Cannot break ground with these blade pitches

[bdelmo]

Flight Mode Low Stick Half Stick High Stick
Normal +11 degrees 0-1 degrees -8.5-9 degrees

Both Throttle curve and Pitch curve are set linear from 0 to 100.

I cannot break ground with these blade pitches. What is wrong here and how do I correct it?

[bdelmo]

Yes, the pitch is reversed here. Is this a mechanical set-up problem or electric set-up? What is the remedy?

[Dennisu]

If you are talking about a Swift then reverse the setup in the radio if the mechanical setup is proper - i.e. the swash moves up causing an increase in blade pitch. If the blade pitch decreases with the swash moving up then fix the linkages.

[bdelmo]

Yes, this blade pitch problem is a Swift.

The current mechanical setup is not proper - i.e. the swash moves up causing an decrease in blade pitch.

I will look at fixing the linkages, but need help where to start here.

[bdelmo]

Main blades going to a negative pitch when I move the stick up. The main rotor head is spinning clockwise, as expected.

Pitch curve is set linear from 0 to 100, with Spectrum DX7 settings as default for Norm (same for ST1, ST2 and hold):
Point L 0.0%
Point 1 inh - should I change to 25%?
Point 2 50.0%
Point 3 inh - should I change to 75%
Point 4 100.0%

The Century Swift is eccpm. After I reversed all of the cyclic servos (aileron, elevator, and pitch), the main blade pitch is now correct:

Flight Mode Low Stick Half Stick High Stick
Normal -8 degrees 2 degrees 12 degrees

Thus, when I increase the throttle, the swashplate lowers (previously raised) and this heli is ready to break ground.

Now, I need to figure out how to get a Futaba Gyro GY401 to work (not currently observing red light solid) to control the rudder direction (spinning now).

[frankos72]

Depending on your experience level you may not want such a dramatic range in Normal mode. Mine is set to -3, 0, +8 on Normal. I use Idel up 1 and 2 for more pitch especially in the Down pitch.

As for the futaba, you must have it in HH mode when you turn on the power to get the solid light. At the same time you have to calibrate it in Non HH mode for proper setup. 1st go fly in Non HH mode and you want to move the servo forward or backward on the boom till the tail is stable at hover. Then work on HH mode. Someone with that radio would have to tell you the details for controlling the mode in the radio.

[bdelmo]

As my swashplate moves UP, I have been told that the blades should INCREASE in pitch.

I also recognize that my pitch range is wrong for training. Back to either switching the blade grips if incorrectly installed or ?

On the Futaba Gyro GY401, I called Futaba that was not familar with DX7 (JR) settings for this gyro. No luck either at Horizon Hobby on the DX7 (JR) with Fubaba gyro. Looks like I back to trial and error for settings.

[frankos72]

What settings are avaliable in the radio as far as gyro gain are concerned? What is the max and minimum available?

If it doesn't have gyro gain settings built in, you may just have to map a dial or switch to channel 5 or whatever your gain is plugged into. I can tell you that if you have to use this option then the Gyro will work as follows:
setting between 0 and 50% will be NON HH/Rate Mode Gain ie 25=50%NON HH Gain
setting of 51 and 100 will be HH Gain ie 67 = 26% gain in HH mode.

So if you controller doesn't have an actual gyro gain control then try this and see what you get. If it does have gryo gain control, then post the possible settings and we can go from there.

[Dennisu]

bdelmo

Get your linkages set up for the proper direction of movement first and then do the setups for proper pitch values after. Check out Finless Bob's build and setup videos for the correct way to do them.

[Finless]

The manual has a mistake in it that will cause this reversal. See my vids on head setup and I point out the correction.

Bob

[bdelmo]

I will download Finless Bob's video on the head setup to help me figure this pitch correction.

Thank you! :)

[bdelmo]

Finless Bob's video on the head (build) parts 2 and 3 showed me how to fix the incorrect installation of blade grips. I also found head setup to be very helpful.

Bob, thanks again. :noteworthy