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04-22-2009 01:44 AM  9 years agoPost 1
ZR2Chevy22

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Kemah, TX

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Hey Mel,

Could you check out this setup file for my Knight 50 3D and see if it looks ok.

On the collective slider 63 gives me +-13 pitch and on the setup tab the cyclic ring at 35 gives me +-10 on cyclic.

Thanks in advance.

http://www.mad3deez.com/andrew/Knight503D-1.vbr

Andrew

It's Chevy's Fault!!!!
Team Me

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04-22-2009 02:19 AM  9 years agoPost 2
beavis1

rrKey Veteran

New York state

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Are you running the Knight conversion head.

My knight with the factory conversion head only gets 11 deg at 68 collective I wonder why your more aggresive how far out are you on the servo arms ?

Other than that I am the same as you on almost every peramater and mine flies fantastic

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04-22-2009 02:38 AM  9 years agoPost 3
ZR2Chevy22

rrApprentice

Kemah, TX

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I have my balls closer in on the servo arms. I did that when I was flying flybarred to make it faster.

Andrew

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04-22-2009 02:58 AM  9 years agoPost 4
beavis1

rrKey Veteran

New York state

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Got ya splains the lower number and higher pitch.

I thought the V-bar did not like aggresive ratios from the mechanical set read up on the wiki page. The section that goes over bell crank helis.

I was thinking of going out even further to get my number up where the logo and rex conversion heads seem to be running for collective numbers. Thinking it would give the gyro to servo more resolution?

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04-22-2009 03:01 AM  9 years agoPost 5
ZR2Chevy22

rrApprentice

Kemah, TX

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All I did was moved the balls in to be the same distance apart as the bell cranks. I think that put's the balls around 11mm.... manual called for 13mm I believe.

Andrew

It's Chevy's Fault!!!!
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04-22-2009 06:10 AM  9 years agoPost 6
OICU812

rrMaster

Edson, Alberta, Canada

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It is sleeping time in Sweden still.

...Once upon a time there were Nitros, flybars and frequency pins...

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04-22-2009 06:36 AM  9 years agoPost 7
Heliplanet.de

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Aidlingen, near Stuttgart, Germany

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On the collective slider 63 gives me +-13 pitch and on the setup tab the cyclic ring at 35 gives me +-10 on cyclic.
Uhh ... sorry this seems to be a horrible geometry!

A Logo 500 has about 11 deg positive collective at 80 collective common and 100% TX Signal. Also the Logo has about 10 deg cyclcic (start at 0 collective) at 100% cyclic TX input one axis and 100 cyclic gain 70 cyclic ring.

So ... modify your geometry first.

You should reach this values in setup mode as described above:

Collective 10 ... 13 deg.
Cyclic 8 ... 13 deg.
Cyclic ring w/o binding 60...80

Then adjust the cyclic gain in this way until you get our 10 deg. as the logo has.

MIkado VBar - what else ;-)

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04-22-2009 07:41 AM  9 years agoPost 8
MrMel

rrProfessor

Gotland

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Morning

Yeah, you need to adjust mechanically to get higher cyclic/collective values in the program.

I flew my T700N with < 70 collective and it didnt fly well, not until I got it > 70 by changing mechanically setup it flew perfect, at 63 the slightest little slop anywhere will show, and stress on the servos will be alot.

I usually lower Cyclic Gain instead of Cyclic Ring, so I cant say how far your off right now, but with collective at 63 you have a distance left to go.

ball on servo horn more inwards, maingrip balls farther away from the head, thats your ticket (or change ratio on any arms inbetween)

If you find yourself with "ok" collective, but still a little high cyclic, smaller (shorter) balls on the swash will help.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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04-22-2009 07:43 AM  9 years agoPost 9
MrMel

rrProfessor

Gotland

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Please post some pictures of the conversion if you can.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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04-22-2009 07:57 PM  9 years agoPost 10
beavis1

rrKey Veteran

New York state

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It is a mix of two mechanical items.
The ball distance on the blade grip is not as far away from the main shaft as reccomended on the knight flybar head.
That you can not change (easily)

The bell cranks also are not 1 to 1 ratio. the lever side to the swash is longer than the side to the servo push pull so it throws better than 1 to 1 I can take a picture tonight but that tells you where it does not make the V-bar reccomendations from the wiki for mechanical.

The only thing you can change is the servo arm length but with the bell crank mechanical ratio so high the V-bar will never be it will optimal.

I got to 70 changing servo arms and yes under 70 it was very ugly flying as described.

At 70 it seemed to be good.

I will take pics and give distances tonight

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04-23-2009 02:11 AM  9 years agoPost 11
ZR2Chevy22

rrApprentice

Kemah, TX

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I resetup the mechanics to the manual specs. I was at 13.5mm from center with my balls on the servo horn. I returned them to 11mm and it seems to make me take the number's higher now. I'm hovering around 75-80 on the collective for ~ +- 13 pitch. Haven't put a pitch guage on it yet but I'm pretty good at eyeballing. Cyclic I'll need to measure.

Andrew

It's Chevy's Fault!!!!
Team Me

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