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Main Blades turning fine but copter won't lift
Tags: Syma X9
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Williamdog
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Guests
February 5, 2012 - 3:46 am

I have just acquired a Micron Helicopter which looks very similar to the S107. However, the blades are spinning but the copter will not lift up. The whole thing just spins around clockwise. I have tried charging and recharging the battery as I assumed the battery maybe wasn't sufficiently strong enough but still won't lift. I have adjusted the L/R knob on the transmitter to stop the spinning but soesn't make any difference. Can anyone help please? John

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CPD
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Guests
February 5, 2012 - 4:44 am

Hmmm...

 

Can you feel any air moving? Maybe the battery's no good, or something. That's usually the case, but if it's brand new, then it might either be a lemon, like the dancer 026, or it's some other random issue.

 

I'm inclined to say that it's a bad battery, though.

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Williamdog
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Guests
February 5, 2012 - 9:50 pm

CPD said:

Hmmm...

 

Can you feel any air moving? Maybe the battery's no good, or something. That's usually the case, but if it's brand new, then it might either be a lemon, like the dancer 026, or it's some other random issue.

 

I'm inclined to say that it's a bad battery, though.

Yes, there is air below the blades. The copter seems to lift about a millimetre but spins around clockwise slowly. I was also wondering about the battery, if there is not enough power to turn blades fast enough, although they seem to be.

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CPD
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Guests
February 6, 2012 - 1:41 am

ccw spin... hmmm... right spinning motor's not going fast enough for one thing...

 

Are the 107 blades larger than or have a greater pitch than the ones this thing has? If the blades don't move as much air, I'd swap them out and try it for a flight, but I'll have to call it a battery...

 

I think the heli's not spinning the blades fast enough to get the trim to work properly, causeing the rotation, and that usually comes from a bad battery.

 

I would usually say it's a bad battery, but I might say this needs one more look over from SN and/or SF...

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CPD
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Guests
February 6, 2012 - 2:00 am

Ok, I think I might have found your heli.

 

http://www.minihelicopter.co.u.....icron.html

 

If that's the right one, it's a version (rabranded or copied) of the s110g micro heli. (about half the size of the 107)

http://www.symatoys.com/produc.....tml (this is an updated version with new remote and styling)

 

If it is, it has a 3.7v 70mah lipo battery, and that would be easilly replacable with a comperable 70 mah battery, or a 150 mah s107g battery, if it'll fit somewhere and you want longer flights. (but, with the smaller size, it probably won't)

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Williamdog
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Guests
February 6, 2012 - 6:36 am

Yes, the first link is the correct one = Micron. It's only 12cm in length whereas the Syma 107 is 22cm. I think you're right, the battery is probably at fault as the blades don't increase in speed when you move the throttle forward therefore not creating sufficient down-draught.  Also, the rear tail rotor only occassionally turns. I will try and find another battery, although the majority of the ones I've seen on ebay etc. look too big and seem to be for the Syma and similar sizes.  Thanks for your help. JohnSmile

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donw
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Guests
February 7, 2012 - 12:25 pm

try a new battery.

i have a similar problem with my 033G and discovered a stripped gear for the top rotor. the rotor would spin but not generate enough lift…Cry

IIRC, should the tail rotor should spin only when you give it throttle for forward/rearward movement...(????) ConfusedConfusedConfused

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CPD
Guest
Guests
February 7, 2012 - 1:46 pm

yes, the tail rotor ONLY spins when either A you give it foreward/backward throttle, B it gets hit, and C it get blown on.

 

Otherwise, you have a short.

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