Prop Size and Pitch

Discussion in 'CineStar FAQ - Tips and Tricks' started by Josh Lambeth, Sep 1, 2012.

  1. Marc BRACELET

    Marc BRACELET Active Member

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    Super Andy, I saw the trailer of your DVD on QC.us (one of my favorite online store ...) but did not know it 'was one of your productions, congratulations anyway.
    I think the idea of ??making a product for heavy configurations is a very good thing, because there is a big difference in a lot of points as for examples: the electrical wiring, the ESC, propellers, engines (and new engines 24 or 28 poles), personally, I find a pity that builders do not be addressed on the realization of Multirotor's ESC specially dedicated to a perfect true linear response curve... Luckily SimonK exists. .. If you want other more technical information I advise you to get in touch with my mentor here with the email address: (In MP) his name is Walter.
    Large configurations have no secrets for him and he has devoted his existence to do research in this area. I think you should send him a message from me explaining your future project and I think it will give you great advice. I have had the chance to know this person, my turn to introduce you ...

    ps : he speaks English perfectly, not like me...:)

    All the best For your DVD and future DVD.

    Marc.
     
  2. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Thanks, Marc. I lived in France for almost four years (Ferney Voltaire, Pay du Gex back in the early 70's), so between what I remember, Google translate, etc, I'm sure that I'll have no problem with Walter.

    And, by the way, your written English is far, far better than my written French. Merde alors! Je écrire le français comme un imbécile. :)

    I had seen your posting regarding SimonK and linear response curves etc. -- it made me feel quite ignorant. Fortunately, feeling ignorant has never stopped me before -- I take the position that ignorance can be fixed (on the other hand, stupidity is for life!).
    Thanks for the introduction -- I'll contact him as soon as I have gooped (technical term) the MK boards with conformal acrylic spray!

    Andy.
     
  3. Marc BRACELET

    Marc BRACELET Active Member

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    If you do not know well SIMONK, watch this video which is a test between normal ESC and Reflashed SIMONK ESC. You will see the tester sends very close current pulses to the ESC (as would a CF card do to stabilize Multirotor)

    Normally you should see ... the magic !
    And you will understand why I do not want to fly with normal ESC ...

     
  4. Marc BRACELET

    Marc BRACELET Active Member

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  5. Howard Dapp

    Howard Dapp Active Member

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    This is why we are anxiously waiting for the Autoquad team to finsish up testing on their ESC specifically designed for multirotor use. Currently they are testing 12C functionality for us MK guys. Rated at 40-50A with adequate cooling. This ESC will be a huge deal for the multirotor community.

    http://autoquad.org/esc32/
     
  6. Daniel garate

    Daniel garate Member

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    This are the props im using now
    APC THIN ELECTRIC PROP 13X6.5 EP

    Flight time is the same, and im running 2 x 6000 nanotechs in parallel.
     
  7. hugy

    hugy New Member

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    Get the 14x5 xoar props. The apc thin electric props are way to heavy to react fast enough. From my air and bench testing the xoar 14x5 are about 10% more efficient then the apc 14x4.7 props. They pull about the same amps. So your setup should be running cooler and longer.
     
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  8. Josh Lambeth

    Josh Lambeth Well-Known Member

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    Good info. Thanks Hugy!

    josh
     
  9. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Do you find that you need to balance the Xoar 14x5 props? I don't have any experience with them.

    Thanks
    Andy.
     
  10. hugy

    hugy New Member

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    They are balanced pretty good from factory, most of the times I just put them on and fly with them. But I have balanced some but the needed only 1 or 2 small tape pieces.
     
  11. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    Hugy: Oh -- I thought you'd sand off some of the "heavy" blade -- but it sounds like that's not the way to do it with beechwood props.

    Thanks
    Andy.
     
  12. hugy

    hugy New Member

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    I never sand my props, I always use small pieces of tape. But these xoar props are varnished, so if you sand them you will remove the varnish and they will be affected by moisture.
     
  13. Andy Johnson-Laird

    Andy Johnson-Laird Administrator
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    I was wondering about that. I think I might convert over to Xoar's once I'm more confident that I'm not going to trash props too often! :rolleyes:
     
  14. kjetil tønnesen

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    i use the 13x6,5 carbon props and 5cell lipo and it works great
    i just wounder to try the new 14x4,7 slowflyer carbon props too
     
  15. Peter Gøthche

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  16. kjetil tønnesen

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    these props looks great i think and a nice price too:)
     
  17. Peter Gøthche

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    Hi i made some tests today and i flew about 7 min on 2x 5800mHa with the apc 14x4,7, then changed to xoar 13x6,5 an got. About 10 min of flight on the same battery
    And ther was no change in performance

    I would really like to se a big test of defreand propellers and shapes
     
  18. Pavlos Antoniou

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    To order the 14x5 Xoars or not to order??? :) :)

    How are they in wing??! I wish they are better than the 14x4.7 SF.. right?
     
  19. Peter Gøthche

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    I dont know how much you have to lift but i would go for the 13x6,5
     
  20. Pavlos Antoniou

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    Ihave the 13x6.5 but i havent tried them...1 Everyone say that the props are not good as the 14x4.7 ...!

    Also i have to lift 7.5kg because my cam is 1.2kg..!
     

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