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Home✈️Aircraft🚁HelicopterAlignOther › Whats this? "Feathering Shaft Bushing Set HN6061"
07-30-2007 12:46 PM  13 years ago
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tchavei

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Portugal

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Whats this? "Feathering Shaft Bushing Set HN6061"
I just found this on Align's website... seems like a way to stiffen the head?
http://www.align.com.tw/shop/produc...roducts_id=1886

Any inputs about this?

--------------------
"Perfection and patience usually walk side by side..."
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07-30-2007 05:13 PM  13 years ago
Barney

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Inverness Scotland

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Thats exactly what it looks like...you sleeve the spindle to tighten up the dampners..I believe some of the MA flyers used to add a few wraps of tape to their spindles

I,ve not had any excessive wear since adding a shim each side. I think it is MA (Miniture Aircraft) pt no 0329...I tried two sizes other being 0429?. Both sizes work but the thinner of the two seems to be the better option otherwise you get a wobble at low headspeeds.

I did think about adding a layer of heatshrink round the spindle to achieve the same result a while back but opted for the shims as I had them handy.
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07-30-2007 06:59 PM  13 years ago
Jason Bell

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California

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Wonderful Idea!

I too added a raptor 90 shim to my head, the dampening still is gone, but I figured I would try it.

So the shrink tubing goes all they way out to the dampers correct?
AMain.com
Mikado "V Team"
Xnova Motors
Optipower USA
RCProPlus
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07-30-2007 07:18 PM  13 years ago
hootowl

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Garnet Valley, Pa.

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If the dampners are the same it's a waste
The trend is o-rings
Wolves don't lose sleep over the opinions of sheep
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07-30-2007 08:07 PM  13 years ago
bjacks

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Ft. Worth, Tex.

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Dampers
Has anybody try M.A. #844-12 dampers, it looks like it would work. Bobby
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07-30-2007 09:15 PM  13 years ago
Barney

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Inverness Scotland

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Jason...Yes..I would sleeve it out with one piece till the step in the spindle at each end, but leave the overlap on the end untill you push the spindle through the dampners as it will likely be a tightish push...afterwards trim flush with the step.

The theory is...Instead of pre-loading the grip bearings/dampners like the shims do it will increase the dia of the spindle compressing the washers outwards as well as expanding them only very slightly width wise.

Hopefully this reduces the preload on the grip bearings and prevents the low speed wobble
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07-30-2007 09:31 PM  13 years ago
Jason Bell

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California

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Jason...Yes..I would sleeve it out with one piece till the step in the spindle at each end, but leave the overlap on the end untill you push the spindle through the dampners as it will likely be a tightish push...afterwards trim flush with the step.
Cool, I may try this step with some shrink tubing at home. Or just wait for invinivation dampers that should be here soon.Well see.
AMain.com
Mikado "V Team"
Xnova Motors
Optipower USA
RCProPlus
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07-30-2007 10:48 PM  13 years ago
JRjoe

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Jonesville , IN USA #1

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If you take it all the way out to the step,then how do you get the grips on???

I think you just need to keep it inside the head block out to the 2nd dampner.....

JRjoe.....
Indoor plumbing??? No, we don't need that!!!
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07-30-2007 11:11 PM  13 years ago
ev0l

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Kansas City Missouri

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I am told metal blade grips take care of all this damper rubbish thats going on. Guys at a local fly in had 50 flights on their stock black Align dampers with metal grips. I dont know first hand yet, but the blade grips on are the top of my upgrade list so I will keep you posted.
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07-30-2007 11:57 PM  13 years ago
Barney

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Inverness Scotland

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Good call tailspin...Yes I should have said flush with the grip bearing
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07-31-2007 12:23 AM  13 years ago
wolfcbr2003

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Washington

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Bushing
I dont think the sleeve has anything to do with the Dampers!

I have the metal blade grips on both my 600N and it is very tight.

I think this is a bushing to cover the Spindle so that there is not touching of metal to metal inside the head (Spindle to inside of head block), that way there is no chance of a lockout.

The Synergy does this also with the spacer.

My 1/2C
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07-31-2007 06:02 AM  13 years ago
rcmarty

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Penticton , B.C. CANADA

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ev01 .. i have to disagree with you. My 600e heli had metal grips from day 1 , plastic grips didn't even make it out of the box. 27 flights later (have been assembled for about 5-6 months) they were so bad the blades were going out of track. Absolute bugger to fly nice. They were lubed with dielectirc grease. I put a new set in there but didn't lube them as i've read they last longer that way.

My thought on the sleeve ....

I think the idea is to make the dampers last longer. When a heavy load is put on them they take the brunt of the force. Now if they were to 'dampen' a little and when there compressed (loaded to a certian point) the sleeve will take over with a hard connection to the headblock, therefore the dampers take less of a beating and last longer. In theory it should sharpen up the 'pop'.

Maby it's the evolution of the spindle with the ball on it ...
Any want to guess what other heli i have ?

Martin
What goes up will come down.... one way or another !
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07-31-2007 06:27 AM  13 years ago
wolfcbr2003

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Washington

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Rcmarty

My experience with the 600e that I had for over a year was not the same as yours. The Metal balde grips made a considerable difference on the dampers.

I have 2 600N's 1 with 4+ gallons through it. Lets see 4 gallons and about 10 flights per gallon or so. 40+ flights on it with Metal blade grips and still they are tight enough that I still get the bobble during Autos from too much dampening.

Everyone seems to have their own experiences which makes it hard to find a solution.

Someone has a bad bearing someone does not. My 600E never an issue, 1 of my N's has an issue with 1 way.

Go figure...
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08-01-2007 03:42 PM  13 years ago
drdot

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So. California, Orange County.

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fwiw..

This is an interesting upgrade...Vigor had a similar system with a ball in the center of the spindle, this should minimize pitch /delta changes caused by rapid collective shifts,and get the blades to fly in track better around center during high cyclic maneuvers....

JOhn.
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