Idle Up Throttle and Pitch Curve

[lperagallo]

OK, I've finally progressed enough to start flying with Idle up. Heli is an EB running 710s with correct gearing. Current pitch curve is +9, 0, -5. Normal throttle curve is 22,37,43,46,90.5 on a Hanson G26.

First question. Should the pitch curve go to +9,0,-9 to be more linear?

Second question. Should the throttle curve be 90.5, 46, 43, 46, 90.5?

If not, I'm open to suggestions. Also, what might I be concerned with the first time I fly with the new pitch curve. While I'm growing fond of checking my pants after flying, knowing what one might expect is better. :lol:

[Bobs]

Firstly, when you mention your "current pitch curve" I think you mean it's -5 0 +9. I have mine set at -4 0 10 and I think that's just a matter of personal preference. Let me mention that my set up is a little different than yours: I'm running a stock G26 with a standard boom (not an EB) and 720mm blades. I'm hovering at 1650 in normal mode and Idle up is 1800 RPMs with a pitch curve of -10 0 10. If you have the RPMs where you want them then your normal throttle curve looks good. As for the Idle up pitch curve, -9 0 +9 will work fine. In Idle up you want your throttle curve to resemble a "V" curve or "U" curve. For simplicity sake, I would set both the top and bottom numbers to 100 and use your number "43" for the middle, or maybe a little lower. My middle throttle curve number in normal mode is 31. Then I would let your transmitter select points two and four to give you the "V" curve. These numbers should at least get you started. When you switch from normal mode to Idle up the only difference should be an increase in RPMs, say from 1450 in normal mode to something like 1750 - 1800 in Idle up, and the heli will be more responsive due to the increase in RPMs. A tachometer is very helpful in determining your RPMs and setting your throttle curves. Setting the pitch curves should be pretty straight forward using a pitch gauge. Hope this helps.

[cbergen]

difference should be an increase in RPMs, say from 1450 in normal mode to something like 1750 - 1800 in Idle up

Sorry, correction.

Still one problem though, running standard gearing and 710's-720's, you should NOT be hovering at 1450. Always keep the engine RPM up by hovering at 1650, going to 1700-1800 in idle up.

[lperagallo]

Thanks Bobs and Chris. I have been running 1650 in normal. This has been verified with a tach. I guess I'll shoot for 1750 with a pitch curve of -9, 0, +9.

That's of course after the rebuild :arggg: