Need some help...

Dave Deane · 01-12-2009, 12:03 AM

So I ran into this problem yesterday, thankfully I was just hovering nice and low and was able to bring it down.... a bit of a hard landing but still better then what could have happened.

The heli started up fine, after about 2 mins of flying I brought it back close in a hover and I could hear what I would describe as, the motor dying or a winding down kind of noise.

In this case the motor wasnt dying the main blades kept spinning fine, it was the tail blades that seemed to have stopped. The heli started to spin to the left and thats when I was able to land it.

My first thought was one of the gears was stripped or there was something wrong with the belt. Checking it over the gears seem fine, and I tightened the tension on the belt a bit.

I just hovered over some carpet in my garage and the same thing happened after about two minutes. Even right after it happened and I was forced to land it, I was able to take off again and fly fine (hover at least I didnt try anything more).

Gears?...belt?...or something else altogether?

thanks in advance for the help.
Dave

rob_k · 01-12-2009, 11:25 AM

On my heli, the set screw on the pre-built tail hub was not properly seated in the detent on the tail shaft. This is most likely your issue.

Dave Deane · 01-12-2009, 11:34 AM

Thanks!

I will check it out as soon as I get a chance.

Dave

heliaddict22 · 01-12-2009, 10:35 PM

wheres the set screw?

nathanreed · 01-12-2009, 10:51 PM

I too found that the grub screw that locks the tail blades to the tail shaft dent didnt have locktite and came loose very quickerly.

Dave Deane · 01-13-2009, 12:35 PM

Well I tried it out, the set screw was in place with locktite in the dent, I cleaned it up and put it back in.

tried hovering again with and the same problem happened so I guess its something else.

Ill keep toying around with it until I fix er up but any more ideas would be appreciated.

Thanks
Dave

marke · 01-13-2009, 12:44 PM

check your belt pulley to see if there slipping on there shafts

traeside · 01-13-2009, 01:10 PM

Is your battery at full charge? I was seeing a similar problem but it would come with violent jerks from the gyro like the battery was dyeing. Turned out that it was the battery was dead it seems like the heli draws a bunch of power just sitting when doing setup

maxout · 01-13-2009, 01:14 PM

I know you have probably checked, but is your belt broken?

cbrian4 · 01-13-2009, 11:02 PM

Im not sure how the plastic gear is attached to the tail shaft but maybe as it starts to heat up, the gear itself slips on the shaft. Kinda like a slipping pinion.

erniefritz · 01-14-2009, 01:19 AM

Quote:

Originally Posted by cbrian4

Im not sure how the plastic gear is attached to the tail shaft but maybe as it starts to heat up, the gear itself slips on the shaft. Kinda like a slipping pinion.

i agree , you may need to get the metal tail and front pulley for the belt , it is probably the plastic gear turning on the shaft.

01-12-2009, 12:03 AM	#1
Dave Deane Registered Users Join Date: Jul 2008 Location: Bowmanville, Ontario	Need some help... So I ran into this problem yesterday, thankfully I was just hovering nice and low and was able to bring it down.... a bit of a hard landing but still better then what could have happened. The heli started up fine, after about 2 mins of flying I brought it back close in a hover and I could hear what I would describe as, the motor dying or a winding down kind of noise. In this case the motor wasnt dying the main blades kept spinning fine, it was the tail blades that seemed to have stopped. The heli started to spin to the left and thats when I was able to land it. My first thought was one of the gears was stripped or there was something wrong with the belt. Checking it over the gears seem fine, and I tightened the tension on the belt a bit. I just hovered over some carpet in my garage and the same thing happened after about two minutes. Even right after it happened and I was forced to land it, I was able to take off again and fly fine (hover at least I didnt try anything more). Gears?...belt?...or something else altogether? thanks in advance for the help. Dave

01-12-2009, 10:51 PM	#5
nathanreed Registered Users My HF Map location Join Date: Oct 2007	I too found that the grub screw that locks the tail blades to the tail shaft dent didnt have locktite and came loose very quickerly. __________________ Align Trex 450SE V2 - HS-65MG x 3, GY401 - Spekrum DX7 w/ AR7000 Align 500e Scale - Trex 450SE V2 - HS-65MG x 3, GY401 - Spekrum DX7 w/ AR7000 Align Trex 250 - Align DS410 x 3 - Futaba 9257 & GP750 - Spekrum DX7 w/ AR6100

01-13-2009, 01:10 PM	#8
traeside Registered Users Join Date: Mar 2008 Location: Fremont California	Is your battery at full charge? I was seeing a similar problem but it would come with violent jerks from the gyro like the battery was dyeing. Turned out that it was the battery was dead it seems like the heli draws a bunch of power just sitting when doing setup __________________ TRaeside Blade CX2 - T-Rex 250 T-Rex 450 - T-Rex 500 CF HIROBO Shuttle ZX - E-Smart 600 All Metal - Gaui 200- Vision 50 - T-Rex 600ESP

01-13-2009, 01:14 PM	#9
maxout Registered Users Join Date: Dec 2007 Location: Mid Michigan	I know you have probably checked, but is your belt broken? __________________ Frank I held it in just like you said....from what tree? To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Hirobo Shuttle, srb. Trex 450se V2, GY401, S9257, hs-65mg servos, 430XL Motor, 11v 2100mah, 325 cb Futaba 7cap Tx, RealFlight G-4.5, T-rex 500, 6sKP2600,GY401,9257, HC 3D, mCX,(2) HK 450's, telebee gyro, hxt900 cyclic.

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01-12-2009, 11:25 AM	#2
rob_k Registered Users Join Date: Mar 2005 Location: Denver, CO	On my heli, the set screw on the pre-built tail hub was not properly seated in the detent on the tail shaft. This is most likely your issue.

01-12-2009, 11:34 AM	#3
Dave Deane Registered Users Thread Starter Join Date: Jul 2008 Location: Bowmanville, Ontario	Thanks! I will check it out as soon as I get a chance. Dave

01-12-2009, 10:35 PM	#4
heliaddict22 Registered Users Join Date: Jan 2008 Location: Vancouver, BC, Canada	wheres the set screw?

01-13-2009, 12:35 PM	#6
Dave Deane Registered Users Thread Starter Join Date: Jul 2008 Location: Bowmanville, Ontario	Well I tried it out, the set screw was in place with locktite in the dent, I cleaned it up and put it back in. tried hovering again with and the same problem happened so I guess its something else. Ill keep toying around with it until I fix er up but any more ideas would be appreciated. Thanks Dave

01-13-2009, 12:44 PM	#7
marke Registered Users Join Date: May 2006 Location: Hamburg NY USA	check your belt pulley to see if there slipping on there shafts

01-13-2009, 11:02 PM	#10
cbrian4 Registered Users Join Date: Jun 2008	Im not sure how the plastic gear is attached to the tail shaft but maybe as it starts to heat up, the gear itself slips on the shaft. Kinda like a slipping pinion.