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C2 - GENERAL
do I use a pitch gauge ?
gauge is probably the single most important tool used when setting
up a helicopter to fly correctly. It is quite a simple device
that lets you slip it over a main rotor blade through a spring
access in the middle of the pitch selection arm.
only slip it over the end of the blade, do not push it too far down
that you have just completed the full mechanical setup of your
helicopter, and are now going to check that the pitch range is zero
at 50% pitch range. Slide the pitch gauge over one blade end,
and set the pitch pointer to 0 degrees. Turn the blades so
that the main blades are directly ACROSS the helicopter, and then
make sure that you only check the level with the flybar also
Now bring your
eye down level with the blade, and look at the top of the pitch
gauge. It has a flat top surface that "should" be exactly
in line with the horizontal flybar. If not, you need to adjust the
blade angle using the relevant adjusting rod to bring it to the
required zero degrees of pitch.
process is used when setting up the "flying" pitch range,
except you move the pointer to what number of positive or negative
degrees of pitch you want for a certain Throttle/Pitch stick
setting, and then adjust the pitch curve in your radio until the top
of the pitch gauge is again level with the horizontal flybar with
the stick at the position you are setting.
only actually measure 3 points with a 5 point radio. these are 0%
throttle, 50% throttle and 100% throttle. A typical set of these
measurements would be -4, +4, +9. Then you just adjust the
intermediate settings to fill the curve in, so -4, 0, +4, +7, +9
would be a reasonable hover training pitch range.
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