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HelicopterAlignOther › interesting tail issue
08-11-2007 10:19 PM  10 years agoPost 1
JeepCJ

rrKey Veteran

Pennellville NY ​(Syracuse Heli​Group)

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After I crashed my Pro, I bought a sport to get back up quickly.
On the very first flight I noticed the tail was not holding well, it seemed all over the place. I bumped the gain back up to 37% but it was not much better. During hard collective/cyclic manuevers the tail was blowing out, tail down funnels, the tail was difficult to control. I thought I might have toasted my GY601. So then I put the tail assmebly (hub, grips, and 95mm Radix)from the Pro on the back, and right away I got a tail wag. I lowered the gain, and everything was perfect again. Rolling tail slides, fast backwards hurricanes, tail down funnels, nothing would upset it.
I was just wondering if the lousy tail control was because of the stock tail blades, or maybe issues with the thrust bearings in the grips, I have never had a Gy401 blow out on a nitro heli, let alone a GY601

Bob

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08-11-2007 10:43 PM  10 years agoPost 2
falcon

rrKey Veteran

UK

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I am running Radix tails and its still wandering doesn't feel locked.
I am going to mount the tail servo on the boom i think its the linkage that's causing the problem because my 600E is rock solid.

www.m0kwr.com

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08-11-2007 11:37 PM  10 years agoPost 3
FlaHeli

rrApprentice

Jacksonville. Fl-USA

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I noticed a real tightness in the pitch slider on the tailrotor shaft. If I take my hand and move the rod from up front it seems like it definitely has a high tight spot. Hoping that with the tail spinning and normal wear it will break in and slide easier.

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08-12-2007 01:15 AM  10 years agoPost 4
RLHeli

rrApprentice

Auckland - New​Zealand

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FalHeli, I concur with your finding but my machine is 600N Pro. What I have found was there was a "tooling mark" on the shaft and caused the high spot.
All I did was running #1000 sand paper over it a few times and it was gone.
Hard to spot it by naked eye but as soon as you run sand paper over it, the debrit will accumulate in the low spot then you can see it.

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08-12-2007 08:15 AM  10 years agoPost 5
falcon

rrKey Veteran

UK

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I bedded mine in with a fine abrasive paste mine also had a tight spot.
I did that before i flew the 600 but it didn't help its nice and free and so is the linkage but its still not right

www.m0kwr.com

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09-13-2007 02:38 AM  10 years agoPost 6
nitro_joe

rrApprentice

Totowa, NJ

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I am having the same issue with my 600N sport kit. When I move the tail rotor to the left or right, the slide shaft sounds like a servo moving. At 1st I thought I tightened the linkage ball too much but after I took it apart I can see a high spot on the shaft.
Guess I'll have to get some sand paper.

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09-13-2007 02:48 AM  10 years agoPost 7
tchavei

rrProfessor

Portugal

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I solved my problem with a new tail rotor... for some reason the one in the kit had both thrust races (inner and outer) the same size and was around 3.98mm thick when assembled.

The new rotor that came (same part number btw) has the inner race at 10.02mm, the outer race at 9.86mm and when assembled the whole thing has like 3.94 or less (can't remember the exact value now). They are thinner than the kit's tail rotor thrust bearings

Wierd huh?

TOny


--------------------
"Perfection and patience usually walk side by side..."

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09-13-2007 02:58 AM  10 years agoPost 8
nitro_joe

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Totowa, NJ

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Very weird. I guess I will also be ordering a new tail rotor. Spares never hurt.

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09-13-2007 03:12 AM  10 years agoPost 9
JMF

rrApprentice

Clinton

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ARFjoe, I am having the same problem I think. Kind of like the tail slider is stuttering across the shaft? Ratcheting effect kind of. I am putting the servo on the tail with a CF pushrod. Never had any problems that way. including the servo being ruined from the smoke residue.
But something is up with that shaft FOR SURE

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09-13-2007 05:15 PM  10 years agoPost 10
AndyH

rrKey Veteran

Rockledge, FL

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I had the tightness of the slider on the shaft problem on my 600E. Took the shaft out chucked it in my drill and sanded it a bit, perfect.

My 600N sport kit was perfect outta the box though. Running the stock tail blades and a 601 and it holds like a rock..

This hobby is like Kryptonite to chicks!

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