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Scorpion Power AlignRC
flyboy1985

Senior Heliman

mohnton pa

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@ rappy

yea I agree,, but first I will try to find a shaft made by scorp , or someone else that will be a drop in fit,

going pro , one crash at a time

09-29-2016 07:28 PM
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helifanatix

Veteran

Fountain Valley, CA

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A save is not having to fix anything in my opinion.

I see a lot of "I think" ... "I suppose" ... Coming from your many many many many many post.

I know what your issue is but hard to give advice when they overriden so often. You don't know what the problem is but you definitely know what answer you don't like. Be open to your approach to fixing the problem.

when i see an individual showing more resistance than my 900 flight pulse 6S 5000 45C puffed pack, I hope time will be kind to them due to their mindset.

- Scott

09-30-2016 12:03 AM
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icanfly

Elite Veteran

ontario

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hfan, don't put too much emphasis on flyboy as he in this case is only making light of something. He's been given enough info to satisfy the answer technically and has the resources to do something about it. Personally it comes at a good time for someone like me who is about to take on the challenge of motor engineering. Looks like other companies have a motor engineer who understands the output forces and designed an appropriate shaft that won't fail like the align did. everyone knows the Align is consumer product as opposed to carefully crafted and engineered boutique level rc, flyboy knows what he's doing and seems to have taken everything in stride very well. His rough landing is a save, from utter destruction the heli was considerably close to given it's position in the air att the motor shaft failed, emergency auto. Do you think he doesn't have nitro experience, lol.

One little engineering oversight and game over on that product line, except is wasn't just one item on the heli, and you understand it is a toy right? play on.

Look at the "views" numbers foremost not the amount of replies.

09-30-2016 12:32 AM
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ant_mb

Elite Veteran

Delran NJ

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Is there anyone left on the sight that speaks English?

Thanks
Anthony

09-30-2016 01:29 AM
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flyboy1985

Senior Heliman

mohnton pa

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I dunno why you guys think I am not taking your advice , just think there may be more to it,

for example guys ,
why after the shaft snapped was my pinion bearing still ok?
you would think a shaft that isn't straight would eat that bearing alive and than fail?

I dunno,, just trying to see all the roads here before we say "wrong setup ," or not straight shaft to gear?

ive never had this happen on my tsa ,?

so I don't know,
maybe it was fatigue , maybe a defect , heres the thing ,
unless someone wants to pay to have a lab look at it,, we will never know,,

I say ""I think"" or ""I soppose"" because I'm not sure and maybe I could be wrong?
didn't know I wasn't allowed to say them words to express in a sentence the doubt of what happened and or a fix ?

nothing more , nothing less, you guys

going pro , one crash at a time

09-30-2016 02:09 AM
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heli4fun

New Heliman

Northern,Ca USA

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750 MX motor shaft snapped

Hi,

I am new here and read this topic to be of interest since i recently experienced the same ordeal with my 750MX motor,it basically snapped right where the motor shaft exits out of the motor.I fly moderate 3D with a Vbar Neo using the Vbar governor,Castle Creations 160 ESC running 2100 headspeed
13 degrees pitch.
The incident happened 15 seconds at the start of my flight,luckily i was able to auto down with no damage.I've had at least 150 flights on this bird with no issues and "Suddenly"!!!! WTF????
So,i will attest to what the OP posted since I too have had the same experience...
Will post pics as soon as I figure out how to post pics (being a new member).
I hope this helps this particular topic in terms of exposing this problem.

10-01-2016 03:00 AM
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icanfly

Elite Veteran

ontario

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Is there anyone left on the sight that speaks English?
I like that, if anyone understood how the fact of the matter was pointed out clearly with anecdotes thrown in for the stretch, I gave you guys the facts of what how and where, you supplied when and who and now it's up to everyone to do something about it.

I've had a fair understanding of metals and engineering for a considerable amount of time as I have experience since 13 years old in welding, you learn a lot by being around metals, bicycles , motor bikes, buildings, aircraft, auto mobiles of the race and custom sort. So I KNOW why and shared my knowledge, anyone want to contest it, it's not debatable any longer whether you accept the truth or not DO something about it now and don't buy an Align shaft to replace the severed one any longer.

