RunRyder - I want more cyclic response HAWK IV

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Century Hawk - Falcon - Raven - Predator > I want more cyclic response HAWK IV

JCadwell
Key Veteran
Location: Richland WA/ Morro Bay, CA

I'm flying my Hawk IV, and I need more cyclic response. I am running the headspeed about 1800 with fiberglass 550s, and an OS32. I have the links set up for 3D, and am running the Century aftermarket flybar paddles with no weights, in the back hole. Any ideas to make this thing even more twitchy? Thanks for any ideas.

Thanks, John Cadwell

04-19-2002 Over year old.

ltaustin1e5
Senior Heliman
Location: EVANSVILLE, IN

more cyclic response

on your bell mixer arm use the same length balls on mixer instead of one short ball and one long ball. this increases the bell/hiller mixing.

04-19-2002 Over year old.

crash-
Veteran
Location: Ca

How much cyclic are you putting to the blades 6 ?

04-19-2002 Over year old.

HOMEPAGE

JCadwell
Key Veteran
Location: Richland WA/ Morro Bay, CA

So your saying use either both long balls or both short balls? Or doesn't matter?

Thanks, John Cadwell

04-19-2002 Over year old.

ltaustin1e5
Senior Heliman
Location: EVANSVILLE, IN

more cyclic

use long balls on both sides of mixer

04-19-2002 Over year old.

the Wasp
rrProfessor
Location: Vt

Cadwell,,, that's real easy,, turn your paddles in 2/3 turns, this will quicken things up,,, and longer servo arms !!!

the Wasp

04-19-2002 Over year old.

JCadwell
Key Veteran
Location: Richland WA/ Morro Bay, CA

I'm already at the mechanical limits of the swashplate, so I need some geometric method or physics method of generating increased cyclic sensitivity. The link change sounds like a good start. As for the paddles, I have them screwed in as far as they will go. No flybar weights either. I did change the lengths of some of the links in the head to try to speed things up... I compared the 3D lengths to the Sport lengths in the manual, and increased the difference to perhaps evoke even more of a 3D response. Didn't seem to do much. Perhaps lengthening the mixing arms would do something...

My basic issue is this. I can loop, flip, roll, and generally wring out my Sceadu 50. The Hawk has enough power to do loops and rolls, but I can't get it to respond quickly enough to inputs... Rolls are like watching the second hand on a clock, and loops aren't a whole lot better. I want a faster roll rate, and a faster loop, or flip rate.

Thanks, John Cadwell

04-19-2002 Over year old.

the Wasp
rrProfessor
Location: Vt

Well I like my Hawk4 SE2, but that 2 peace main shaft,,, you could have a machine shop turn (and then grind) a custom main shaft and then you could use a more expensive rotor head off an XCell or Bergen..
I know this may defeat the idea of the less expensive Hawk, but for myself I can't leave things alone, I love to modify things,, big time !!,,, and I plan to do this when I become a better flyer !

the Wasp

04-19-2002 Over year old.

Rotomotion
Heliman
Location: Charleston, SC

I went through this

I went through the same problems with my Falcon. I don't have a Hawk, but I hear they are identical in all regards with the head and transmission. Also, this was a FalconSE, but again, I think the heads are equivalent.

See this link for my post explaining what I did in detail. I now get monster cyclic.

http://www.runryder.com/showtopic.htm?s=&topicid=2853

Dennis

04-20-2002 Over year old.

HOMEPAGE

bern
Heliman
Location:

Someone told me to add throttle/aileron and thr/ele mixing.
Mix full thottle at full deflection of each surface.
Haven't tried it yet but makes sense.

04-25-2002 Over year old.

oldfart
Elite Veteran
Location: Vancouver, Canada

Cyclic response

JC

One of the big advantages of the Century head is the many ways you can tune the bell/hiller ratio to give you a faster or slower cyclic response rate.

If you want a faster cyclic rate here are some of the things you can do (in the order of preference):
1) be sure you have 6 or 7 degrees of cyclic throw.
2) move the flybar weights to as close in to the head as possible or remove them completely
3) move the washout-A arms from the long balls on the inner star of the swashplate to the short balls and the control rods to the bell/hiller mixers on the blade grips to the long balls.
4) use two ball joints with a medium length standoff on the bell/hiller mixer instead of the one short and one long one that is standard.
5) as the power of a 30 size engine is far less then that of a 50, using a high percentage of cyclic to throttle mixing for any sort of aerobatics is a big help. Note: it is not possible to get a 30 size heli to perform like the a 50 size, specially one equiped with the OS50H powerhouse.
6) change to the KS-328 flybar paddles (this will make any heli more twitchy in the hover though)

The Century rotor head can be set up to be very responsive cyclicly. In fact a local fellow has changed the head on his TSK Mystar 46 to one from the Falcon SE to achieve a max cyclic rate.

Enjoy
Phil

04-30-2002 Over year old.

Trace
Senior Heliman
Location: Wildwood, MO

JC,

What's the word on getting your Hawk cyclic cranked up? Have you had a chance to get it dialed up yet?

Phil,
That was a terrific list of specific recomendations for tuning the cyclic on a century. I am going to print that off and put it in my tech reference folder.

05-09-2002 Over year old.

oldfart
Elite Veteran
Location: Vancouver, Canada

Cyclic response

Your Welcome Trace
Glad to help any Hawk/Falcon flyer. Maybe we will get to meet at one of the Fun Fly events in WA this coming summer.
Phil

05-10-2002 Over year old.

the Wasp
rrProfessor
Location: Vt

John,,, do you still want more quicker head response, try this, take your fly paddles off and shorten you fly-bar on each side, start small like about 1 MM, 1 millimeter is .040",,, so if you shorten each side 1 MM thats 080"..

the Wasp

05-23-2002 Over year old.

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Century Hawk - Falcon - Raven - Predator > I want more cyclic response HAWK IV

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