Hi Cincigyroflier,
Gotcha, and sounds like you are doing well. Will add a bit.
You say weight is 67 oz.
If you did the math you would find a 50" diameter rotor will
provide about a 5 oz/sq ft disc loading which is a useable amount.
There are two rotor angles that must be set.
First is the blade-wing angle of incidence. This angle relates to
the rotors plane of rotation.
If your blade-wing airfoil is flat bottom and you set the flat bottom at minus 2 deg (on blade hanger) to the plane of rotation
the true incidence will be about minus 1 deg which should provide
excellent rotor operation in all respects
The second angle is the rotor angle of attack to the airstream.
The airstream is also the craft's line of flight.
Assuming you expect the craft to cruise in a level attitude, the
fuselage would appear paralell to the horizon?
The bottom of the fuselage, viewed from side, represents level
flight? Use that as reference in setting rotor angle of attack.
You now have 8 deg to the wing saddle? Disregard the saddle!
Know this> this angle of attack can be from 2 deg to 10 deg to
the line of flight (airstream).
Also that rotor drag is an important consideration.
And that drag increases as quadruple function with each added
degree of angle.
The rotor must have an angle of attack to function.
Thus the angle used is a compromise.
The angle must be sufficent for the rotor to work,
It also must be such that the least possible amount of drag is
created.
The craft's drag requires power to overcome it. Thus the least drag the more efficent is the craft.
Gyro rotor drag is created in a "bad place", high above all else.
Thus the minimum amount is best.
Bottom line is> experience has shown that a rotor angle of attack from 2 deg+ to 5 deg+ works fine
A .36 engine swinging a 11x5 prop with a 3 1/4 lb craft weight
should fly briskly with a 5 deg+ rotor angle of attack.
Otherwise a 6 deg hang angle is normal
Ideal angle is determined in flight.
If craft is pitch sensative, increase angle.
If craft seems ultra pitch stable, decrease hang angle.
To perform Gyro maneuvers well pitch stability should be close
to sensative.
Boy, this message grew!! But, saw you were a bit off base and
we all do want you to have success !
Good luck!
Hal deBolt
[email protected]