Blade Pitch Gauge

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What They Are and What They Are Used For:

A blade pitch gauge is used to measure the pitch or angle of attack of the blades.

 

How to use them:

Adjust the pitch gauge to the desired measuring angle (eg 0 degrees, 9 degrees etc).  Slide them over the blades then use the pitch gauge’s clamp to grab the blade.

 

IMPORTANT:  Be careful that the pitch gauge is exactly perpendicular to the blade when viewed from above.  If off at an angle, the reading will be false.

 

IMPORTANT:  Make sure the fly bar is level.  If it is not level, due to the mixing arms the rate of change of the angle of the fly bar will change at a different rate to the blades – so inaccurate results will occur.

 

View along the edge of the pitch gauge to the fly bar.  If they don’t line up exactly, adjust the linkage rods/tx settings till they do.  Now do the other blade and repeat till they are consistent.

 

For more detail, refer to the links below:

 

http://www.heliguy.com/Forum/how-to-use-a-pitch-gauge-t2312.html

http://www.helitown.com/PitchGuage.html

http://www.raptortechnique.com/pitchgauge.htm