That upsidedown thing ?

[Ade_Law]

If your using a governor and not competing in f3c i dont really see the need for more than 5 points. Infact just looked at the setup on the knight and I am not even using 5... Just 3 with the curve smoothing switched on.

Pitch curve might as well be 2 points.

Its the little things like ease of setup with the governor, switch assignability etc.

The 9z wc2 has 13 points. The downside is that if have to set all the points, you cant disable the points you dont want either. This is one reason I went to the 14mz over the 9z

Ade

[Dedcalm]

I run a TJ Pro so really a basic throttle curve is all that is required. However more control over the pitch curev cant be a bad thing. The 5 point curve I have with the 9CP is a huge improvement over the FF6 that I used before.
I bought Rays Authoritive DVD a couple of weeks ago and was interested by the additional features that the JR featured had. Of particular interest (due to the apparant lack on the 9CP) is the cyclic to throttle and rudder to throttle mix. I guess not really applicable with a governor but interesting never the less.

The other thing that was interesting was how Ray set up the pitch servo with ATV of 150% so the throttle servo would always be ahead of the pitch, again I doubt that this is a great issue with the governor but with a revmax it would be.
I suspect that I could make use of some of the free mixes in the 9CP to do a cyclic to throttle and rudder to throttle mix but I have not tried yet.

Rob

[Ade_Law]

it depends on what sort of flying your doing. If your a sport flier or 3d then a straight line pitch curve is the best way to go. Nice linear response through the entire collective range.

Ade

[Dedcalm]

Thats what I have at the mo, straight line curves... think I will open a new thread as I dont want to hijak this one...

Rob

[duzie]

Hi Guys,

Can you explain to me what pitch and throttle curves are. :?

Cheers Duzie.

[Dedcalm]

Pitch and throttle curves define where the relevant servo(s) are at a given stick position...
e.g. for a straight line 3D 5 point curve (Idle Up)

0% stick (i.e. bottom) = -9 degrees pitch
25% stick = -4.5 degrees
50% stick = 0 degrees
75% stick = 4.5 degrees
100% stick = 9 degrees

Silimarly for learning hovering etc where you would not want more than -2 degrees of pitch you may have an (Normal) curve such as this,

0% stick (i.e. bottom) = -2 degrees pitch
25% stick = -1 degrees
50% stick = 0 degrees
75% stick = 4.5 degrees
100% stick = 9 degrees

Note that I have kept the +ve pitch part of the curve the same as the 3D curve so there is no big jump in pitch (and thus control) if you switch between Normal and Idle Up modes.


Throttle curves are similar also but relate to the throttle and should be matched to the pitch requirements. A Normal curve would range between idle (0%) and full (90-100%)thottle where as the Idle Up curve would be a V shape such as

0% stick (i.e. bottom) = 90%
25% stick = 70% degrees
50% stick = 50% degrees
75% stick = 70% degrees
100% stick = 90% degrees

This is because when inverted you need more throttle to climb out as you add more -ve pitch, if you forgot to have this pitch curve as you added -ve pitch your engine would drop to idle and the heli would come down rapidly

Hope this helps... at least thats how I understand it...
I have a thread open in the main discussion section about Throttle hold pitch curves for Auto rotation practice....

Rob