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HelicopterSynergy R/COther › Head Setup: How do i get enough cyclic nick?
09-12-2007 06:15 PM  10 years agoPost 21
Chuckie

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Crofton Maryland

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Grind the N9 swash, what a shame.

I'd suggest you install the longer link balls on the hiller and seesaw (see http://www.runryder.com/helicopter/t361526p1/). This will give you 2 more degrees of cyclic for the same swash movement. If that is not enough then add washers or use the long link ball on the inner ring of the swash, where the long bell rods are connected.

Charles

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09-13-2007 12:00 AM  10 years agoPost 22
Roger Hamilton

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Surrey, England

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I tend to leave the swash so that it can touch the elevator push rod at full low stick and cyclic stick in the corner. That is the equivalent of pulling not far short of 20 degrees of blade pitch and that is unlikely to be achieved in normal flight. Similarly, it is no big issue if the swash slightly touches the pushrod momentarily in any case.

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09-13-2007 08:21 PM  10 years agoPost 23
MJA

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UK

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Thanks Chuckie,i'll consider that instead of hacking the swash.

A few points..

The longer balls or washers on the inner ring of the swash will definately directly increase the swash to cyclic input as you say

I'm not so sure about the longer balls or washers on the upper arms and see-saw mod though.That looks to me to do more with avoiding the link pop off situation without haveing to grind the upper arms or shave the inside of the links.
If you look at or imagine the geometry before and after so to speak,the longer ball actually reduces the swash to blade grip cyclic input a little and also reduces the flybar tilt to blade input (changes the flybar ratio).So you'd probably get an overall increase in cyclic response doing that mod in isolation at the expense of some loss of flybar auto stability.In other words putting the longer balls on upper blade grip arms and see saw has a similiar effect to shifting the ball postion on the see saw to a further in position,loseing some of the stabilisation effect from the flybar.I would imagine this would make it even quicker responding to cyclics, but perhaps further lose some tracking qualities and make it less well behaved hovering in wind.
For pure stick banging this would be great, but perhaps make it slightly less well behaved for fast large open stuff

Martin

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09-14-2007 07:47 PM  10 years agoPost 24
Chuckie

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Crofton Maryland

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Martin,

I measured the cyclic throws with a pitch gauge before and after installing the long ball links on the seesaw and hiller mixer and it went up as I said. In my simple mind I can only imagine the total cyclic increasing when adding longer ball links. Yes the bell/hiller ratio does go down a little.

Many people are using the longer flybar but my first kit had the shorter one. I installed the longer flybar at the same time I installed the longer link balls. In my experience I felt the heli high speed tracking and hovering stability was improved.

Charles

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09-14-2007 10:15 PM  10 years agoPost 25
Ensonic

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GERMANY, Stuttgart

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Made the Update today. Now I have +/- 13 Degrees Pitch and i I want + /- 11 Degrees on the cyclics. I installed long balls on the mixer & seasas and on the swashplate. here you have to grind some metal to get space for the ballends. I am happy

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09-18-2007 01:54 AM  10 years agoPost 26
MJA

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UK

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Charles,
Sorry,i was completely wrong.My visualisation testing was badly flawed.When i was looking at the effect the longer ball would have on the control of the blade grip versus the short one, it appeared it would roll pitch out of the blade and grip ie trailing edge of blade reduces pitch relative to leading edge with the longer ball vs shorter.However when i've checked this again i've realised that the blade i kept looking at
when i tilted the swash to put positive pitch on that blade was the cyclicly retreating blade not the advanceing one,so less is actually more if you know what i mean.

I tried the mod at the weekend with just the long balls on the hiller arms and see-saw ,for now.To see the effect in isolation from swash longer ball mod.

It definately responds noticeably quicker and yes also seems to track/handle even better than before.

Thanks,

Martin

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09-18-2007 05:08 PM  10 years agoPost 27
Chuckie

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Crofton Maryland

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Good to hear Martin. I had a hard time visualizing your visualiztion.

Charles

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HelicopterSynergy R/COther › Head Setup: How do i get enough cyclic nick?
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