pitch gauge/blade angles?

[ch47dfe]

I just purchaced a pitch gauge to check blade angles on my cp pro. my question is how do you set it up to measure the blades? Do you measure the blades when they are in line with the airframe or do the blades have to be 90 degrees to the airframe? what about the flybar? Do you sight along the top of the pitch gauge to line up the flybar? Any help would be greatly appreciated, thanks. :dontknow

[carlo_the_wonder_frog]

Make sure everything is level first, swash, flybar etc. Then just line up the flybar so it is exactly level with the top of the pitch gauge, you should be able to read the pitch then.

[ch47dfe]

Should I be reading the gauge 90 degrees to the tailboom?

[orlbuzz]

ch47dfe,

If your swashplate is level all the way around, as CarlTWF said, it doesn't matter where you check pitch. If you are using it to compare the two rotor blades, it is probably a good idea to use the same spot. A good way to check to see if your swash is level is to take readings at 0, 90, 180, and 270 degrees. The pitch should be the same at all points. It would take me too many words to describe how to use the pitch gauge to adjust the swash.

With any use of the pitch gauge, you should have swashplate level and aileron and elevation at 0 degrees. (Unless you have a computer radio and want to set elevator and aileron travel.) If you just want to set the pitch, with motors unplugged, at center stick (throttle/collective) at midpoint in idle up, adjust pitch to 0 degrees. Or, if you don't want the default normal mode setting, put it in normal mode, with throttle/collective at low stick, motors unplugged, set the pitch where you desire.

As you progress, you can use your pitch gauge to set up throttle curves when you use a computer radio.

[Skiddz]

Measure at any point in the main's rotation for collective. Like olrbuzz said, if everything is level, both blades should show the same amount of pitch at any location around the main shaft.

To measure cyclic pitch, set the mains at 0 degrees collective pitch then measure as follows:

Elevator Forward: Blades perpendicular to frame, measure right blade
Elevator Back: Blades perpendicular, measure left blade
Left Aileron: Blades parallel to frame, measure forward blade
Right aileron: Blades parallel to frame, measure rear blade.

[ch47dfe]

Thanks for the tips-I used the gauge 90 degrees from the airframe, locked the flybar level with two toothpicks and found that I had way too much pitch in the blades from the last rebuild session. I adjusted the pitch to -2 degrees with the collective down, +5 degrees with the stick at midpoint and +12 degrees with the stick at full up. I also re adjusted the swashplate to perfect level (as best I could) basdes on the info from BladeCPrepair.com. The
thing lifts off the ground level and smooth now.

[Pinecone]

Check the Finless videos on CCPM setup. They are for a Trex, but the setup is basically the same.