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Goblin 570 › Cut the motor shaft or not?
04-20-2018 10:11 PM  59 days agoPost 1
HawkNoob

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Pa

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Hi, I am setting up a Goblin 570 and using a Scorpion HK4025-1100. In the manual it says to cut the motor shaft down to 28mm for battery clearance. The shaft is obviously longer but seems to me there would be enough clearance for battery? Cut it or not? Have not cut the shaft before, don't know if I will screw it up. Thanks.

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04-20-2018 10:29 PM  59 days agoPost 2
DemetriusUSN

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Virginia Beach, Va USA

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You need to install it and see if the battery will fit under it with some clearance. I’ve had some helis with the shafts uncut and some with shafts cut, so test fit to see how much room you have between the shaft and pack. Hope this helps...

Minicopter Diabolo 800, Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter 550,Compass 6hvu, Devil 380

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04-20-2018 10:40 PM  59 days agoPost 3
wjvail

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Meridian, Mississippi

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I can't tell you what you should do. I don't own either that helicopter or motor. But if you are uneasy with modifying your motor, maybe keeping a spare uncut shaft handy would help. I understand your reluctance to make the shaft shorter but if you bunkered an unmodified shaft it'd be easier to bust out the Dremel and start whittling away.

Shafts aren't that expensive and easy to change.

I don't know if you have a 5mm or 6mm shaft.
http://grandrc.com/Electric-Motors-...6274989cfe73c4b

"Well, Nothing bad can happen now."

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04-20-2018 11:52 PM  59 days agoPost 4
HawkNoob

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Thanks for the replies. I checked the clearance between the shaft and batteries and it would have fit but... Pretty close and I don't need a motor shaft drilling a hole in a Lipo pack and starting a fire if the battery shifts in flight. Since I had to make a flat spot on the shaft anyways (factory flat spot was in the wrong place for my needs), I wrapped the motor in a zip-lock bag, got out the dremel with a heavy duty cutoff wheel and cut that extra shaft length right off. Piece of cake. Now I can rest easy and continue the build.

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Goblin 570 › Cut the motor shaft or not?
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