RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 784 ONLINE 79 EVENTS SEARCH REGISTER  START HERE
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]687 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . Futaba-RC

.
.
e-Electric General Discussion > eRaptor 90 Main Gear Wear
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		I’ve been getting some gear wear on my eRaptor 90. A quick-fix on the V1 may have left the motor and main shaft unparallel, causing the pinion to take little shavings of plastic out the main gear.

The V2 even snapped a 5mm motor shaft and threw the pinion out the side of the helicopter!

The V2 or “EMax" doesn’t need any fixes (that could make the gears slightly off) although the XeroG 600EP and all nitro Raptors have bearings above and below the pinion and with dust still coming off the main gear a long motor shaft with an extra support bearing for the pinion is looking essential for the EMax.

I’ve tried running the mesh as normal, loose and as close as can be without being tight but still have some dust coming off the main gear. The driven sides of the teeth are being worn down slightly.

I was wondering if everyone gets this on their electric Raptor conversions or if there might be a problem.

I’m hoping a longer motor shaft and an extra support bearing for the pinion will cure it. My XeroG which had the same gears didn’t have this problem but then it was a smaller helicopter. Nitro Raptors don’t have this gear wear. Or could that be because the oil from the Nitro is keeping the gear greased?



DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-05-2009 05:21 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		Actually it's pretty normal. A small nick in the pinion will cause dust. Also each pinion is just a little different which can cause wear dust. I would definately use a bearing above the pinion as these motors really have some torque and will push the pinion away from the maingear. I would continue to run the mesh pretty tight (not much backlash) or you'll be watching gear teeth disappear!

"There is no replacement for displacement!"
05-06-2009 02:34 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Busher
Key Veteran
Location: Manchester, England

My Posts This: Topic  Forum		I have had wear on my nitro raptors in a similar way. It happened on a few occasions, no detriment to the final working of the gear. As said previously each gear is slightly different so high spots etc are worn down producing dust.
I was also going to suggest that the torque from the larger electric motors are more aggressive at wearing the gear down on the driving side but that has been mentioned in the above post. Looking at your cad solution though, you have appeared to solved the problem. I would definitely go ahead and support the shaft with additional bearings. I believe in its current state with that power you will find that the shaft is flexing as it drives the pinion at high loads, this may also lead to the shaft giving way due to the additional stress of the flexing.

Good luck with the mod, and by the way if you have designed that conversion and manufactured the parts, you have my respect

Good luck
Busher
05-07-2009 09:37 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
MrMel
rrProfessor
Location: Lidingo, Sweden (GMT+1)

My Posts This: Topic  Forum		Nice conversion!

Even if things are "mod 1.0" there is quite alot tolerance between those, a pinion made for one gear might not fit "at all" until run in properly (for sample Hirobo/Scorpion pinions are a little odd in tooth size)

My site: http://heli.dacsa.net
05-07-2009 09:53 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		Those frames sure are quite a bit different than the first set. I like these better. I wouldn't use the battery cage though.

"There is no replacement for displacement!"
05-07-2009 11:53 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		Thanks JPRono, Busher & MrMel. Yes these frames are very different from the V1 and they are very practical. No overlapping wires, no awkward building and I didn’t even have to use any extension leads.

So the gear wear’s normal?

It’s very interesting that you say the scorpion and Hirobo pinions are funny sizes!
(I drew a scorpion pinion and was wondering wtf was going on)!

It’s getting a Century pinion next with a long motor shaft and support bearing. I will know how it’s going once it’s all fitted and done a few flights. I’ll keep you posted.
This heli climbs out of sight doing tictocs if you’re not gentle on the collective but the V1 chucked out loads of dust in just a few flights. I’m optimistic about this V2 with the stiffer frame and support bearing.

What do you mean you wouldn’t use my carefully design battery holder?! That’s the best bit! Really though I wouldn’t stack 12 cells (at 45mm width on a 34mm wide tray) and expect them to stay on there with velcro straps alone. I’d expect the straps to cut into the pack.

There’d be nothing stopping you however from building the frame without the battery holder, saving four pieces of carbon. All the carbon in the frame only weighs about 180g with the battery holder.

So why wouldn’t you use the battery holder?

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-08-2009 02:39 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		I've been using 10-11s with velcro and straps without any problems. They look a little bulky?

"There is no replacement for displacement!"
05-08-2009 05:22 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
HeliCSR
Senior Heliman
Location: Hesperia, Ca, US

My Posts This: Topic  Forum		If you buy a can of PURE silicon lube, this stuff is dry after application and no dirt will stick to it.

Its clear and if you touch the gear with your finger it will be clean but will feel slick.

Spray some in a paint cap, dip a piece of .0625 cardboard, like the backing most our heli parts come in.

Wipe between each gear tooth, dipping after 3-5 teeth.

Watch how long your gear last now without wearing down, and there's nothing to throw off, you cant even see it, gear looks dry and clean.

After a few flights lube it again, then that should be good for a while.