The pinion would have been held in place by the lower bearing and stopped along with the main gear like throttle hold was engaged while the motor would still spin unimpeded until you stopped it, it can't go anywhere and the bearing will hold the pinion and remaining shaft into the bottom bearing on axis and not disintegrate.

and its "SITE" not "sight".

go play

10-01-2016 03:11 AM
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ant_mb

Elite Veteran

Delran NJ

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,,,

Thanks
Anthony

10-01-2016 03:19 AM
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#55

Veteran

Chico, CA

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and its "SITE" not "sight".
Ha! Insta Karma.

To the O.P. sorry your motor shaft sheared, good save though.

Check!

10-01-2016 07:38 AM
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icanfly

Elite Veteran

ontario

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thupid? Engrish?

10-01-2016 01:32 PM
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flyboy1985

Senior Heliman

mohnton pa

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yea I googled align motor shaft failures .. and got some good reads,,

I think maybe a defect for sure, or maybe without the adjustable motor \pinion mount , you risk not being %100 true to alignment?

and thus risking a shaft failure , ?

maybe some shafts are carbonized better than others?
or maybe the oil bath never gets changed and thus after so long , the oil breaks down and losses the visc. and thus not giving a proper hardening?

just somethings to ponder

going pro , one crash at a time

10-01-2016 03:12 PM
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icanfly

Elite Veteran

ontario

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that last point is a particularly different approach, interesting point to consider being the quenching process.

Man, the way atoms and molecules in metal act on a sub atomic level toward arranging, alloying, and hardening is quite something to think about and read.

My own hobby heli potential includes a 700e, probably upsized to an 800 since it's enough to impress without becoming harder to teleport. There's a kde motor on it but another 700 is a dfc with the 700mx motor, I'll be looking at a few of the 700's failure points and seeking upgrades meeself.

10-02-2016 12:33 AM
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flyboy1985

Senior Heliman

mohnton pa

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got the 750mx shaft today ,

drop in fit like I said,,
so much so , I aint gonna bother pulling the motor for a pic,

on a side note , looking at my old shaft and than looking at the new one when it came,
I really want to say this new shaft seems harder , and better milled, I cant explain it any more than that ,, weird I know,,,

the true test is in the air, but I think all will be well,,

going pro , one crash at a time

10-03-2016 10:36 PM
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paintermike

Heliman

Seattle, WA-United States

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Your one way bearing hub isn't slipping is it? My motor shaft broke when the locktite gave out and caused the hub to spin. I put in the KDE solid one piece hub on my 700L and it has not happened since.

10-05-2016 06:21 AM
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Richardmid1

rrProfessor

Leeds, England

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I must admit this is the first motor shaft snapping story ive read on here since the original 6s Trex 600E!

Considering how many Align helis are out there (more than all other manufacturers put together 10 times over.... probably!), even if there were 1000 cases of snapped motor shafts it would still be a very rare occurrence! I'm just saying.

60% of the time, it works every time!

10-05-2016 03:02 PM
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flyboy1985

Senior Heliman

mohnton pa

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I'm not sure if my owb is slipping, I did green loc tight it,
so it is a possibility

richard, I'm not sure how often you are online, but on another fourm there was a thread and quite a few people with a snapped motor shaft,

so I'm not sure how this is the first you've heard of a snapped shaft? oh well

either way this is happening , what is the root cause?
no one will know , but I'm gonna lean twards alignment issues for some, an for others a rare case of a weak shaft?

either way , the 750mx shaft will be a drop in fit for the 700mx motor..

going pro , one crash at a time

10-05-2016 07:16 PM
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flyboy1985

Senior Heliman

mohnton pa

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and on this thread some one also said it happened with a 750mx mototr with over 100+ 3d flights

going pro , one crash at a time

10-05-2016 07:23 PM
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flyboy1985

Senior Heliman

mohnton pa

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just incase you never seen these ,,

http://rc.runryder.com/helicopter/t698521p1/

http://www.helifreak.com/showthread.php?t=538313

going pro , one crash at a time

10-05-2016 07:29 PM
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