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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Please help! Bell 222 .50 (Hawk mechs.) assembly
02-10-2006 04:59 PM  12 years agoPost 1
jmsilhy

rrApprentice

Austin, Texas

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Hi! I have a copule of questions I need to ask here before I proceed with my assembly. I hope you guys can help me...

1.-I'm using the box scale muffler from century, and the problem here is, I don't know how to make the throttle linkage work. Manual says, use the kit supplied throttle arm. I didn't get any arm! So I'm stuck using the engine's or a home made arm. By the way, engine is an OS 50. he problem is that if installed as it is supposed to be, the ball in the arm doesn't have clearance from the muffler. Mounted it on the inside of the arm (facing the engine) and the pushrod needs to be bent in a very weird way.

2.-Do you have any recommendations on how far out from the center the balls need to be on the servo arms for every control? I was thinking on using the same as in my Raptor 50 (10.5mm from center), but due to the differences in the head design, this might affect flying here.

3.-No boom supports. I'm not sr if it wil be allright without these, but I'm testing the mechanics first (pod and boom config.) and then install it into the fuselage.

Thaks for any help!

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02-10-2006 06:14 PM  12 years agoPost 2
SteveH

rrProfessor

Texas

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jmsilhy,

For testing of the heli in pod and boom configuration, I would rig some sort of boom support temporarily.

The throttle arm length of 10 mm will work fine, assuming you have a computer radio with end point adjustments, and who doesn't these days.

The throttle connection with the scale box muffler is a problem. All I can tell you is you have to do what is necessary to make it work. On the one that I built, I used an airplane clevis on the carb arm and that gave me the clearance needed, but it was still very close.

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

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02-10-2006 07:10 PM  12 years agoPost 3
Max_Power

rrApprentice

Savage,Minnesota

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Yeah, I had to jig up and laminate about 3 exhaust gaskets together to get my throttle to clear on my hawk/a109/os37. And still had to do a little trimming/grinding to get it far enough away that I wasnt scared it would cook my ball link. Make sure you laminate the gaskets good to avoid a mess....I'm waiting to break a muffler so I can make a nices spacer out of the old flange....If youre flying in pod and boom first I would get some boom supports rigged....And its worth buying a set of tailfins for the testing because its either gonna be them or the tailblades...at about the same price I'd rather invest in fins I might use later than tailblades to throw away,lol..plus makes mounting boom supports much easier.

Take heed in thy rotor speed, Lest the Earth reach up and smacketh thee!!

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02-10-2006 07:33 PM  12 years agoPost 4
jackheli

rrProfessor

Vancouver - Canada

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PM Oldfart he will certainly be of help.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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02-10-2006 10:45 PM  12 years agoPost 5
bellecrank

rrVeteran

Canada

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If memory serves me correctly re: the OS50 carb, you can just use a spacer between the throttle arm and the barrel and mount the ball on the inside of the arm.

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02-10-2006 11:51 PM  12 years agoPost 6
BC Don

rrElite Veteran

Calgary, AB Canada

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Would the purple bling throttle arm help if you put the ball on the inside?

Got Money? Send it to me, I'm a Heli Addict.

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02-11-2006 12:37 AM  12 years agoPost 7
jmsilhy

rrApprentice

Austin, Texas

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Thank you for all the replies, I'll have to try out some of these suggestions. I like the airplane linkage idea, do you see any drawbacks whatsoever for doing this? I think this would give me clearance and work pretty well!

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02-11-2006 12:55 AM  12 years agoPost 8
BC Don

rrElite Veteran

Calgary, AB Canada

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As long as there is enough clearance so that you can fully open and close the throttle I think the airplane clevis would work just fine. You could use either a platic or metal one.

Got Money? Send it to me, I'm a Heli Addict.

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02-11-2006 12:59 AM  12 years agoPost 9
SteveH

rrProfessor

Texas

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jmsilhy,

There's nothing wrong with using a clevis on the throttle because the control rod never has to move in more than one plane. I personally, would not use a metal clevis because they can loosen on the push rod and then you have a loose metal to metal connection that can potentially cause radio noise.

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

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02-11-2006 07:17 AM  12 years agoPost 10
jmsilhy

rrApprentice

Austin, Texas

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Update
Ok guys, clevis works! I used plastic and finally managed to get the pushrod bent so it would clear the muffler and move the arm full travel. We'll see how it works in the air.

So about the blades, what is the absolute maximum we could use on a scale ship, with the OS 50? I suppose that since it will be flying scale, and not 3D, maybe a larger set will fly the fuse better, even with the headspeed reduced...

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02-11-2006 12:43 PM  12 years agoPost 11
SteveH

rrProfessor

Texas

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About blades...I would use the longest blades that will fit without hitting the tail rotor blades. Believe me, you don't want that to happen.

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

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02-12-2006 03:49 PM  12 years agoPost 12
Robbiett2

rrNovice

Virginia Beach, VA

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i am using mavrick 580 carbon which works fine for my bell 222 with a OS50. 580's loads up the moter more so ur not over reving engine. i have heard of doing 600 but i want to stay safe with 580's.

Robert

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