In Electronics/ Multi-copter/ Reviews Posted by Mark Spencer April 04, 2014
Turnigy 5017 620kv
If you are looking for efficient, good looking multi-rotor motors specifically designed for multi-rotor application, Turnigy 5017 620kv might be the one for you.
Turnigy 5017 620kv is built with 45SH magnets, wide bell for extra torque and it comes with prop adapter which is mounted as close as possible to the brushless motor bell to reduce the well known enemy of the multi-rotors, vibrations. It comes with extra long wires so you can hide the ESC's in the center of the multi-copter and it doesn't require re-soldering of longer wires.
There appears to be two versions of the motor, older one discontinued with 5mm prop adapter shaft and new Turnigy 5017 620kv comes with 6mm shaft. Older version includes bolt-on cross mount which is not the case with the new one.
Turnigy 5017 620kv appears to be the exact clone, if not the same motor, as IPower 4008Q 620kv motor.
A little bit of theory.
Can size: 50mm
Shaft: 4mm (includes prop adapter for65mm prop mounting)
Motor Mount Holes: 16mm / 19mm
Suggested ESC: 35A
Rated Watts: 290W
Weight: 125g (Including wires, plugs)
Cell count: 3~4S Lipoly
Motor wire length: 390mm
Nicely wound 12N14P dLRK motor with Wye termination as opposed to today's usual dLRK wound with Delta termination. Clear advantage of Wye termination over Delta termination is that for the same number of turns in the winds it develops a lower RPM, while at the same time it's developing 50% more torque. Another benefit is that Wye terminated motor requires lower input power in Watts with the same load as Delta wound motor which is resulting in current dropping and better battery duration.
Looks like this motor is indeed specifically designed for the wind and termination chosen, and all that for 9 to 12 inch props for multi-copters.
Expect the current consumption and power (in Watts) number for this motor to be relatively low for the power delivered thanks to increased torque.
Here is the table with 3S and 4S batteries and with several different props
|3S||APC 9x6 SF||6285 RPM||11.70V||8.65A||100W|
|4S||APC 9x6 SF||7840 RPM||15.65V||14.53A||226W|
|3S||APC 10x4.7 SF||6245 RPM||11.64V||8.65A||100W|
|4S||APC 10x4.7 SF||7970 RPM||15.80V||14.10A||223W|
|3S||GP 10x4.5||6055 RPM||11.45V||9.45A||107W|
|4S||GP 10x4.5||7629 RPM||15.43V||15.40A||238W|
|3S||GP 10x7||5584 RPM||11.16V||12.33A||138W|
|4S||GP 10x7||6623 RPM||15.23A||16.77A||256W|
|3S||GP 11x4.5||5564 RPM||11.90V||11.79A||130W|
|4S||GP 11x4.5||6614 RPM||19.19V||17.56A||249W|
|3S||GP 11x4.7||5585 RPM||11.12V||9.21A||102W|
|4S||GP 11x4.7||7487 RPM||14.98V||14.45A||217W|
All in all, these appears to be excellent motors for multi-rotor application.