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Strongest Motors on the market

Posted by Alexis on December 23, 2016 at 4:38am

Hey guys, 

We are developing a new Hexacopter and I was looking at different motors and could not decide which ones fit the best. We just need a really high Thrust to weight ratio (battery life is less important). The strongest I found were from T-motor and KDE Direct, but does anybody know other companies that sell high thrust motors?

The ones of KDE provide 2000g of thrust at 100% with 9" Props. Anything similar in this area?

Regards,
Alexis

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Replies

  • Lyn Rees January 4, 2017 at 3:31pm

    Hi again Alexis.

    I think you made a good choice.

    Although just yesterday I came across the T-motor F80 KV1900. Puts out a "claimed" 2.050kg thrust (6S) with just a 5" x 4.5" prop.

    Just the ticket for a quad racer I think:-).

    Lyn.

  • Alexis January 4, 2017 at 8:39am

    Holy Sh**!

    I think those might be a bit too large for us haha, but they are definitely strong enough! 

    We finally bought the KDE2315XF-885 and will try how they work out
    https://www.kdedirect.com/collections/uas-multi-rotor-brushless-mot...

    They seem quite strong and hopefully they are as strong as they promised. I am also looking at some Hacker motors, but since there are no thrust tests its hard to tell which ones fit the best.

    KDE2315XF-885 Brushless Motor for Electric Multi-Rotor (sUAS) Series
    <p><strong style="line-height: 1.4;">Recommended ESC: </strong><strong><a href="https://www.kdedirect.com/collections/uas-multi-rotor-electronics/pro…
  • Joe Renteria December 28, 2016 at 8:04am
    After my first reply, I also came accross these:
    https://hobbyking.com/en_us/turnigy-rotomax-150cc-size-brushless-ou...

    A third less watts for half the price. For some info on using this in a multirotor you might find this helpful:
    http://onemandrone.com

    I believe they are using this motor. I have a nice PDF with some technical information I can email to you if you like...
    Turnigy RotoMax 150cc Size Brushless Outrunner Motor
    Turnigy RotoMax 150cc Size Brushless Outrunner Motor
  • Joe Renteria December 28, 2016 at 7:53am
    No sorry, I stumbled upon those by reading about an electric powered parachute project somewhere. They said that it was equivalent to the IC enine normally used...
  • Alexis December 28, 2016 at 4:39am

    Thanks a lot for the suggestion Joe!

    Hacker seems to have very strong motors, but I looked a bit at their area of use and it looks like they have mostly been used for single motor systems such as planes or helicopters. Have you had experience using them for multicopter systems?

  • Joe Renteria December 27, 2016 at 5:23pm
    The biggest I found, 15000 watts:
    https://hackermotorusa.com/shop/brushless-motors/outrunners/a200-8/...
    A200-8 – no longer available
    Hacker is upgrading to the new Q100 and Q150 series.   Note: the A200 series is being upgraded by the new Q100 and Q150 series. The Q100 9M is a g…
  • Joe Renteria December 27, 2016 at 5:19pm
    Hacker makes some big ones:
    https://hackermotorusa.com/?v=dfd44cc06c1b
    Hacker Motor USA
    Hacker brushless motors and servos. High efficiency motors for UAV / APV / FPV and industry. Motor and servo sales & engineering.
  • Lyn Rees December 23, 2016 at 4:46pm

    I cannot vouch for Andre's experience of T motors. Maybe I have just been lucky. I tested a sample of both type I mentioned, 3520 & 3508 and the results were in the ballpark of the data sheets, even the temperature was at an acceptable level.

    Alexis said:

    Thanks for the answers, I will take a look at the link mentioned. 

    And about the T-motors. We bought a pair of the 2450 KV ones and they had similar thrust as in the official data sheet. I must say, that they got a bit hot, but I guess that is normal after some time on full thrust.

  • Alexis December 23, 2016 at 2:54pm

    Thanks for the answers, I will take a look at the link mentioned. 

    And about the T-motors. We bought a pair of the 2450 KV ones and they had similar thrust as in the official data sheet. I must say, that they got a bit hot, but I guess that is normal after some time on full thrust.

  • Andre K. December 23, 2016 at 9:13am

    During a recent bench test of new T-motor U7 v2 420kv - we burnt one surprisingly quickly (~30secs).

    The second one (tested another), by the smell of melting insulation, proved it was even unable to maintain 60% of the rated current&power before being destroyed.

    The T-Motor datasheet is simply a deceiving lie, they had same operating temperature for 50...100% throttle with the same propeller, the datasheet shows examples with propellers that are clearly more then max power, and T-motor's definition of "continuous" is 3 minutes  ... in unknown ambient temperature. 

    There is a big difference between reality and datasheets, anyone looking for performance, should actually *test* them at full throttle for some time.  

    No - during normal operation you won't be near full throttle, but if you need redundancy, the remaining motors *will* be pushed much harder.  

    There's no point for the manufacturers to get away with datasheets based on fiction.

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