+-12 Pitch, Is it possible?

[vicrc]

Is it possible to achieve +12 and -12 pitch on the head assembly? At the moment I can get +-10 and even with that setting my swashplate will wave (wobble) as the blades rotate with full Ail and Elev control, or do I have too much elevator and aileron mixed in?

[worldofmaya]

Hi!
Rebuild my head based on Bobs recommendations and I fly with 11°. I tried 13° and 14° to get some data for my logger. Worked without a problem. The swash guide is a limiting factor. But the rebuild is really needed...
-klaus

[vicrc]

Did you check after rebuild with maximum pitch and collective input that the head spins freely. When I apply max control ,even at +-10 degree setting, I spin the head and the swash plate just wibble wobble and it puts major stress on the servos, which I think is not good at all.

[clayboy]

i have 12 -+ on collective and 8 on cyclic. no binding

[MartinS819]

i have 12 -+ on collective and 8 on cyclic. no binding

I have the same right now too! But my washout arms are ground a bit to allow for the throw. Works great though and autos nice!

BTW Klaus, the head was made to be setup with an angle on the mixing arms, not level with the grips, check out the Avant head setup and you'll see that it should be that way! The mixing arms should be at a 90 degree angle with the long linkage to the swash.

[worldofmaya]

Hi!
No problem here... no binding or whatever!

@MartinS819: I read the avant manual and I'm aware of this. But I don't think that it causes a problem and of course there's a second side where you won't get 90° if you have it on the longer side. Another thing an other pilot here had was a broken linkage (the shorter fixed one). I don't like the fixed plastic Gaui linkage...
-klaus

[vicrc]

So you can take your transmitter put max positive up collective and make maximum right aileron and maximum forward stick and then spin the blades and see if your swash is wobbling?

Please try and see if it wobbles on your Gaui.

[worldofmaya]

Yes... no "wobbling" here... but I had to rebuild it. There where a few issues before with factory assembled head. Would have been okay for a +-10 degree setup... otherwise work your way through the head setup.
I don't take my tx and set max... I've set my pitch curves linear from -100 to +100. Than go to middle stick and see what you get... should be 0°. If not, rework your head manually... there are people going the easy way by simply setting this through pitch curve but you lose resolution...
Anyway, than go to your swash mix menu in your TX and set a value for pitch. Move your pitch/throttle stick to max and take your pitch gauge and check what you get. If this is not enough than add a little bit... move stick to lowest point and check again. Should be your negative value (same as maximum). Than you have a nice symmetrical setup.
Some people fly with hover pitch at middle stick... I don't like that... take a sim and nearly all will be set-up for symmetrical pitch values...haven't used one with different set-up.
I'm using 1,5kW Motor here and 11° with 530mm SAB blades is really fast... that's what I'm using for everyday flights...
-klaus

[vicrc]

Mine is set exactly 0 degree at 50 percent input, +10 degree positive at full up collective and -10 degree negative at full down.

How do I check the degree in pitch?

[MartinS819]

Do you mean measuring your cyclic pitch? If so center throttle and set blades perpendicular to the heli. This is for measuring your elevator pitch. Next move your elevator full pos/neg and measure the pitch. For roll cyclic, just turn the blades parallel to the heli and measure the same way. Remember you need 0 degrees at center, so if it's not then something's not level. I have +-8 degrees of cyclic and the heli does fine, no binding.

[vicrc]

Martin, I did as you say and I get +-8 as well. I only notice it on this heli, I have Trex 500 and the swash don't wobble, however on the Hurricane when I take my right control stick to top right corner and have the left control up max up or down and spin the head and the swash plate wobbles. It puts stress on the servos.

I have +-10 collective and +-8 cyclic. Do you have the full CNC head? I only upgraded the CNC grips, yoke and flybar cage.

[MartinS819]

No my heads mostly plastic with just a metal flybar cage. I forgot to mention that my washout arms are ground down to accomodate the higher swash angles. That's probably why I have no binding. But...as in Finless's vids, when are you gonna have full positive and be all the way in the corner, unless you do the crazy mad 3D stuff, but you'll most likely never be in that position. If you want to be safe, you can grind a bit off the arm just like Bob said.

[vicrc]

Thanks Martin,

I will give that a shot on the grinding part. I just don't want it to load the servos more than it needs to.