What I did is I did 4 flights without any lube, to break the gear in with the new pinion, then I lubed.

I fly and then I fly some more.
If it don't glitch then I won't crash.
05-09-2009 01:26 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE  
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		The battery support is very light and allows the battery to easily be connected while being held firmly. Unlike the V1 and my old XeroG I can also get to the velcro without having to go inside the frames.

I really thrash the heli around and wouldn't rely on straps alone.

"Bulky's" a funny word to use because they're the shape they are to keep the battery locked to the frame without it rocking around. It fits inside a standard Raptor 50 canopy.

Anyway the comment on using silicone lube is interesting. I've used that stuff before but didn't think about putting any on the main gear. I'll give it a go!

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-09-2009 12:01 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		Nothing meant by it, it just looks bulky compared to the rest of the heli. Probably because you've done such a good job making it compact. If it fits in a 50 canopy, then I guess it isn't!

"There is no replacement for displacement!"
05-09-2009 03:38 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		It is a lot wider then the frame because the frame's only 36mm wide!
The battery holder's about 85mm wide and yes, it snugly fits inside an R50 canopy - I think the R90 canopy's far too tall and bulky

I've done another 4 flights on it and after spraying some WD40 (Z50 in other parts of the world) I can't notice any more wear on the gear.
I started pushing the heli into 4-point piro tictocs expecting the gear to fail and it didn't.

The previous wear is from the top of the teeth to about half way down the face of the gear teeth; the bottom half of the teeth face isn't wearing. (The motor is ABOVE the main gear) I'm imagining this is because the main gear is deflecting the pinion, but if that was the case I would have imagined that the wear pattern would be the opposite to what I've described.

It might also be because the teeth on the pinion are not completely uniform?

Hopefully, a new motor shaft and support bearing will solve it. I'll get some pics and vids up soon.

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-11-2009 03:14 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		The pinion is being pushed away, so the top of the pinion dosen't contact the bottom of the main gear. This also increases the wear on the top of the main gear because it's taking all the load.

"There is no replacement for displacement!"
05-11-2009 08:31 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		I've just gone to the Scorpion 4035-400 motor with eight magnets.
(It's very "clonky" and setting the mesh takes extra care).

I've been running it with a stock 6mm shaft and 11T pinion without any extra bearings.

The gear wear seems to have stopped.

The governor doesn't feel as consistent even though I've increased the throttle from 60 to 70%. 80% feels about right although I won't know the headspeed until Sunday.

I’m easily getting an extra minute of flight time and that’s without being careful on the collective!

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-18-2009 10:45 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		I thought the Scorpions were all 10 pole motors?

"There is no replacement for displacement!"
05-18-2009 02:16 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		This one's got 12 stator booths and 8 magnets.



DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-19-2009 12:01 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		That's my bad, I never looked at the stats for their other motors.

"There is no replacement for displacement!"
05-19-2009 02:48 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		I've been flying on an 11T pinion and it's quieter and doesn't seem to wear the main gear compared to the 10T!

There's some info in here for those interested:

http://www.runryder.com/helicopter/...ipt=eRaptor90V2

Head-speed's a little low on 10T, maxing-out at 1870 in the hover and the heli also starts an aileron wobble before the Jive spool-down cuts-in.

Alpha Frame (Can be used with a stock motor shaft or with an extra bearing)


Beta Frame (Higher CG and the pinion support bearing is essential)


DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-26-2009 03:29 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		Way cool Cam! I figured you'd need the 11T running the Jazz. It doesn't run the motor up as high as a Castle, but that's a good thing as the larger pinion will mesh more with less chance of stripping out the main gear.

"There is no replacement for displacement!"
05-26-2009 06:13 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
"Cam"
Key Veteran
Location: UK

My Posts This: Topic  Forum		It's the JIVE. I found with the 10T pinion that there wasn't any noticeable difference in RPM between 90 and 95% throttle. The head speed with the 11T was about right at only 75% throttle but I'm wondering if the RPM will increase at all if I raise the throttle %. Should find out tomorrow.

I thought the Castle ESC's just blow up?

DSX9
EMax V2
http://runryder.com/helicopter/gallery/37491/
05-30-2009 10:31 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
PJRono
Key Veteran
Location: Land of 10,000+ Mosquitos!

My Posts This: Topic  Forum		Evidently I got the only two good ones! Jives and Jazz have the same governor programming. You want to run them at about 75%, it leaves headroom for the governor.

"There is no replacement for displacement!"
05-30-2009 10:52 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
2 pages [ <<    <    ( 1 )     2     NEXT    >> ]687 viewsPOST REPLY
Boca Bearings . XHELI.COM . Advantage Hobby

.
.
e-Electric General Discussion > eRaptor 90 Main Gear Wear
 Print TOPIC Advertisers 

Subscribe to This Topic

Sunday, March 21 - 3:43 pm - Copyright © 2000 - 2010 runryder.com | email | link to rr | START HERE | NF