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GrandRC . CanoMod . Futaba-RC

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Align T-REX 600N 700N > T-REX 600N Feathering Shaft SuperMod
 
 
Spackermen
Heliman
Location: Logan, Ut

After taking my feathering spindle apart a couple times and getting a little more than frustrated about having to take it to work with me to get the other bolt out, I devised a little scheme. I notched some wrench flats on the spindle so that it will be easier to take off the dreaded "other side" that never comes out. Let me know what you fellas think regarding whether this is a good idea or not. Before you all start ragging about it needs to be professionally done, I am a machinist by trade. I would most likely not recommend this as a thing to do with your dremels at home..

I may not know how to fly...
But at least I know how to CRASH
09-27-2008 11:42 AM
HOMEPAGE  
 
 
steffgiguere
Key Veteran
Location: St-Eustache, Quebec, Canada

Really nice idea and great looking work...now this is something the manufactures need to get up with....

I wish I could fly 24/7
09-27-2008 12:13 PM
 
 
2LTime
Veteran
Location: Walworth,NY

Another option. Find a buddy who owns or owned a Raptor V2. They will almost surely have a used clutch. The clutch has a 6mm one-way bearing. Insert the step on the spindle where the thrust bearing rides, I'm pretty sure it's 6mm. It should hold it pretty securely. People have been known to secure the clutch to putty knives or just take the one-way out and put it in a closed end wrench, drilled to the right size. There's probably many variations, but the general idea is to use a one-way bearing. Holds it securely and doesn't mar the spindle.


Jeff

If you can't learn to do it well, learn to enjoy doing it badly.
09-27-2008 12:39 PM
 
 
airdodger
Elite Veteran
Location: Johnston USA

Just put one end in a drill chuck, I would think most people have a drill at home.

Chris
09-27-2008 02:39 PM
 
 
playfair
Key Veteran
Location: Rochester, NY

Excuse my ignorance as I don't have a 'rex, but on my helis the only time I need to get the "other" bolt out is when I'm replacing the spindle because it's bent up, and then it doesn't matter if it gets mared up with vise grips.


The sky is our canvas
09-27-2008 02:43 PM
HOMEPAGE  
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Keyless chuck is all you need. No pliiers of wrench flats required.

TM

Buying tools is half of the equation, knowing how to use them is the other. - T Moore
09-27-2008 03:57 PM
HOMEPAGE  
 
 
Simmer
Key Veteran
Location: Massachusetts

a table vis and a thick wrapping of cloth/rag around it, or vie grips. It works and it wont hurt the spindle.
09-27-2008 05:39 PM
 
 
Spackermen
Heliman
Location: Logan, Ut

Haha it didn't take long for you guys to sh!t all over that idea !! It seemed like pure genius at the time (5 a.m.). It looks like everyone has different ideas to get it out.

I may not know how to fly...
But at least I know how to CRASH
09-27-2008 05:53 PM
HOMEPAGE  
 
 
Simmer
Key Veteran
Location: Massachusetts

If the manufacturers would build it, I would buy it.
09-27-2008 05:58 PM
 
 
PilotDaz
Veteran
Location: Seattle, WA

Quote 
Haha it didn't take long for you guys to sh!t all over that idea !!

I think it's a good idea, and I don't think anyone is sh!ting on it. I think they're all just throwing what they do in the mix.

Quote 
Excuse my ignorance as I don't have a 'rex, but on my helis the only time I need to get the "other" bolt out is when I'm replacing the spindle because it's bent up, and then it doesn't matter if it gets mared up with vise grips.

Or what if you just need to change the bearings?

I personally just use Vice-grips in the middle with a cloth rag. Nice idea though!

~Team Collective Mayhem - "My anger management class really PISSES ME OFF!"
09-27-2008 06:19 PM
 
 
HeliSmith
Senior Heliman
Location: Canyon Country, CA

Also curious as to why you need to get the bolt out without hurting the feathering shaft. I also have only removed this bolt if the shaft was bent and then a vice works pretty darn good.

*** Team HeliHobby.com ***
09-28-2008 06:01 AM
HOMEPAGE  
 
 
fiveoboy01
Veteran
Location: Waunakee, WI - USA

I think it's a great idea.

My only question is do you think it would weaken the feathering shaft or allow it to bend under very hard maneuvers?

