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Please help, a new problem recently.

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Old 02-19-2008 | 08:30 PM
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Default Please help, a new problem recently.

I hope you could help me again, I've got another Belt-Cp issue.
Recently, i just noticed that my main rotor aren't in balance. Instead of one straight line view from one side. it is tilt down from the mddle. When I spin it up in normal gyro mode it spins violently and out of control. When I use reverse mdoe it is usable. It still has a lot of vibration. When it's on concrete ground, it violates so badly, the tail wing knocks the ground couple times and main rotor changed its spots. I think there's some kind of pitch or main shaft problem. I'll appreciate any help. If you need more information, I'm updating some sample videos on youtube soon.
Old 02-19-2008 | 08:35 PM
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Default RE: Please help, a new problem recently.

Homeunt,

If you've had a crash and by your discription, I believe you may have bent the spindle/feathering shaft in the rotor head.

Dave / Choppersrule
================================================== ==================================
ORIGINAL: homeunt

I hope you could help me again, I've got another Belt-Cp issue.
Recently, i just noticed that my main rotor aren't in balance. Instead of one straight line view from one side. it is tilt down from the mddle. When I spin it up in normal gyro mode it spins violently and out of control. When I use reverse mdoe it is usable. It still has a lot of vibration. When it's on concrete ground, it violates so badly, the tail wing knocks the ground couple times and main rotor changed its spots. I think there's some kind of pitch or main shaft problem. I'll appreciate any help. If you need more information, I'm updating some sample videos on youtube soon.
Old 02-19-2008 | 08:45 PM
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Default RE: Please help, a new problem recently.

I've uploaded the pictures, please tell me if there's anythign wrong. The bent spindle/feathering shaft is possible but I don't think it could be. The crash I meant the helicopter spun out of control when throttle turned all the way down and it hit a side of the room.
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Old 02-19-2008 | 09:08 PM
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Default RE: Please help, a new problem recently.

I just added two videos on youtube
First one is Belt-CP attempt to demonstrate vibration and the crappy camera didn't show it. It still got a good shot of the pitch problem.
http://www.youtube.com/watch?v=esMImcZkTLc

Second video is the demonstration of vibration and that is on carpet, On concret, it is about 3 times worse and when i spin down it literally bends main rotors from its place and knocks the tail couple times on the ground.

http://www.youtube.com/watch?v=H0ov9NrRnWA
Old 02-19-2008 | 09:23 PM
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Default RE: Please help, a new problem recently.

Homeunt,

Watched both of the videos... The sound of the heli, doesn't seem right. Way to loud and inconsistent. With knocking sounds too. Check your gear mesh, but I'm thinking more toward a main gear that has broken or worn teeth or even the pinion gear on the motor. Check them closely. Watch your second video and listen to the slamming.

Dave / Choppersrule
================================================== ====================================
ORIGINAL: homeunt

I just added two videos on youtube
First one is Belt-CP attempt to demonstrate vibration and the crappy camera didn't show it. It still got a good shot of the pitch problem.
http://www.youtube.com/watch?v=esMImcZkTLc

Second video is the demonstration of vibration and that is on carpet, On concret, it is about 3 times worse and when i spin down it literally bends main rotors from its place and knocks the tail couple times on the ground.

http://www.youtube.com/watch?v=H0ov9NrRnWA
Old 02-19-2008 | 09:49 PM
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Default RE: Please help, a new problem recently.

the main gear is slightly damaged from my familization with the transmitter. I accidentally pressed IDEl button and the throttle turned maximum. The strange part is that it was fine after that. Now there is a bit of problem. So could you tell me if there is anything wrong other than the main gear?
If I were to replace the main gear I would need help to replace it. Right now, I see about 2 to 4 teeth completely broken off and a little bit left for 3 to 6 teeth. Rest are fine. Is there non-plastic main gear? I am going to buy the spare part before summer and willing to get it flying just fine till April.
There are more videos of the problem but it's not yet being uploaded to youtube. [It's been 3 hours]

I thank you for your prior advices and I appreciate your time and effort to help me better. If you could inspect the videos carefully and tell me what's wrong I'll find that very helpful.
Old 02-19-2008 | 10:14 PM
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Default RE: Please help, a new problem recently.


ORIGINAL: homeunt

the main gear is slightly damaged from my familization with the transmitter. I accidentally pressed IDEl button and the throttle turned maximum. The strange part is that it was fine after that. Now there is a bit of problem. So could you tell me if there is anything wrong other than the main gear?
If I were to replace the main gear I would need help to replace it. Right now, I see about 2 to 4 teeth completely broken off and a little bit left for 3 to 6 teeth. Rest are fine. Is there non-plastic main gear? I am going to buy the spare part before summer and willing to get it flying just fine till April.
There are more videos of the problem but it's not yet being uploaded to youtube. [It's been 3 hours]

I thank you for your prior advices and I appreciate your time and effort to help me better. If you could inspect the videos carefully and tell me what's wrong I'll find that very helpful.
the fact that you're missing 2 to 4 teeth and parts of another 6 IS THE PROBLEM.


lol, you cannot fly a heli with broken teeth on the gear... none, zero, nada... this is completely baffling to me that you would even consider it and that you're wondering what your problem with the heli is...

change the gear or you're going to have another crash which will break even more parts.

is it just me or is this not obvious??

the reason the gear is plastic is because it's a cheap part, try to imagine what would happen if you had a steel gear and hit the idle up??? you would trash your motor which costs 5 times more than the gear, or you would have broken some part of the head or even if it all held together you would have had instant 3000 rpm and probably destroyed the heli from that.
Old 02-19-2008 | 10:22 PM
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Default RE: Please help, a new problem recently.

