Pitch / Throttle Curve How-To?

[bsumpter]

Hey everyone!

I just acquired a Concept 30SR used, and have a quick question about pitch / throttle curves.

I've already flown this bird, and it flies really nice, but I have noticed at certain collective levels the engine appears to be overspeeding. How does one go about setting up the proper pitch / throttle curves on a heli? Do you go by engine sound and just tweak until the load sounds consistent? Would anyone care to walk me through the process?

Also, if anyone is flying a Concept 30SR w/ an OS 32 engine, would you mind sharing your current pitch / throttle curve settings? This would at least give me a base to start with.

My radio is a Futaba 9C, and it is currently running the default curves (0,25,50,75,100) on both throttle and pitch.

Any and all help will be appreciated.

Thanks!

[dru]

I will try to tell you how I set up my Nexus. I do not know anything about yur radio so I can not help out there.

First thing is to find a pilot in your area to help you. If there is no one around trial and error is all you have.

What tools do you have? To set up the main rotor pitch curve you need a pitch guage.

I start at the top and work down and I hover at 3/4 stick so center stick is 0 degrees.


Set the top end pitch at 10-11 degrees and the throttle curve to 100%so the throttle barrel is fully open.

3/4 stick will be 5-6 degrees and 60% throttle.

1/2 stick is 0 degrees and about 20% throttle.

1/4 stick is -2 degrees and 20% throttle

low stick is -4 degrees and just a good idle.

It is help full if you have a tach to read the main rotor RPM. This is a GENERAL setting. It is just a starting point and will need to be tweaked to fit your heli. You can then copy all of the settings into other flight mode and all you have to change for the 3D flying is the throttle settings.

If you think that the it is over speeding try to reduce the thrttle settings and see what happens. Sometimes the clutch shoes break and then the motor will not disengage correctlly and it can cause it to over speed.

Hope this helps a little.

Dru.