quadcopter configuration opinion

Discussion in 'General Discussion' started by miky94, Feb 15, 2018.

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  1. miky94

    miky94 Active Member

    Hi,
    I'm newbie in quadcopter's world and I'm starting building my first one, I was undecided between 450mm and 250mm frame, so I decided for a F330 frame because I think it's a good compromise of stability/maneuverability for a versatile drone (fun flying/photographing).
    I think there's enough space to carry what I need (a camera, maybe some sensor), so I can save weight then autonomy, and I can easily upgrade it to a 450mm frame only by changing arms and propellers.
    On DJI site for the F330 frame they recommend 2212 motors and 8045 propellers, so I opted for 920Kv motors (like dji FlameWheel330):
    - 8045 propellers
    - 2212 920Kv motors
    - 30A Simonk ESCs (for the future)
    - MultiWii FC (I need one written in Arduino)
    - 3000mAh 3S 20C LiPo

    Furthermore, to prevent mid-flight shutdowns, I'm looking for a low battery voltage alarm, e.g. buzzer or led, do you know anyone?
    and since I haven't it, is there a battery-ESCs connector with which I can avoid buying a soldering iron?

    What do you think about this configuration?
    If motors are ok , are there differences between various motors brands?
    Otherwise, for what Kv or motor size should I look for, considering an eventual future upgrade to 450mm ?
    Thanks
     
  2. mozquito1

    mozquito1 Well-Known Member

    Avoid buying a soldering iron, o_Owhat?
    What are you thinking. :rolleyes:
    Your going to need one.
     
  3. miky94

    miky94 Active Member

    I know that is a must, I just wanted to know if are there alternatives connectors less "definitive".
     
  4. RENOV8R

    RENOV8R Well-Known Member

  5. miky94

    miky94 Active Member

    Thank seems what I was looking for.
    What do you think about motors?
     
  6. RENOV8R

    RENOV8R Well-Known Member

  7. miky94

    miky94 Active Member

    Ok for sizes, and what about Kv?
    Unfortunately it doesn't ship to my country, anyway these seem expensive, I've found others that cost 3 times less!
    At equal sizes and Kv, what differentiates brands and costs? Efficiency?
     
  8. RENOV8R

    RENOV8R Well-Known Member

    Umm, that works out to $12 per motor. So if you've found 2212 900kv motors for $4 each well. good luck with that.
     
  9. miky94

    miky94 Active Member

  10. RENOV8R

    RENOV8R Well-Known Member

    Like I said, good luck. At that price, better buy a couple extras
     
    mozquito1 likes this.
  11. mozquito1

    mozquito1 Well-Known Member

    You can't even buy dys1806 for less than that. & there about the cheapest I'd go for. We think you need a rethink on them motors.
     
  12. RENOV8R

    RENOV8R Well-Known Member

  13. miky94

    miky94 Active Member

    Is my first drone, these motors don't have to last a lifetime. If they fly well, they will be fine. I'm more interested to choose the right specs
     
  14. RENOV8R

    RENOV8R Well-Known Member

    The specs are OK for your build, I predict that 3 out of the 4 motors will work just fine
     
    Rick M likes this.
  15. miky94

    miky94 Active Member

    is it the same for batteries? with same specs, are there any differences that justify low / high price? which batteries brands are best?

    I found this one with good price / mAh / C-Rating / weight, I only have to buy a Deans-XT60 connector adapter
    http://www.dx.com/it/p/high-capacity...8#.WoozzqjOVPY

    What do you think about it?
     
  16. Jackson

    Jackson USA member at large

    I bought 5 of those golden motors for my tricopter, surprising powerful. Still got 3 that work fine and one with a bent shaft. :)
     
  17. miky94

    miky94 Active Member

    are there better alternatives to the multiwii fc always Arduino written?
     
  18. photojunky

    photojunky Well-Known Member

    I would stick to known Brands and reputable companies. I don't know if that was said later in this thread because due to my ADD I did not read all of it, but that would probably be your best bet. I bought a couple of cheap Motors off of eBay from some unknown company, and one sounded like a roller skate, and another lasted about 20 or 25 minutes before also sounding like a roller skate.
     
  19. miky94

    miky94 Active Member

    I have to buy a deans connector wire for the battery to solder to the bottom board, but online I read incongruity about AWG and ampacity, considering I have 30A ESCs which AWG I need ?

    As both motors and ESCs have enough long wire, I'm thinking about putting the ESCs in the middle instead of on the arms to minimize wires slack , protect the ESCs inside, and have better center of gravity (maybe?), what do you think about it ?
     
  20. Jackson

    Jackson USA member at large

    It's not about the ESCs, it about what amps your motors draw.
     

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