Repairing a cx

[easypickingsere]

Recently got a century uk airwolf cx 2.4g for messing in the house. Stupidly tried to fly it in my room (little more than a single beds worth) with the inevitble blade strike on my work bag or my leathers. Top rotor blade snapped, 1 corner off. Ive fitted a new pair to the top, charged up bat tonight went to hover in the lounge to find tho bottom blades spin fine, top didnt want to apart from on low revs, as i increased throttle gently top rotors stopped. I expect Ive buggered gearing for the counter blades, however I have tried without success to find any instruction or exploded diagram anywhere so I can strip, repair/ solve the problem.
Has anyone any clue as what i am to do? I read plenty of you have the blade cx and wonder if anyone has encountered this problem before and knows how to solve it?

[adieuk]

sounds like you might have a bent shaft can you turn it by hand

[easypickingsere]

Yes it turns fine is a little less stiff than the lower blades tho

[Mart61]

If the top blade is less stiff to turn than the bottom blades then I reckon you've either snapped the inner drive shaft or most likely damaged the gear on the bottom.

The fact that it is easier to turn than the one that spins up OK implies that the upper blades, when hand turned, are not turning the motor.

Click here for the Century parts page: http://www.centuryuk.com/Products/He...ma+And+Airwolf

I suspect you may need to buy this: http://www.centuryuk.com/Products/He...Airwolf?pos=16

and/or this: http://www.centuryuk.com/Products/He...Airwolf?pos=17

[Kevlar Carbon]

Had a similar problem with my sons CX2 and found that the Inner Shaft Retaining Collar and screw, just under the Inner Shaft Main Gear was not aligned with the recess in the inner shaft. Basically if memory serves me correctly you need to line up three items, collar, gear and recess. (Need a bright light!)

Click on following link, go to the bottom of the screen to see a link to a PDF exploded diagram of CX2.

http://www.e-fliterc.com/Products/Su...rodID=EFLH1250

Kevlar

[shoot51]

Hi, The top blades are driven by the bottom gear, its worth checking that the motor gear is engaging the drive gear (motor adjusts in by slackening 2 screws) and that the gear has not stripped. Good luck.
Richard

[easypickingsere]

Thanks for the ideas, not had chance to strip it yet tho have checked bottom gear when hand turning and is in constant contact and turning fine, also no teeth on the gear are damaged either. When I manage to get some time will have a go at removing the inners from the shell (fidley job) and check that collar kevlar has mentioned.

Am I to assume the airwolf is very like the blade with its inners/drive system?

[Mart61]

I don't know much about Airwolf but, with co-ax helis, I can't see any other way of driving the rotors other than those employed on the CX2.

[easypickingsere]

Well finally had some spare time this morning so stripped it down. The problem was the motor which drives the top blades is knackered,not sure how its happened as when i crashed shut off throttle just before.Still its a cheap repair n easy.

Thanks alot to all of you with your help!

Just a quick note on the airwolf, in rotor world this month they reviewed it and said its not possible to strip it, I can confirm that you can, just is a little fiddley.

Thanks

[gramey]

The stock motors are cheap enough but pants and get very hot if you run two battery's through them in succession. When one of mine went I changed to the Extreme 180BB motors that have vented cans and they run much cooler than the stock ones and you can replace the brushes on them.