Trex 450SA blinged, Trex 600N, DX7
09-28-2008 07:36 AM
 
 
Spackermen
Heliman
Location: Logan, Ut

I have been upgrading and changing a lot of things lately and everytime I go to change bearings or grips it won't come out I agree that it's not a common service point but it will be nice when it is done. Interesting question fiveoboy I think I may have an answer for you. In terms of lateral strength I don't believe that it weakens it at all. The end race where the bearings ride is 6mm also where I cut the flats is 6mm across. I think if I cut it any deeper than the smallest point on the end of the shaft it could compromise it. I also "led in " to the flats at a 45 degree angle and there is a .0065 radius in the "root interstction" of the 45' lead in and the flat. If there are any physics professors on RR this would be a good time to chime in.

I may not know how to fly...
But at least I know how to CRASH
09-28-2008 06:21 PM
HOMEPAGE  
 
 
TMoore
rrProfessor
Location: Cookeville, TN

It would be a lot easier to remove the feathering spindle if you didn't use loctite.

TM

Buying tools is half of the equation, knowing how to use them is the other. - T Moore
09-28-2008 06:28 PM
HOMEPAGE  
 
 
lowflyer101
Key Veteran
Location: garden grove, CA

Once it modded, the shaft is weaken, would not stand in crash. The align sharft is $3 or $6 for 2. I would not bother to do the this mod. If I need to replace feather shaft. I will use all force/ abuse know to man to take off the other bolt to remove thrust bearing. Usually takr me less than a min .

<-freedoom flyer->
09-28-2008 09:57 PM
 
 
Kinger
Elite Veteran
Location: Columbus, OH

A set of rubber grips mounted to the inside of the vice holds the shaft securely without marring it while you are getting the other bolt out.
09-29-2008 12:52 AM
 
 
Cowjock
Senior Heliman
Location: Collegeville, Pa.

Why bother notching the feathering spindel? Heck, if it's locktited in just heat the shaft with a heat gun, no big deal the bolt should come loose with minmal effort. If all else fails go get a acetylene torch. LOL

Quote 
It seemed like pure genius at the time (5 a.m.).


Yeah, I've had those kinda of ideas in the early hours of the morning too.

Damn that ground is hard!
09-29-2008 01:05 AM
 
 
HeliSmith
Senior Heliman
Location: Canyon Country, CA

Yeah we are taling about ..02 on the dollar here I have a bucket of bolts and 3 spare packs of feathering shafts at any given time. I have had those pure genious moments too seriously I am with you.

Want some ideas and have the machining ability? PM me I am full of them. Especially guys with the quality cnc stuff...

wordz

*** Team HeliHobby.com ***
09-29-2008 01:17 AM
HOMEPAGE  
 
 
Spackermen
Heliman
Location: Logan, Ut

Quote 
It would be a lot easier to remove the feathering spindle if you didn't use loctite.
WTF?! You don't loctite your main blade grips ?? No offense but I never want to fly with you ! The mains are like a motorcycle chain. No one ever thinks about it too hard, but it's the lifeblood of your heli. Why would you not loctite them?
Quote 
Once it modded, the shaft is weaken, would not stand in crash
The feathering and main spindles are the first and the always to replace in a crash IMO. it's not worth tracing down a vibration for a day, I would rather be flying...
Quote 
Want some ideas and have the machining ability? PM me I am full of them. Especially guys with the quality cnc stuff...
PM sent!

I may not know how to fly...
But at least I know how to CRASH
09-29-2008 05:29 PM
HOMEPAGE  
 
 
TMoore
rrProfessor
Location: Cookeville, TN

I've been flying these machines since 1977 and have only loctited a feathering spindle once. If you tighten the screws properly there is no need to loctite the bolts. Back in the days when the thrust bearings were a lot smaller, changeout was routine. Loctiting the bolts was a nuisance and we found that you didn't really have to do it if you tightened the blade axle properly.

If you are machinist like you say you are this should make perfect sense. I finished my apprenticeship in 1981. There are a ton of fasteners on CNC machines that don't get loctited but are torqued properly. Why do you think that the bolts on the engine cylinder head stay torqued and don't use loctite?

TM

Buying tools is half of the equation, knowing how to use them is the other. - T Moore
09-29-2008 05:38 PM
HOMEPAGE  
 
 
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Align T-REX 600N 700N > T-REX 600N Feathering Shaft SuperMod
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