Homeunt,

I kinda thought the main gear was damaged by the sound. With 2 to 4 teeth completely broken off, it's time to replace the gear. It'll never be right with out a new gear. The rest may be fine, but it's the broken ones and worn ones causing your problem.
I'm not aware of a non-plastic gear, and it won't be a good idea to get something stronger. Other things would break. I'm not sure they make them for the Belt-CP.. I've got a Belt-CP, and did the same thing, hit idle-up and tore the gear apart.

See pictures of the gear and what the heli looks like to get it out. Need to remove the the rotor head assembly and main shaft.
If you need help, let me know and PM me. I don't always check all the threads.. Oh, you'll need a bearing removal tool also, about 5 bucks.

Dave / Choppersrule
================================================== ===================================
ORIGINAL: homeunt

the main gear is slightly damaged from my familization with the transmitter. I accidentally pressed IDEl button and the throttle turned maximum. The strange part is that it was fine after that. Now there is a bit of problem. So could you tell me if there is anything wrong other than the main gear?
If I were to replace the main gear I would need help to replace it. Right now, I see about 2 to 4 teeth completely broken off and a little bit left for 3 to 6 teeth. Rest are fine. Is there non-plastic main gear? I am going to buy the spare part before summer and willing to get it flying just fine till April.
There are more videos of the problem but it's not yet being uploaded to youtube. [It's been 3 hours]

I thank you for your prior advices and I appreciate your time and effort to help me better. If you could inspect the videos carefully and tell me what's wrong I'll find that very helpful.
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Old 02-19-2008 | 10:33 PM
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Default RE: Please help, a new problem recently.

thanks for your help. I heard from a local R/C store person that it'll be 'okay' with couple msising teeth on my heli. I guess he didn't know what he was talking about. This may affect my investment in HBK 2- may be cancelled and used for repair/upgrading Belt-CP. Choppersrule, thats exactly what my gears look like. I guess I'll spend another 20's and 30's into my first heli :'( . [Say I can learn from experience.]
Old 02-21-2008 | 11:56 AM
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Default RE: Please help, a new problem recently.

is this overcharging battery? I used ESKY 11.1v battery charger for 11.1 1800maH 20 c lipo "mystery" battery. Usually with Esky battery it took around 2 to 3 hours to charge fully and mystery battery's been charged for over 7 hours and it runs for well over 20 minutes? I'm a little bit afraid of what's going to happen if I overcharge it and I read some threads saying "never charge the lipos for over 2 hours". I also bought a charger with balancer and repair function and its on its way to me. Shall I keep using esky charger for normal use or should I just wait and don't bother till the other charger arrives?

BTW I am getting a HBK 2 and am willing to know which parts to upgrade [other than Motor and ESC since I'm already aware of it.] for the better performance and more safety.
Old 02-21-2008 | 12:51 PM
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Default RE: Please help, a new problem recently.

the battery should reach a max charge of 12.4v, if you can check that with a volt or multi meter.

the best upgrade after the motor/esc is the 43t tail upgrade, gives you more tail authority and prevents the belt slipping off the roller guide. After that I'd say a hh gyro.
Old 02-21-2008 | 05:49 PM
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Default RE: Please help, a new problem recently.

:}:} the missing teeth is your main problem... your best off not even spinning the heli up with that gear like it is.. also on your first pic you posted it sure does look like to me that the main shaft is bent. anyone else see that??? check your spindle shaft too.. put a hand on each of the blade grips and see how much play you have when you wiggle it up and down.. it is really hard to eye a bent shaft.. even a shaft that has a hair line bend in it will cause problems.. since you have to change the gear you should change the main shaft while you are at it. then you will know for sure if it is bent.

if it isnt bent,,[which it looks like to me] then you will have a spare which you will most likely need one day anyway.. jake.
Old 02-21-2008 | 07:35 PM
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Default RE: Please help, a new problem recently.

I can tell there's something wron by the look of the main rotors. The problem is that I don't know what is wrong with it. I will be replacing main shaft and I would like to know what spindle shaft is. Then if anyone could point me where all the replacement/repairing instructions are, I'll highly appreciate it. If not, could someone please PM me the instructions?
I'll also find the following helpful:

1. What else to buy along with main shaft and main gear (and bearing removal tool)?
2. How can I inspect if the shaft is bent or etc. I can't physically see anything wrong with the heli yet.

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