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F3F/F3B

Talk about F3F and F3B here.

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  1. UK F3F Contest Entries

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

    8,443
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490 topics in this forum

  1. F3F videos. 1 2 3 4 14

    • 272 replies
    • 67,215 views
    • 339 replies
    • 64,619 views
  2. How to acquire Tungsten ballast ?

    • 6 replies
    • 196 views
  3. Merlin Acquired

    • 1 reply
    • 143 views
  4. Avalon Build & Flight Log 1 2

    • 36 replies
    • 1,054 views
  5. Freestyler 6 1 2 3 4

    • 61 replies
    • 6,586 views
  6. Looking for a model 1 2

    • 29 replies
    • 1,031 views
  7. Exit strategy

    • 5 replies
    • 378 views
  8. Foam cores

    • 4 replies
    • 243 views
  9. Iceland Open F3F 2020 WC/ET

    • 3 replies
    • 329 views
  10. Wing ballast stuck

    • 18 replies
    • 335 views
    • 0 replies
    • 113 views
  11. Quantum F3F 1 2 3

    • 40 replies
    • 2,715 views
  12. Wanted spares / damaged airframe

    • 0 replies
    • 207 views
    • 12 replies
    • 305 views
  13. How to unplug sticky wings? 1 2 3 4 6

    • 117 replies
    • 6,679 views
  14. Woollyback? 1 2 3

    • 50 replies
    • 2,226 views
  15. Pitbull2

    • 9 replies
    • 793 views
  16. New World Cup Contest 2020 - the TOA Race F3F

    • 0 replies
    • 298 views
  17. Left Wing Freestyler 3

    • 0 replies
    • 298 views
  18. F3B video

    • 4 replies
    • 471 views
  19. F3f (RCM&E) tabards

    • 1 reply
    • 355 views
  20. 2.5m to 3m sports sailplane recommendations

    • 12 replies
    • 929 views
  21. Eldorado F3F/F3B - Jaro Muller

    • 7 replies
    • 702 views
  22. World Cup / Eurotour 2020 in Denmark

    • 0 replies
    • 336 views
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  • Posts

    • Mark Evans
      Hi guys, So, flying the Auri and the spec sheet cg recommendation is 63-64mm. I am currently at 65 but I can visibly see some up trim in my elevator. A dive test shows it just pulls up slightly, not as much as I would have imagined though with the up trim I can see by eye.   Flying along I find it flies hands off ok but does nose up, even flying downwind and I have to push on the stick a bit to stop it stalling. But I can park it upwind and it will sit there for a while pretty steady. Maybe I’m just catching the lift up going downwind and nosing up into it? (I find this highly unlikely though)    At this point would you change anything? I thought about trimming the elevator dead flat and getting a level flight via nose or tail weight but I think this would put the cg quite far back from what’s suggested. When would you shim the elevator to correct any possible decalage issue?    Thanks in advance. 
    • mikef
      I decided to compare the ‘plane slow‘ start with the ‘plane middle' start on the bench.  'Slow' first, prop-off (indoors)  and it starts instantly.  No point trying  'middle' on the bench, it couldn't be any quicker.  Does this tell me anything? (I didn't mention before, there's an AMRT in the esc to Rx line but it wasn't there when I first flew the model and the start delay was always there.) What I'm getting with the prop on is a delay (possibly a variable delay?) rather than a slow wind-up.  Does anyone else get a delay, (of about a second) after slamming to full throttle, before the motor starts?  I have the throttle set to full and then switch the throttle cut off to start. Can anyone explain the difference between the effects of startup speed and startup power please? Could the ESC be faulty - has anyone else got a similar ESC - if so, please, what are your settings? I'll try a change to the settings and test it  prop-on when the wind drops a bit.
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