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HomeAircraftHelicopterFlybarless Rotor Head SystemsOther › To those futzing with electronic pitch gauges...
01-26-2012 06:03 AM  6 years agoPost 1
DoodrrProfessor - Wescanson - My Posts: All  Forum  Topic

Can't find a zero degree reference point without a flybar?
This is so much easier.
Photo from Bergen RC

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01-26-2012 09:54 AM  6 years agoPost 2
hoveroops

rrApprentice

Traralgon, Australia.

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Good idea and easy to make too !

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01-26-2012 08:56 PM  6 years agoPost 3
Agilefalcon

rrKey Veteran

Fort Worth, Texas

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What rotor head is that?

Chris Berardi
Team BobbyJack's Hobbies

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01-26-2012 10:43 PM  6 years agoPost 4
4 stroke flyer

rrApprentice

Dowagiac,MI

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That looks like a Bergen rotor head.

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01-26-2012 11:00 PM  6 years agoPost 5
Sam2b

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Tacoma, WA

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This is so much easier.
But there are those who insist doing it the difficult way.

_Sam B_

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01-26-2012 11:13 PM  6 years agoPost 6
D.Magee

rrKey Veteran

kansas city mo.

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What did you make it out of?

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01-26-2012 11:24 PM  6 years agoPost 7
Dood

rrProfessor

Wescanson

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I didn't make it. It comes with the Bergen helicopter kit.
All it is is a G10 strip about 3/4" wide with a hole in the middle.

It's easy and should work with any rotor head with a hole for a head button. Even if it's not square on the top, I suspect it would work as it should level itself when you tighten the screw.

Yes, the rotor head is of a Bergen. The picture was taken directly from Bergen's website. I don't know who's idea it was to first do this, but it just works. It couldn't be faster or simpler. No need to calibrate anything!

I see a device from rdlohr.com that does the same thing
http://rdlohr.com/products.pdf

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01-27-2012 01:30 AM  6 years agoPost 8
DougV

rrVeteran

Miramar, Florida - USA (Ft. Lauderdale)

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This one comes with the Align FBL head.

Doug.

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01-27-2012 03:15 AM  6 years agoPost 9
wifeorheli

rrElite Veteran

reno, nevada usa

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i used to fold the blades back it worked dead on till my servos developed slop then that method was wayyy off. Nice job DOOD

Novarossi Motors U.S.A
www.PLanethobby.com
Team GrandRc.com
Team Byron Fuels
ZRC U.S.A. "PushGlo, SwitchGlo"

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01-30-2012 10:15 AM  6 years agoPost 10
OICU812

rrMaster

Edson, Alberta, Canada

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Simply putting your hexdriver in the blade grip hole and making it parallel with main shaft also finds zero @ zero cost

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

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01-30-2012 11:04 AM  6 years agoPost 11
Dood

rrProfessor

Wescanson

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Simply putting your hexdriver in the blade grip hole and making it parallel with main shaft also finds zero @ zero cost
Yep -- Been doing a little of that since 2007. I don't take credit for the idea but I think I helped popularize the idea. It works to find 0° but that's it. I've only used that on new builds, and since doing it, have had to make only very few blade tracking adjustments.
The screwdrivers don't tell you anything about maximum or minimum values.

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01-30-2012 02:59 PM  6 years agoPost 12
psych-lick

rrKey Veteran

Portland, OR

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lay a hex driver on each blade grip and eyeball them to one-another. If they are parallel, it's 0 degrees! quick, simple and can be done with the blades on or off.

-Jeff T.

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01-30-2012 03:49 PM  6 years agoPost 13
rexxigpilot

rrProfessor

Florida

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Electronic pitch gauge is just a gadget. You don't need one for sure, but who doesn't like gadgets? Actually, with FBL the best way I found is to get one blade grip at zero while at mid stick using a standard pitch gauge or hex driver through bolt hole and eyeballing an appropriate known horizontal or vertical reference like a window, door frame, main shaft etc. Next, lay the heli on its side, fold the blades over (pointing down) until the tips almost touch then adjust the other blade's grip link until the blade tips are at the exact same position/touching. That will give exact 0° on both blades. I have not had to adjust links after building a heli in the last 5 or 6 builds since I started doing this.

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01-30-2012 03:54 PM  6 years agoPost 14
rexxigpilot

rrProfessor

Florida

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One additional thing to add, many manufacturers are adding 0° marks on the blades grips and head blocks now - Goblin and Furion 6 are just two examples. They all should do this. TT has been adding link/bell crank locking holes to makes sure everything lines up and provides 0° at mid-stick. We should not need special devices to find 0°.

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01-30-2012 11:40 PM  6 years agoPost 15
JasonJ

rrKey Veteran

North Idaho

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Simply putting your hexdriver in the blade grip hole and making it parallel with main shaft also finds zero @ zero cost
When I was setting up my Beastx and got to the 6 degree thing I had to get creative. I have never owned a pitch gauge since I always just use the hex driver through the blade grip bolt hole parallel with main shaft thing method of setting things up. I realized that I could do the same thing with the 6 degrees. I cut a 6 degree wedge, placed it against the hex driver that was through the blade grip bolt hole and moved the stick until the other edge of the 6 degree wedge was parallel with the mainshaft. 6 degrees accomplished. I am thinking of making something more robust but it's not like I am setting up Beastx's all day long.

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01-30-2012 11:57 PM  6 years agoPost 16
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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i like how everyone develops their own method for doing this. they all work; some easier; some quicker; some cheaper than others.

smart phones are fairly ubiquitous these days, so making a digital pitch gauge should be free for most. here's what i did several years ago...still works better than anything else i've tried:

first: fab up a mount to put your phone on a standard, typical pitch gauge...i used the blue/yellow align gauge.

then:

1- fold your mains tip to tip. zero is where the blades are tip to tip

2- put on the pitch gauge and calibrate it to 0° at the known zero from step 1

there is no step 3. whatever the phone reads is your pitch.

if it ain't broke, break it.

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01-31-2012 05:47 AM  6 years agoPost 17
Mike Fortin

rrElite Veteran

USA

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Love my digi pitch gauge, doesn't get simpler.

Have Rotors, Will Fly!

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01-31-2012 06:25 AM  6 years agoPost 18
AaronJohnson

rrElite Veteran

mason,MI

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I just eye-ball 0 pitch. Since you still need to check tracking and pitches for equal climb rate both upright and inverted on test flight.....I have found that I can get them dead on or very close just by eye balling the blades.

The rest like total collective and cyclic rates I end up changing anyways after I test so I don't usually care what the number actually is. Once in awhile someone asks what I'm running and then I check it just for sh!ts and grins. Lol

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