KB20-40-17L 3400kv Brushless Motor (FIN)

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Customer Rated

Dec 07, 2009

Great engine, much power on 6x3 prop. Use it with a 18A hobbyking speedcontroller.



does someone know which size bolts i need to use?

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Customer Rated

Nov 10, 2009

It looks like a cool motor, however, the one that I have get's way to hot!!! I expected it to be red, but it came in blue. It does not spin well at all. I just disconnected from the ESC before it blew and Never used it again. The Turnigy Outrunner motors are significantly better.

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Customer Rated

Oct 11, 2009

Motor ist gut verarbeitet und luft klasse. Habe ihn leider beim ersten Flug innerhalb von 5 Minuten mit einem 4,7x4,7 Prop und 3S Lipo verheizt.Also unbedingt Prop-Gre beachten bzw. vorher messen wieviel A er tatschlich zieht. Auerdem sollte geprft werden ob die Vorderseite fest montiert ist. Evtl abschrauben und mit Loctite sichern.

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Customer Rated

Sep 24, 2009

Draws 18a from a tiny 3s/800mAh pack spinning an apc 4.1x4.1 at 25,500rpm. I had to loctite the front plate to the motor as mine came unscrewed, no other problems. Runs extremely smooth. Needs a bit of airflow to stay cool at this power level.

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Certified Buyer Rated

Jul 15, 2009

i use 3400 and 3600kv for my wing, running a 30C 1000mah battery with a 4" apc propeller, really good

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Customer Rated

Apr 03, 2009

Sehr guter Motor als ersatz fr speed 400. Leider habe ich bertrieben und ihn an 30A Regler angehengt und mit einem Lipo 90Amax brannte er ab, aber mit den orig Nimh akkus ging er perfekt.

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Customer Rated

Mar 16, 2009

Ich bentze diesen im easy glider mit einem original Getriebe fr speed400, Flieger steigt krftig, ausser bei einem sehr starkem Wind (da ist keiner mehr geflogen) trieb der Flieger davon. Ich fand ihn nach 1.5 Monaten im Garten einer 200m entfernten Familie. Regler mit 40A funtioniert einwandfrei, allerdings mit einem niedrigerem hatte ich Aussetzer. Ich wrde ihn wieder kaufen, da er auch nicht bermssig heiss wird.

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Customer Rated

Jan 26, 2009

ich bentze es mit einem easy Glider Getriebe, starten 45 grad zgig nach oben. Ist genau das richtige was man fr easy Glider braucht.

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Customer Rated

Nov 06, 2008

I bought this motor a long time ago and its still going strong. It's being used a lot on my walkera 22e. Initially I tried using the 3s lipo setup but this motor made it way too overpowered so i had to go down to 2s and now it works awesome. It might be a little heavy for micro helis but its still a really good gain in power so I give it 5 stars!!!

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Customer Rated

Nov 02, 2008

I'm not satisfied with this motor at all. I might have got a faulty one but it's not working right.

I hooked it my CC Phoenix 35 controller and the motor ran at very low speed and got quite hot within a minute. I tried various timing advance modes and soft start values without success.

When I rotated the shaft by hand I could feel it was clogging so I took it apart and found some semi-transparent stuff (like epoxy or coil varnish) inside...