Who uses a 'S' pitch curve.

[NoFixedAbode]

All my models run a linear pitch curve and are nice and smooth but on my 450 pro I have to run an 'S'. To compensate for the dead band around mid stick. Am I the only one?

[jimmyhorns]

Its a curious question, as most of us dont have a linear pitch curve, we run a linear pitch curve on the transmitter.

Because of the way that our servos work, there is more movement in the swash per % change of Tx around 0 degrees.

Its the same with expo on our swash servos, it was initially intended to allow for a more linear movement of a control surface with regards to stick movement.

I run a flat line 0-100 but I am well aware that this does not give me a linear pitch range on the heli.

[GIXERMAN]

Also called the Curtis curve, I use on a fly barred 600n, which makes it nice and snappy and don't have to move stick as far.

[NoFixedAbode]

Re: Who uses a 'S' pitch curve.

Now edited post. What I meant was dead band around mid stick. On my 550 and 600 it is smooth.

Btw pitch is -11, 0, -11 on all.

[rachel]

I do and for me it works very well :-)
i did post a thread on this a while back and had some interesting reply,s

it works especially well wit a TX that you can set your own points on such as a DSX11
x Rachel

[KevDavies]

How many points can you set in the Pitch curve Rachel on the dx11?? Cos thats an interesting feature as it would allow you to get a perfectly linear collective action.

[NoFixedAbode]

Re: Who uses a 'S' pitch curve.

Ok just thinking out aloud but if expo results in dead space around sticks...will a negative expo do the same as an 's'.

[KevDavies]

I would imagine it would actually.

The ultimate best solution would be a curve point for every degree. that will be perfectly linear then.

[helimadness]

Interesting I only really noticed this when I built my goblin recently and was looking at the amount the servo arms travel. Was thinking the travel amount has to be less at the extreme when the arms are so far from the 90 deg mark. With full pitch in the Goblin they are really quite extended. Being fairly much self taught with a lot of help from here it was still in my thought process. Only been flying a year so all fairly new to me.
I then saw this post on HF and realized straight away you could have a non linear curve to counteract the problem. I always feel the pitch is too sensitive around hover and when I invert I never seem to go negative enough. But maybe that is just me or the fact the pitch curve start to flatten out as the servo travel. So you have to use more stick for the same result.

Anyway here is the link on HF. Ill give it a go on the 500 on the weekend.

Share your Pit, Ele, Ale, Rud curves - HeliFreak

Cheers