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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Cyclic (not collective) Pitch Range
 
 
Gregor99
Key Veteran
Location: Western Wa

When discussing pitch range, we usally focus on collective pitch. Typical is +10 to -10 for Esky helis. +13 to -13 for the higher performing 450 class helis. However, I rarely see cyclic pitch range discussed. Last time I setup the heli I went with +6 to -6.

With this setting, there is no binding even when combined with full collective. With the new metal head and larger pinion, I wanted a more forgiving setup until I got used to it. However, after switching to pinching, it felt like I wasn't getting enough response out of the sticks. To get a little better response, I bumped up the swash mix on AILE and ELEV so I'm now at +10 to -10 on the cyclic. Now it feels much better. With this much travel in the head, I do get a bit of binding bit only when the sticks are at the corners. I can't imagine ever getting to the corners with the sticks while in the air.

Also I know when combined with the collective pitch my potential range is now +20 to -20, but only for 1/4 of the rotor's rotation. Although with the kind of flying I'm doing, I don't come anywhere near using all of it. I do like the way the heli feels and while I'm thinking I might have gone too far, I don't want to give up any responsiveness. I'm considering backing off the cyclic pitch just a bit then adding in some negative EXPO.

What is your cyclic pitch range?

Every Flight has a purpose - Don't miss it
05-11-2008 12:58 AM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

my king has been +9/-9 since day 1 thats just what the servo horns pushed. like you said greggor without binding. I hate to give the little booger up that taught me so much. One of the first kings shipped from HK before they hit local shelves. Never more than a broke blades spindles original main shaft even. But with 10T on the 3800hdx metal head no expo the king is hot at +/- 9 degree. Oh but yes I am flying 13 degree+/- on the rex with no expo that is just freakin scary!!!!

Love that King like a family member hell even the dog was starting to like it.


Council Member #69A3 If your not having a blast your doing it WRONG!
05-11-2008 01:08 AM
HOMEPAGE  
 
 
Gregor99
Key Veteran
Location: Western Wa

What's the cyclic (not collective) pitch range on your Trex?

Every Flight has a purpose - Don't miss it
05-11-2008 01:28 AM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

OOOPS I cant read no wonder the question was so easy to answer.

I would have to measure hold on Ill check but I usually make the swash tilt till it binds then back off one servo horn.

Council Member #69A3 If your not having a blast your doing it WRONG!
05-11-2008 01:44 AM
HOMEPAGE  
 
 
tryan02
rrProfessor
Location: Canton, Missouri

I had trouble measuring cyclic I am asuming the easiest way to do it is measure the flybar paddles? I was getting confused with the collective against cyclic. I am not sure what I am doing Wrong right now. If I measure the paddles parallel to the boom the paddles are off the scale So that cant be right or can it paddles get more pitch than blades? anyway blades parallel to the boom I am getting 8 degrees one way 5 the other so I need to think about whats going on and what Im doing wrong.

Council Member #69A3 If your not having a blast your doing it WRONG!
05-11-2008 03:55 AM
HOMEPAGE  
 
 
Gregor99
Key Veteran
Location: Western Wa

Yes, its kind of tricky. Here's how I do it. First set the collective to mid-stick (assumes throttle hold, or disconnected motor).

The Pitch gauge goes on the blades and is measured against the flybar just like always. Apply full cyclic pitch. Note that the postion on the rotor where the pitch is applied is 90 degrees counter clockwise from where the right stick is. This takes some work to get figure exactly where the pitch is at max. I end up rotating the rotor a little to see where the blade pitch starts increasing (this is point A). Continue on until the pitch reaches zero again(this is point B). Take the measurement between points A and B. Swash mix on AILE and ELEV raises or lowers the cyclic pitch. Also note on the opposite side of the rotor the blade will be doing the same thing in reverse (negative pitch).

Every Flight has a purpose - Don't miss it
05-11-2008 04:31 AM
 
 
TJinGuy
Key Veteran
Location: Socorro, NM - USA

Well I got curious so I measured my pitches. First off I never adjusted the radio so I still have the ELE and AIL settings in the radio set to 50% (or -50%). I measure +-7* for elevation and +-8* for aileron. That might explain why left/right movement is faster than forward/back. Maybe I will increase it a bit and see how that does.

- Chris

Variety+spice+life=King2+MiniT+Rex450
TAKE OFF AND LANDING CHAMPION SUPREME
05-11-2008 05:02 AM
 
 
shizack
Veteran
Location: Augusta, GA USA

In the He-who-flies-without-fins videos, he mentions cyclic pitch. Generally, he says, 6º is nice and docile for sport flying and mild aero, and 8º - 9º is good for hard action and 3D.

Tryan stopped whining so I've gotta come up with something new...
05-11-2008 08:12 AM
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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Cyclic (not collective) Pitch Range
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