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Builders Workshop

Model building techniques and tips, covering and finishing, machining, plans etc.

465 topics in this forum

  1. Zagi LE

    • 15 replies
    • 1,000 views
  2. Z bend pliers 1 2

    • 21 replies
    • 2,562 views
  3. Yet another molded fus repair - with pics

    • 9 replies
    • 993 views
  4. Xplorer flap horn repair

    • 12 replies
    • 832 views
    • 16 replies
    • 1,584 views
  5. World Record Paper Glider

    • 1 reply
    • 165 views
  6. Wombling Corner

    • 9 replies
    • 563 views
  7. Wobbly wings - Willow 1

    • 3 replies
    • 841 views
  8. Wizard nose job

    • 3 replies
    • 705 views
  9. Wizard Compact

    • 5 replies
    • 1,405 views
  10. Wiring a new wing

    • 3 replies
    • 662 views
  11. Wire stripping

    • 8 replies
    • 678 views
  12. Wipers, replace/repair question 1 2 3

    • 53 replies
    • 3,337 views
  13. Winter project

    • 6 replies
    • 756 views
  14. Wingtip repair

    • 19 replies
    • 1,044 views
  15. Wings and tail, what to do...

    • 1 reply
    • 379 views
  16. Wing-bags - how to make?

    • 17 replies
    • 1,633 views
  17. wing tip peg

    • 3 replies
    • 125 views
  18. Wing skin repair

    • 0 replies
    • 701 views
  19. Wing Servos Not Square?

    • 9 replies
    • 896 views
  20. Wing Servos - making them easy to get out 1 2 3

    • 46 replies
    • 2,794 views
  21. Wing Servo's 1 2

    • 34 replies
    • 3,232 views
  22. Wing servo installation terror

    • 6 replies
    • 971 views
  23. Wing retaining 1 2 3 4

    • 64 replies
    • 908 views
  24. Wing repair help (veneered foam)

    • 18 replies
    • 1,333 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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