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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk Pro Tail Pitch Links SUPER TIGHT?!
01-18-2010 06:19 AM  8 years agoPost 1
lovespicyfood

rrApprentice

Westlake Village, CA- U.S.A.

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Hi Everyone,

I recently purchased a very lightly used Hawk Pro. Going through the tail, I noticed the action was very stiff. I broke it down and determined that the tail pitch links are SUPER TIGHT.

Not the ball links that attach to the tail grips, but the part of the tail pitch links that attaches to the slider. It appears there are axles press fit into the tail slider.

Is there any way to make these links looser/smoother?

I was thinking of pressing the axels out and boring the holes out just a touch...

Anybody else experience this? The action is very stiff as a direct result of this issue. Everything else is very nice.

Thanks for your help!
Pete

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01-18-2010 03:59 PM  8 years agoPost 2
HelBilly

rrNovice

Birdsboro Pa

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I resized my links I think the width was tight as well as the hole in the arms. ruff up the middle of the axle drill a SMALL hole in the slider and put a dab of thin CA was my fix.

Every solution breeds new problems

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01-18-2010 05:19 PM  8 years agoPost 3
lovespicyfood

rrApprentice

Westlake Village, CA- U.S.A.

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Thanks for the reply and the picture! Yea, it is TIGHT! I don't know how the gentlemen before me flew it without it being an issue. It must have put a lot of strain on the servo!

I see that Century lists shows this part without the pins installed...hmmm...I need to find my pinion puller as I'm sure that would do the trick!

Thanks Again,
Pete

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01-18-2010 07:33 PM  8 years agoPost 4
Mike0251

rrVeteran

Hills of the Blue Ridge VA

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9256...lol. Had no issues

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01-19-2010 06:55 AM  8 years agoPost 5
lovespicyfood

rrApprentice

Westlake Village, CA- U.S.A.

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Sorry Mike...I certainly was not meaning to insinuate anything lacking of your experience with the heli!

I guess I have a bad habit of checking for smoothness of the tail action and this one was SUPER STIFF to me. I'm a little paranoid from an ~6-8 MONTH "incurable" wag I had on my 600N Pro.

The absolutely WEIRD thing about that issue was that it came down to using too thick of a grease in the tail thrust bearings. Who would've thought that, eh? Several hundreds of dollars later I figured it out...

Oh well, at least I got it fixed!

I popped the pins out of the tail slider and it's easy to see that the pitch link arms are splayed a little when attached. I posted this thread on another forum and a few people responded with this exact problem and did whwat I'm going to do: file off just a "touch" of the slider. I'm happy I found my little gear puller! I even used it to take off the tail hub and it was on tight. I love gear pullers...

I'm still waiting to get my gyro/servo for this thing and hopefully I'll maiden after southern California gets out of this wet weather pattern... Or course, I only have one more month to finish my graduate degree so I imagine that will take up a lot of my time very soon...

Regards,
Pete

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01-19-2010 09:56 AM  8 years agoPost 6
Mike0251

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Hills of the Blue Ridge VA

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No problem Pete, at all. Like I had said the bird is new. That is an interesting find you have there. I had noticed it was not real easy in movment but chose just to leave it as my brother had no interest in learning to fly. By all means post all your questions as I certainly have no real in depth knowledge of this brand. I was just poking fun...lol. Good luck with it!

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01-20-2010 02:48 AM  8 years agoPost 7
Gearhead

rrMaster

Vt

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Pete my new Century friend !!,,
just push out the Pins that hold the Links on the Pitch Plate, then use a Fine File or Sand Paper and file/sand the sides of the Pitch Plate where the Pins go in, just file/sand a tiny bit so the Links wont rub against the pitch Plate, then remount the Links,, it should be nice and smooth,,

to add, sometimes the Links drag on the Grip's Balls, I just use a fine Sand Paper like 600 grit or finer and Oil Sand the Balls just enough to remove the Protective Coating,,, just a little sanding is all it needs and you need to use Oil..

Jim
Buzz Buzz Buzz

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01-20-2010 03:40 AM  8 years agoPost 8
lovespicyfood

rrApprentice

Westlake Village, CA- U.S.A.

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Thanks the Wasp! I plan on getting her back together this weekend. Hopefully my gyro/servo come in the mail this week...

Pete

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