Muela

    • 0 replies
    • 805 views
  13. Planning a bit for the mag

    • 10 replies
    • 1.5k views
    • 0 replies
    • 706 views
  14. 2016 EPP Nats 1 2

    • 38 replies
    • 4.5k views
    • 0 replies
    • 815 views
  15. Sloping Denmark May 27. - 29. 2016

    • 2 replies
    • 1.1k views
  16. Shinto f3f

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    • 1.5k views
  17. Design data needed

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    • 1.6k views
  18. F3F Model carry bags

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    • 2.2k views
  19. F3F Team Manager

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    • 709 views
  20. Dutch F3F competition dates Fall 2015

    • 4 replies
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  21. F3F Eurotour 2015

    • 1 reply
    • 834 views
  22. old school f3f electra b3

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    • Stormeflyer
      Yes you are correct, the method in the video wouldn’t give telemetry that a battery had failed, I’ve looked on the RC Groups and read this: ’The system I use now is with one of the TI zero forward voltage drop devices (TI SM74611KTTR) for the 1S path and a surface mount Schottky for the BEC path, with a 380mAh Tatu 1S (Amazon) for the back-up battery. I tested my big glider airborne systems down below 3.5V, and with the zero drop device in the 1S back-up path, that gives me lots of time (20 minutes+) to finish a task and make a safe landing even after telemetry notifies me of the voltage drop on to the 1S back-up. Keep in mind the servos will be slower and less powerful on 1S voltage, so careful use of the big flaps on an F5J plane will be required’  
    • MikevE
      Pretty much the same way - you get a drop in voltage. In my glider's case, I'm measuring the voltage of the LiPo via the TGE telemetry sensor.
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