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HomeAircraftHelicopterHelicopter Main Discussion › Pitch gauge tool question
04-10-2010 01:17 PM  8 years agoPost 1
Bouchah

rrKey Veteran

Willow Spring, N. Carolina USA

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Does this type of pitch gauge platform work on all types of blades? Is there any reason why this would not work on a certain types of blades? Symmetrical, non symmetrical? Is using this type of pitch platform any more or less accurate than using the type that connects to the actual blades. Im thinking of making a set of these but wondering how good they work before I go ahead with the project.

I posted this question last night in the tools and field equipment section where this tool is mentioned. I thought I may get more responses in the general discussion section.

Thanks

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04-10-2010 01:34 PM  8 years agoPost 2
z11355

rrMaster

New England

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ultimately, what you care about is the angle formed by the flybar and the blades. it's the flybar that has to be level and perpendicular to the mainshaft. Then sight the edge of the iPhone or the steel rods to the flybar.

I'll still use my Vario gauge

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04-10-2010 01:42 PM  8 years agoPost 3
Dilbeck

rrElite Veteran

Springdale Arkansas

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Nifty tool, Now you can spin it around to the 9 o'clock, 12 and 3 o'clock positions to see if your swash is level.

Clint

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04-10-2010 02:03 PM  8 years agoPost 4
Bouchah

rrKey Veteran

Willow Spring, N. Carolina USA

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So it is not necessary to hook to the actual blades?

I dont have an iphone or ipod, this is what I plan to use for the level.
http://www.harborfreight.com/cpi/ct...temnumber=95998

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04-10-2010 02:06 PM  8 years agoPost 5
z11355

rrMaster

New England

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by the time you're done w/ that and buying the helipitch, you're already $70+ in the hole. IMO you could do a pitch gauge for less. You'll also want some sort of commercial or home-made flybar lock

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04-10-2010 02:13 PM  8 years agoPost 6
Bouchah

rrKey Veteran

Willow Spring, N. Carolina USA

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Im not buying the helipitch, I am going to make one that fits my Shuttle, SDX and Freya grips, so really im only in it for about $30.
I thought I read that theirs was for 450 size birds. I dont think it will go as big as a 90 anyhow. Plus I like to make this kind of stuff, I just like it to be useful when Im done. That is why I am asking if it is a good idea before i spend the time on it.

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04-10-2010 02:56 PM  8 years agoPost 7
ShuRugal

rrKey Veteran

Killeen, TX

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the problem with using a level to zero pitch is that it requires the mast to be perfectly perpendicular to the ground. If your heli does not sit perfectly level on the skids, with the mast perfectly perpendicular to the plane of the skids, on a perfectly level table, then setting the blades level to the ground means building a drift in whichever direction the heli is not level.

Just use a pitch gauge, by the time you get done either perfectly leveling the whole helicopter, or zeroing your level to the un-level heli, you could have set your pitch twice over with the gauge.

AMA 700159

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04-10-2010 05:38 PM  8 years agoPost 8
Dr.Ben

rrMaster

Richmond, VA, USA

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I agree.

While potentially having the most sensitivity to error in the level-ness of the swash, the bubble level system is also the most capable of introducing extraneous error into the system. Ron Lund'd little lock is ideal for this. A pitch gauge locked to 0 degrees on a blade and read from all four directions with the flybar locked will do a good job of confirming if the swashplate is indeed level.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-10-2010 05:41 PM  8 years agoPost 9
Peefor

rrVeteran

Norfolk UK

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Bouchah
That's a very exotic well-machined piece of equipment. The idea is the same as mine, but mine is much simpler. The small helis use a piece of GRP and the larger ones a piece of MDF. Both have a couple of metal slugs to attract the magnets in the base of the Wixey.

Theoretically none-symetrical blades will not be at exact horizontal but both blades will be the same, so you might have to slightly adjust one way or the other. With symetrical blades it does not matter of course.

The comments about having the main-shaft exactly perpendicular are important and the gadget for that is shown in my gallery with the flybar lock.

Pete

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