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HomeAircraftHelicopterFlybarless Rotor Head SystemsV-Bar › v5.0 Pro - Useful Values vs Reality ... Trex 700
08-12-2010 01:40 AM  7 years agoPost 1
bkervaski

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Birmingham, AL, USA

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Guys,

In the 5.0 Pro software, I have a value of 60 for my collective travel and a value of 75 for my cyclic.

This gets me a perfect 13 degrees of pitch and 8 degrees of cyclic on my TREX 700.

However, the help text in the software says that useful values are 80-100, should I be concerned?

Also looking for baseline values for Agility, Main Rotor Gyro Gain, Yaw Rate, Tail Gyro Gain. I have everything set based on default values from the v4.0 preset, but based on my collective and cyclic values being so low, I wanted to see what others have come up with before flying.

Thanks for any suggestions.

Edit: At 13.5mm position on the Align 3G servo horns.

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08-12-2010 03:20 AM  7 years agoPost 2
Daved Gutierrez

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Chicago, IL

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Yes, you should have something between 80-110,if you have less means your servo arms are too big so start by changing your servo arms, how short depends on the geometry of the head you have Installed, I have my servo Arms at 8mm and using the RJX head.

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08-12-2010 03:56 AM  7 years agoPost 3
bkervaski

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Birmingham, AL, USA

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It's the Align 3G head, and I was using the same horns with 4.0, hmm ... wonder what I've done ...

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08-12-2010 04:15 AM  7 years agoPost 4
Daved Gutierrez

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Chicago, IL

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The aling head is about the same as the RJX one, only about 3mm wider so you need servo arms at 9mm maybe 10mm, In order to in the optimal range

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08-12-2010 07:18 AM  7 years agoPost 5
spdntckt

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San Jose, CA USA

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FWIW -

The align FBL head's spacing is actually less than the stock head with the mikado FBL grip extensions (i have used both). I wound up using the align FBl stock head block, but existing stock align flybar grips with the mikado FBL extensions. this, in combination with the align FBL servo arms with the inner hole, allows me to get to 85 on my collective travel and in the 90s on cyclic. i found it to fly better this way.

I suppose you could use even smaller servo arms, but the geometry wont be exactly the same.

Too bad there isn't a swash/bellcrank upgrade which can get closer to 1:1.. then we could have larger 16mm arms and have a geometry much closer to the logo...

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08-12-2010 03:01 PM  7 years agoPost 6
bkervaski

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Birmingham, AL, USA

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Ok, switching arms got me 13 degrees at 80 on the collective travel ...

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08-12-2010 03:30 PM  7 years agoPost 7
504Rone

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New Orleans, LA.

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What arms did you use?

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08-12-2010 03:55 PM  7 years agoPost 8
bkervaski

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Birmingham, AL, USA

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I used the standard Futaba star arms on the second hole, balls mounted in back, *all* linkage lengths set per the book.

It's actually more like 13.25 degrees, it's just over the 13 degree hash mark, you could probably get 14 degrees with these horns with no issues.

I think this is as close as possible with the 3G head and stock bellcranks. If you go in further on the servo horns the pitch is going to have to be limited to around 12 degrees or the linkage will rub.

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08-12-2010 03:59 PM  7 years agoPost 9
504Rone

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New Orleans, LA.

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Will those fit on ds610?

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08-12-2010 04:00 PM  7 years agoPost 10
bkervaski

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Birmingham, AL, USA

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Yep, the Align servo's use Futaba horns. They actually come with the star horn if you buy them outside of the kit.

I'm using BLS351's.

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08-12-2010 04:04 PM  7 years agoPost 11
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

I am in the same boat.

I want to convert a FB machine to FBL.

I have the Mikado grip extensions and Quick UK servo wheels.

Has anyone tried the bellcranks from the Align FBL machines, they have 2 holes. One in the normal position and one about 5mm closer to the bearing.

Regards
Paul

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08-12-2010 04:05 PM  7 years agoPost 12
bkervaski

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Birmingham, AL, USA

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I have the 700 3G kits, the bell cranks don't have any additional holes, new part maybe?

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08-12-2010 04:06 PM  7 years agoPost 13
504Rone

rrKey Veteran

New Orleans, LA.

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Yep, the Align servo's use Futaba horns. They actually come with the star horn if you buy them outside of the kit.

Thanks
 

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08-12-2010 05:04 PM  7 years agoPost 14
benben

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Taipei

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700e bell cranks have 2 holes.

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08-12-2010 06:31 PM  7 years agoPost 15
Paul Woodcock

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Dubai - United Arab Emirates

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Hi guys

So it is the 700e that has the 2 hole bell crank, thanks.

The pushrod geometry looks way off in the pictures. Is it that bad?
Does it affect the linear swash travel? etc, etc

Any info would be appreciated.

Regards
Paul

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08-13-2010 01:14 AM  7 years agoPost 16
bkervaski

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Birmingham, AL, USA

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Ok guys, flew great, but mushy, here's my settings:

Style: Precise
Agility: 46
Main Gyro Gain: 46

Yaw Rate: 100
Tail Gyro Gain: 85

Going to up the Agility and try again.

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08-13-2010 01:40 AM  7 years agoPost 17
bkervaski

rrElite Veteran

Birmingham, AL, USA

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Ok, question about a difference between v4 and v5:

The v4 TREX 700 preset suggests a Agility rate of around 45, however, the help text on v5 suggestions I need to set my agility to 90 for 3D flight.

It did feel mushy, so doubling the Agility sounds about right, you guys have any input?

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08-13-2010 02:21 AM  7 years agoPost 18
Daved Gutierrez

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Chicago, IL

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Start at 90 I have mine set at 110 and vivid on my velocity 50, good luck.

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08-14-2010 02:42 AM  7 years agoPost 19
Daved Gutierrez

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Chicago, IL

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i just checked my setup and found that i'm running Agility setting at 120 and Vivid.

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