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› Revo CP from Hobby-Lobby
02-11-2006 01:29 PM  12 years agoPost 21
sdl3

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Cumming,Ga

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I thought mine was on backwards too but I found if I moved the motor pinion to touch the other side of the tail gear then it spun the correct way. The manual doesn't have a very good picture of this.

Does any of the other models you guys are talking about have a one way bearing for the tail. I've never heard of one but it would help the tail system out on this setup.

I left my tail blades loose hoping it would lessen the wear on the tail gear but it didn't seem to help much.

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02-11-2006 04:26 PM  12 years agoPost 22
ShellDude

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East Coventry, PA

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I don't see how my pinion could reach the upper portion of the gear without having it extend beyond the shaft.

Heat up the pinion and move it a couple millimeters above the shaft, or just reverse the blades? I remember my last gear driven tail was driven from the top portion of the gear.

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02-12-2006 06:33 PM  12 years agoPost 23
rcsoar4fun

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Boise, Idaho

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The pinon gear is very long, if it is even slightly past the shaft on mine it will hit the top of the tail gear. Just heat and move or grind a bit of a chamfer in the top.

Kristopher

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02-12-2006 06:39 PM  12 years agoPost 24
ShellDude

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East Coventry, PA

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a couple folks on rcgroups said it wasn't a big deal to let it be driven from the bottom of the crown gear, assuming one reverses the blades. I've got a few spare crown gears so I'm gonna try it that way... if its strips "too" easily I'll do the pinion adjustment.

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02-13-2006 02:27 AM  12 years agoPost 25
sdl3

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Cumming,Ga

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Yeah, I can't see whay it would make a difference. I lined my pinion up so that I did not have to reverse the tail blades. I do not see any plastic dust around that end of the tail shaft. My problems are at the other end.

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02-13-2006 03:35 AM  12 years agoPost 26
rcsoar4fun

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Boise, Idaho

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Just thought of something... If you change the direction the blades spin you change the way the pitch slider has to move. I wonder if it will have enough pitch to overcome the torque of the motor?

Kristopher

I give up on Loctite, nothing lasts long enough to vibrate loose anymore.

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02-19-2006 09:16 AM  12 years agoPost 27
ShellDude

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East Coventry, PA

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I'm running the tail "backwards" and am not having any problems at all. The pitch range is the same regardless of which way the tail spins.

It's a nice flying helicopter. The extent of adjustments after 4 15 minute hovering sessions is a single turn on one of the main blades pitch linkage for tracking.

Hope to get it outside soon... Its too cold here atm though.

Shell

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02-21-2006 04:05 PM  12 years agoPost 28
TerryE

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Leesburg, VA

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Need servo help
Wondering what servos you guys are using? I would like something cheaper than the HS56 ($25 ea) but am leery about going "off brand".

Any suggestions?

Thanks

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02-21-2006 04:31 PM  12 years agoPost 29
ShellDude

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East Coventry, PA

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I'm using EFlight/Spektrum S75s across all surfaces with no issue. I am noticing a little bit of slop after my 10th or so flight but no where near as bad as what I get from my Hitec HS-55s.

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02-25-2006 04:13 PM  12 years agoPost 30
rcsoar4fun

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Boise, Idaho

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Got a chance to fly the heli last night a little bit. The tail blades were on correctly, the motor pinion must drive the pin from the top of the gear. Otherwise there is just not enough blade pitch in one direction. I am having issues with the gyro, but I believe they stem from this tail pitch issue.

I was actually very surprised just how smooth and powerful this bird is. There was just not a whisper of vibration anywhere. I hate to say this, but so far I like it better than the T-Rex and HB Pro I have flown.

Kristopher

I give up on Loctite, nothing lasts long enough to vibrate loose anymore.

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02-25-2006 05:54 PM  12 years agoPost 31
ShellDude

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East Coventry, PA

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Better than a T-Rex? I wouldn't go that far.

Not sure why you're having tail pitch problems. I'm driving my tail "backwards" and have no pitch issues whatsoever. You may need to reverse your gyro.

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03-16-2006 07:49 AM  12 years agoPost 32
HP03

rrNovice

Arkansas - USA

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Micro Heli Blue gears are awesome!
Have you found a solution to your Revo CP's nylon tail gear problem yet? If not and still haven't tried Micro Heli blue gears you don't know what your missing... My #1 reason for using them is the only stronger solution other than metal gears that have been known to cause radio problems/glitches is a belt conversion(if you can even find one you can use on the Revo CP) which may require modification to your heli's main frame as well as add weight to your heli and belts tend to drag a lot more power from your motor than a light weight(carbon fiber)shaft w/precision bearings(3x8x4mm like the type used in the main blade grips)and conical(beveled)gears. My first crash with this heli was caused by the original nylon gears that stripped in flight several minutes after take off from about 40 feet up and it wasn't pretty. I usually take off and land in grass that caused damage to several sets other sets of stock nylon gears but now with the blue gears all I get is grass stains on the tail blades. I've even had a rock kicked out from the tail fly by my ear(this is a good reason why you shouldn't run your tail rotor in the reversed direction)that broke the ball off of one of the tail blade grips and bent the hardened steel shaft that is included with the blue gears but did not damage any of the blue gears themselves. I replaced all three of the tail gears with Micro Heli blue gears over 7 months ago and still using the same set now - they have so far out lived 4 brass motor pinion gears. They where one of the best upgrades I've ever bought and well worth the money and look great. They even have a tiny set screw to hold them in place and include a tiny allen wrench so you don't have to use glue(you will love this feature if you need to replace the tail boom or worn-out bearings). If you don't have a set yet and plan to get some for your Revo CP be sure to get the standard(Not speed up)gears designed to fit Zoom/Shogun if you have a brushless motor because the extra speed you get from the speed up gear's 14T pinion will require much more precise tail rotor balancing and is really only helpful if you are using a 380/400 brushed motor and/or run a low rotor head speed. I believe that most people that praise the belt conversion and claim it to be the best or only solution have either never tried Micro Heli blue gears or have tried them and didn't setup the proper clearance, or had a worn out motor pinion, or just trying to justify why they spent so much money to purchase and did so much work to install the belt conversion kit.
http://www.microheli.com/mhshop/index.php?cPath=77

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