Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Can I fly with 2 carbon props, 2 plastic?

Discussion in 'General Discussion' started by Flyindubs, Dec 28, 2015.

  1. Flyindubs

    Joined:
    Dec 24, 2015
    Messages:
    12
    Likes Received:
    3
    I have no idea HOW I missed it but apparently the carbon fibre props I bought on the DJI website only come with 2?! How silly... but I guess I didn't read enough... I thought $15 seemed low for these bad boys.

    Anyway, can I fly with 2 carbon and 2 plastic? Or is that going to mess up the flight stability or something? I guess I should just order two more but... just wondering.

    Thanks!
     
  2. natvtrader

    Joined:
    Aug 16, 2015
    Messages:
    87
    Likes Received:
    28
    I would think you could fly with mix matched props it might just throw your drone off balance a little. Maybe cause some vibration?
     
  3. ianwood

    ianwood Taco Wrangler
    Staff Member

    Joined:
    Jan 7, 2014
    Messages:
    4,916
    Likes Received:
    1,790
    Location:
    Lost Angeles
    Don't mix and match props. Only fly with 2 sets of the same matched pairs.
     
  4. Great Pumpkin

    Joined:
    Feb 23, 2014
    Messages:
    405
    Likes Received:
    35
    Location:
    Santa Barbara County, California, USA
    Ianwood, please explain your reasoning for never flying with mixed props.
     
  5. iride4u

    Joined:
    Jun 15, 2015
    Messages:
    34
    Likes Received:
    13
    Great Pumpkin If you try to fly with miss matched sets of props. One set may have a slightly different pitch. Since the drone assumes that all props are the same this could led to control problems.
    It is not worth it just get your props from a known source that is reputable. These birds cost too much to take chances and they are a dangerous item. The blades are sharp and spinning at a high rate of speed.
     
  6. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,239
    Likes Received:
    1,613
    Location:
    Palm Beach Co.- FL
    Flying mismatched SPECED props is not advisable.

    However if they are the same spec than it's less of an issue.

    The specific difference here would be stiffness of the props. While not optimal it would allow flight and 'get you off the island' in a pinch.

    Each ESC/motor/prop combo is a separate control output 'channel'.

    If one channel is providing more lift/thrust then the others can compensate but this comes with some type of compromise be it efficiency, stability, etc.
     
    #6 N017RW, Dec 28, 2015
    Last edited: Dec 28, 2015
  7. Great Pumpkin

    Joined:
    Feb 23, 2014
    Messages:
    405
    Likes Received:
    35
    Location:
    Santa Barbara County, California, USA
    Perfectly reasonable explanations. Thank you.
     
  8. Buckaye

    Joined:
    Aug 24, 2014
    Messages:
    1,557
    Likes Received:
    420
    Location:
    Orlando
    I'm just kind of curious as to why you are considering this? What are you hoping to gain?
     
  9. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,239
    Likes Received:
    1,613
    Location:
    Palm Beach Co.- FL
    Don't see it that way.

    Maybe [he is] just wondering why Ian advised agaist it.
    He's not even the OP.
     
  10. Matthewd5

    Joined:
    Aug 2, 2015
    Messages:
    79
    Likes Received:
    5
    I wouldn't try it, but if you do have a video going so we can see the results
     
  11. Buckaye

    Joined:
    Aug 24, 2014
    Messages:
    1,557
    Likes Received:
    420
    Location:
    Orlando
    Oh I meant the question for the OP... my bad
     
  12. Nathan1994

    Joined:
    Oct 4, 2015
    Messages:
    72
    Likes Received:
    21
    Location:
    Pleasanton, CA
    Just my opinion, but I wouldn't do it. I understand wanting to try out your new carbon props, but wait 'till you get 4 of them.
     
  13. WetDog

    Joined:
    Oct 18, 2015
    Messages:
    1,491
    Likes Received:
    640
    I want you to try them .... It's the only way to be sure.
     
  14. natvtrader

    Joined:
    Aug 16, 2015
    Messages:
    87
    Likes Received:
    28
    Ask and you shall receive. Well in some cases anyway. So after the question was asked I had to see for myself if you could since the basic answer was "no you can't or no you shouldn't", well apparently you can. Now I wouldn't advise doing this because the quad was very unstable. I was standing close to my house and I have an all metal roof so I don't know if that played a roll with interference? Again I can't imagine why anyone would want to fly this way and I wouldn't recommend it but it can be done. One other factor is I have never balanced any props.

     
  15. WetDog

    Joined:
    Oct 18, 2015
    Messages:
    1,491
    Likes Received:
    640
    Looked a bit windy though. Might have played into it. Now, to do this correctly you need TWO Phantoms, one with the different props and a control. Need to fly them at the same time.

    So, now you have an excuse to get another bird.....
     
  16. ianwood

    ianwood Taco Wrangler
    Staff Member

    Joined:
    Jan 7, 2014
    Messages:
    4,916
    Likes Received:
    1,790
    Location:
    Lost Angeles
    It's just a bad idea. It may fly but it will be unstable. The flight controller assumes equal thrust capabilities on each motor. Props of different material and/or shape/casting will behave differently.

    You could use different props on a custom mix but that is usually only in a coaxial configuration.
     
  17. WetDog

    Joined:
    Oct 18, 2015
    Messages:
    1,491
    Likes Received:
    640
    Of course it's a bad idea. But looking at the props, they have the same shape - at least to a close visual inspection. They weigh the same - 12 grams. So you can do it - as natvtrader has shown.
     
  18. ianwood

    ianwood Taco Wrangler
    Staff Member

    Joined:
    Jan 7, 2014
    Messages:
    4,916
    Likes Received:
    1,790
    Location:
    Lost Angeles
    Different material. Different flight characteristics. You have nothing to gain and a lot to lose. Bad idea. I'll leave it at that.