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HomeAircraftHelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Jr Vibe 90 SG - 120deg or 140deg swash
03-14-2010 12:57 PM  8 years agoPost 1
G Steyn

rrApprentice

Heidelberg, Transvaal, Suid Afrika

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With regards to building a Vibe 90 SG.

What would be the ideal for F3C? 120deg, or 140deg?

I am currently running 140deg, but found that my rolls are sloppy, one can obviously rectify the situation with mixes, but I'd rather go for the better setup. Was using Align 610s, to be replaced with BLS252s. Futaba 12FG TX.

Are there anybody with experience of both on the mentioned helicopter.

Greetings

Concentrate on your weaknesses and your strengths will reward you!

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03-14-2010 01:54 PM  8 years agoPost 2
synodontis

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United Kingdom

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140 to 120 is a downgrade - not an upgrade. Since you have no other option, stick to 140 and use the mixes to make the swash constant on pitch throws.

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03-14-2010 02:59 PM  8 years agoPost 3
mdu6

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Montreal

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I would say check your setup for interactions on the bench.

A good setup with good servos should show no or almost no interaction.

Also - check Scott recommandations (Sylphide with ASG head)

http://www.scottgrayrc.com/sylphide2009.html

Top 10 Most important setup notes that make all the difference:

Heli must balance on main shaft at 75% fuel
Heavy F3C 720 blades + paddles, with 3D settings on rotor head
(stable but agile)
Dampening set as hard as possible without wobble in hover
Effective cooling fan system
Dual Rate Hover - 50%
Exponential Hover - 30%
Pitch curve Hover - Very SHALLOW (non sensitive curve angle
Pitch curves - all linear. No bends or bumps on any curve.
RPM 1650 hover, 2100+ Stunt
Practice without changing setup too often

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03-14-2010 07:34 PM  8 years agoPost 4
G Steyn

rrApprentice

Heidelberg, Transvaal, Suid Afrika

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Reason for my asking is:

I have set up a Trex 500 over the weekend, and upon checking interaction at the paddles, found virtually NO adjustment needed accross the range.

I guess it might have been the DS610 cyclic servos on the Vibe. I'll keep you posted on the progress..

For now I'll keep it at 140deg, and just install the BLS252's.

mdu6, upon building the Vibe, I've spoken to Scott a few times, I must admit, he was really helpfull.
Yes, the guidelines you've given is spot-on.

Concentrate on your weaknesses and your strengths will reward you!

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03-14-2010 07:45 PM  8 years agoPost 5
synodontis

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United Kingdom

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I don't know much about the DS610 servos, but if it's anything to go by I wouldn't want to use them in an F3C heli. The BLS 252s are probably the best F3C servos you can buy, their price is justified.

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03-15-2010 04:25 AM  8 years agoPost 6
Jim Woodward

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Boca Raton, FL

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IF its any consolation, I just replaced some JR 8717's with BLS252's and the difference in head rigidity and precise measured movement was huge! There is essentially no gear train slop on the BLS252. I use a digital inclinometer attached to a meter to measure the pitch curve stuff and on each blade. Using the swash plate leveler and a Futaba 12FG swash mixing screen, the BLS252s basically had no more than 1.0% on a single mix, where as the 8717 has higher mix numbers on almost every mix.

I'm a beginner precision pilot, so anything that helps the helicopter fly easier is very recognizable. This was on a JR Vibe 90 3D.
thanks,
Jim W.

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HomeAircraftHelicopterJR Heli Vibe 90/50, Sylphide 90, GSR260 › Jr Vibe 90 SG - 120deg or 140deg swash
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