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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Hawk pro, tail rotor servo help
02-10-2006 03:46 AM  12 years agoPost 1
RotoRob

rrApprentice

Clinton MI

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What way is the servo output shaft suppose to point? I've seen some photos of it pointing to the left and some pointing to the right, which makes more sense to me. Then the control wire is in a more direct line to the servo. When it's to the left the frame is in the way. When trying to fit the link on the horn it's trapped under frame.
Also how many mm's should the ball on the control horn be from the center of the servo?
I know it's been said before, but I can't belive how helpless this manual is.
Any help would be wonderful.

Thanks,
RR

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02-10-2006 04:01 AM  12 years agoPost 2
SteveH

rrProfessor

Texas

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RR,

I have my servo mount on the right, with the shaft to the Left. Use as long of an output arm as you can, but at least 10mm to the hole. With the gyro in NON heading hold mode, and the stick centered, put the arm on the servo so it forms a right angle with the push rod.

The government cannot give you anything without first taking it from someone else.

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02-10-2006 05:52 AM  12 years agoPost 3
CWOAV8R

rrApprentice

Naples, FL USA

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I have quite a few pics of the T/R servo setup on my Hawk Sport in my gallery, don't know if it will help you or not.

Just posted them so the thumbs have not been processed....

http://runryder.com/gallery/18268

I tried flying upside down once... but I couldn't take the blood rushing to my head.

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02-10-2006 03:10 PM  12 years agoPost 4
smackay

rrNovice

Rochester, Vermont

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RotoRob,
I had the exact same issue as you. I ended up putting mine pointing to the right. As you said, the frame is in the way and causes massive binding if it pointed to the left. Also, I think a super upgrade is to get rid of the stock pushrod and get a carbon fiber one. They have way less binding as you dont need the guides on the tail boom. And I have to agree that the manual could use a serious re-write...LOL..

CWOAV8R,
I noticed in your gallery that you also have the ball link support on the aileron servo. What is this for? I asked once before and nobody really explained its purpose. The one issue I have with these is they bypass the servo vibration dampers and provide a direct path for vibration into the servo. Wouldnt this be bad? or does its intended purpose outweigh the vibration issue?

Steve

Helicopters don't fly, They beat the air into submission.

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02-10-2006 03:18 PM  12 years agoPost 5
RotoRob

rrApprentice

Clinton MI

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Thanks Smackay, I think I'm going to give it a try. Because this is not going to work for me the way I have it now.
Do you think that the carbon rod is somthing that you can buy made up, or is it somthing you have to construct yourself.

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02-10-2006 03:27 PM  12 years agoPost 6
Lefty and Leroy

rrApprentice

Temple, Texas

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I noticed in your gallery that you also have the ball link support on the aileron servo. What is this for?
It is to help take the "load" off the bearing.

-Jim

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02-10-2006 04:17 PM  12 years agoPost 7
smackay

rrNovice

Rochester, Vermont

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RotoRob
Do you think that the carbon rod is somthing that you can buy made up, or is it somthing you have to construct yourself.
You can buy them in a kit, Just make sure you get a kit with a long enough rod. There pretty inexpensive but you have to cut the rod to length and epoxy on the ends. Well worth it though IMHO (And looks really cooooool!!.

Steve

Helicopters don't fly, They beat the air into submission.

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02-10-2006 04:29 PM  12 years agoPost 8
CWOAV8R

rrApprentice

Naples, FL USA

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smackay
I noticed in your gallery that you also have the ball link support on the aileron servo. What is this for?
On the Hawk, as you operate the collective the aileron linkages push and pull on the aileron servo horn and wear on the output shaft of the servo. I was visually disturbing to watch, now there is NO movement at all. I need to do the same to the elevator servo as well (it's not quite as bad) and will probably break down and just order the servo supports from Horizon.

As to the vibration, I can't say for certain but I would thing that the wear on the output shaft would kill the servo long before the vibration did.

Ed

I tried flying upside down once... but I couldn't take the blood rushing to my head.

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