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HelicopterRobbe Cuatro - Millennium - Nova - Dyna-X › Ball links wear on tail rod
09-05-2003 08:55 AM  14 years agoPost 1
I3DM

rrProfessor

Israel

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Hello guys.
on my millie2 80 i got a Quick UK tail rod, that comes with rocket city links on both ends.
the problem is that the link on the rear (tail) side is wearing rather quickly, and thats weird because on the front (servo) end the other link isnt wearing at all.
now, its not the brass ball joint wearing out (like i initially thought) because when i pop on a new link, its tight again.
any ideas ?
thanks.

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09-05-2003 10:23 AM  14 years agoPost 2
I3DM

rrProfessor

Israel

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even is thats the case, that still doesnt explain why only the rear end is the one that's wearing... ???

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09-05-2003 12:43 PM  14 years agoPost 3
Tom Carne

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Western Australia

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Wise old Robbe pro told me to deffinately get rid of the brass balls. The tail is also floating around way out there and does collect a fair amount a crap. I got a K&S upgrade tail pushrod for my SE. Didn't think much of the pushrod in sleve setup but the links came with small ball bearings fitted so absolutely no slop in them and should last for a long time.

No rain on flying days:)

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09-05-2003 02:14 PM  14 years agoPost 4
Ramster

rrApprentice

NJ

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robbefan,

Your problem is probably your engine’s natural frequency that has a node located exactly on that wearing link/ brass ball joint, change the engine to a 90 and your problems are solved.
In other words just change that link/ ball and go fly.


Ron

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09-05-2003 09:17 PM  14 years agoPost 5
I3DM

rrProfessor

Israel

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OK, i just changed the rear ball to steel, we'll see how it works out...
thanks for the tip.

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09-05-2003 11:32 PM  14 years agoPost 6
Tom Carne

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Western Australia

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While you are at it I would suggest changing the brass balls on the throttle as well. These ones are in for a little torture over time and wear quickly.

No rain on flying days:)

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09-06-2003 12:30 AM  14 years agoPost 7
I3DM

rrProfessor

Israel

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youre probably right, so whats the deal ? why does robbe even bother with the brass balls ?

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09-06-2003 12:57 AM  14 years agoPost 8
ESchmidt

rrApprentice

Salem, NH

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hehehehe....brass balls

Sorry...just had to

Eric

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09-06-2003 01:21 AM  14 years agoPost 9
Tom Carne

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Western Australia

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They may have thought these were better at one time and have not made any changes. But the general consensus is that they wear out to quickly. You could say the same for X-Cell using a plastic link for the rudder setup. Now thats a really bad idea.

No rain on flying days:)

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09-06-2003 02:07 AM  14 years agoPost 10
sluggo

rrElite Veteran

Kitchener Ont

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I used the brass balls all last year on my milli and never had any trouble with them. I had about 300 flights on it and it is still going with the same ball with the new owner. If you have a spare ball that they use on the bell cranks that should work great.

That link does pick up alot of oil and grimme. I always found that the pitch links that the tail blade grips attach to always wear very quicky though.

Chris

Teambob00

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09-07-2003 12:40 AM  14 years agoPost 11
Tom Carne

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Western Australia

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The ball on the tail pitch slider is the one to watch. That bit of slop that develops can cause your gyro to hunt.

No rain on flying days:)

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HelicopterRobbe Cuatro - Millennium - Nova - Dyna-X › Ball links wear on tail rod
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