RunRyder RC
 8  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2649 views POST REPLY
HomeAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Other › Hacker A50 12L Turnado bearing failure
10-26-2011 04:00 AM  6 years agoPost 1
Twrecks600

rrKey Veteran

Round Rock, Texas

My Posts: All  Forum  Topic

Toasted another outer bearing on my new Hacker motor (100 flights)!! If any company would like to hire me to test your product, I am available and I promise to put it through it's paces!! LOL!!

I just found out today that the cause of the bearing failure is the helical gear exerting a great amount of force on the pinion which puts excessive force on the bearing. Hopefully a shim will take care of the problem!!

Team me

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 05:01 AM  6 years agoPost 2
helicraze

rrElite Veteran

Victoria - Australia

My Posts: All  Forum  Topic

A shim will not help. Counterbearing will if the force is the right way. Or an engineer who designs it with appropriate bearings would help too!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 11:55 AM  6 years agoPost 3
PJRono

rrKey Veteran

Minnesota, Ya!

My Posts: All  Forum  Topic

With a counter bearing and keeping the gear mesh right, it should hold up. I have the A50-10S and 12S, one had an older design than the other (I think the 12S) that had a large outer bearing to keep the bell straight. You should be happy the newer motors don't have that.

If you skip me I can't play!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 11:57 AM  6 years agoPost 4
PJRono

rrKey Veteran

Minnesota, Ya!

My Posts: All  Forum  Topic

Also the bearings it came with were not rated for the rpm we were spinning them at in our helis.

If you skip me I can't play!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 12:16 PM  6 years agoPost 5
Darren Lee

rrElite Veteran

Woodstock, GA

My Posts: All  Forum  Topic

Was this in a 700E?

I've not heard any reports of a Turnado bearing failure from anyone running them in E6/7s but we have a counterbearing.

Team Synergy / Rail Blades / Morgan Fuel

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 12:17 PM  6 years agoPost 6
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

What size it the motor shaft???

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 12:20 PM  6 years agoPost 7
Darren Lee

rrElite Veteran

Woodstock, GA

My Posts: All  Forum  Topic

6mm

Team Synergy / Rail Blades / Morgan Fuel

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 12:25 PM  6 years agoPost 8
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

That sounds to me like too much heat. A 6mm shaft does not flex like a 5mm one does. I have never burned bearings in a motor with a 6mm shaft. I also have never used a CB in many 700 class helis, Trex 700E being one. No CB on my TDR right now and no issues to speak of. You gotta cool that motor down or you will still have issues with bearings prematurely failing, even with a CB.........Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 01:16 PM  6 years agoPost 9
Twrecks600

rrKey Veteran

Round Rock, Texas

My Posts: All  Forum  Topic

It is a Trex 700E and it has the pinion bearing block. I toasted the bearings twice in the Align 700mx (stock motor). How would I reduce the heat? The motor comes down around 150 to 175 degrees in Texas so I thought that was good. Am I running it too hot?

Team me

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 01:26 PM  6 years agoPost 10
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

A hole in the nose of the canopy will help a lot. The operating temps all depend on the motor and bearings used. Some "can" run hotter, but heat is always the enemy especially on a high powered setup.
I would pop a small hole in the canopy, adjust the gear mesh so there is no lash but not too tight, and oil the bearings with silicone oil every 5 flights or so (if easily done).

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 02:13 PM  6 years agoPost 11
Eury

rrProfessor

Dover NH

My Posts: All  Forum  Topic

Drop down a tooth on your pinion. Less stress, less heat, longer flights.

Nick Crego

Citizen #0168

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 02:38 PM  6 years agoPost 12
gwright

rrVeteran

Champaign Il

My Posts: All  Forum  Topic

Have the 400 KV turnados in two Raptor G4's and the 580 KV in the Titan X50. No bearing issues, hundreds of flights now. In the summer with ambient temps here in the high 90's/low 100's I was seeing 130~135 on the motor. Last weekend when it was cool at the Jacksonville event(50's/60's) I was seeing motor temps from 96 to 108 at end of flights. Since you have experienced the same thing with different motors and your temps are higher,.. I'd agree with the others,..overgeared and need to reduce pinion to reduce load. This would probably happen with every motor you try and isn't necessarily a "motor issue". Also,.. I've never needed to oil a hacker bearing.

Gary Wright

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 11:09 PM  6 years agoPost 13
Twrecks600

rrKey Veteran

Round Rock, Texas

My Posts: All  Forum  Topic

If I drop down a pinion size, I won't be able to 3D for squat!! LOL!! I am running the 12 tooth pinion with the 112 tooth helical gear. I wonder if the motor was getting hot due to the bearing rubbing on the shaft.

Team me

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 11:29 PM  6 years agoPost 14
Eury

rrProfessor

Dover NH

My Posts: All  Forum  Topic

Then learn some collective management. Those temperatures are your equipment telling you that you have it set up with the wrong gear ratio. If you don't have the skill to fly it with a different ratio, then change to a different motor with the proper kv to allow you to gear it right.

Nick Crego

Citizen #0168

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2011 11:54 PM  6 years agoPost 15
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

What HS you trying to run???

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2011 12:24 AM  6 years agoPost 16
Twrecks600

rrKey Veteran

Round Rock, Texas

My Posts: All  Forum  Topic

@ Eury -I don't think I have any collective management issues!! I've only been flying for a little over 3 years so maybe my CM isn't perfect, but it's definitely not horrible!! The setup that I have is the one recommended for the Trex 700E flying the 470 KV motor.

http://www.youtube.com/user/TheEvil...u/5/KZrWmdW-pG4

@ laughingstill - My current head speed is 1850 in mormal, 1950 in idle 1, and 2150 in idle 2. I usually fly in idle 1 unless I really want to smack it down, then idle 2 does the job.

Team me

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2011 12:35 AM  6 years agoPost 17
Eury

rrProfessor

Dover NH

My Posts: All  Forum  Topic

Like I said, if you cant do 3d on your heli with a lower headspeed, then you don't have the collective management skills to do it. I feel like the old man here, if you'd been around helis for long enough you wouldn't know the damn near unlimited power that we see on these big electrics. You would have learned on nitros, especially on 30s and 60s where you had to be mindful of your inputs.

Would you really say that some of the really good pilots couldn't 3d your heli with 1 less tooth on the pinion? Hell, there is a video somewhere out there of Kyle Stacy flying a stock Blade CP better than most of us could fly anything. If others could fly your heli with an 11T and you can't, then you need to work on your collective management.

Your heli is telling you that it isn't setup right. If you want it to work right, then change the setup. Pinion or motor, one of them will solve your problem.

BTW - I clicked on your homepage link. Those are some great pictures.

Nick Crego

Citizen #0168

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2011 01:09 AM  6 years agoPost 18
Band1086

rrElite Veteran

Kennewick, Wa. USA

My Posts: All  Forum  Topic

I believe that gear ratio is ok for the HS you want to run, but how much back lash are you running? Also, what ESC?

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2011 01:33 AM  6 years agoPost 19
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

Castle ESC right.....

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-27-2011 01:39 AM  6 years agoPost 20
Twrecks600

rrKey Veteran

Round Rock, Texas

My Posts: All  Forum  Topic

Very little "slop" in the gear mesh but there is a little and yes, it is a Castle 110HV (non ice)

Team me

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 2649 views POST REPLY
HomeAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Other › Hacker A50 12L Turnado bearing failure
 Print TOPIC  Make Suggestion 

 8  Topic Subscribe

Thursday, June 21 - 9:42 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online