Elevator problems?

[easypickingsere]

Dont know if anyone can help me out here. Its been a year since I had my 600 and just started getting brave enough to try all the moves I do on my 450 with it. Problem is whilest going for tic tocs I have found the heli comes back towards me fine, when punching it back away it seems to take forever.

Looking at the swash I can see there is more back elevator than front. Everything seems to be just about spot on, swash level at midstick, bellcranks all 90 and blade pitch at 0 midstick.

At present its set up on my DX6i and elev is set at 80% as is airleron. Pit and thr set to 100%. Is there anyway I can get the swash to travel the same distance on elev or have I buggered somthing else up?

Tempted now as I have noticed a problem to start a fresh and set up on my DX7 just would like to sort it on 6i first to be sure Its mechanicly correct.

Any pointers will be much appreciated

Cheers

Mark

[tourerjim]

Have you used pitch gauge to check plus & minus pitch to be sure your getting 10/11 degrees, assuming you used one to get zero degrees.

[machasm]

Sounds like you don't have enough negative pitch Mark or your trying to punch into a strong wind!
I would say just go for a fresh start on your dx7 and make sure you are mechanically setup correctly.
Ade.

[easypickingsere]

Ok just rechecked pitch and got +12 0 -10. Will this effect the swash moving more backwards than forwards?

[Vic.P]

Ok just rechecked pitch and got +12 0 -10. Will this effect the swash moving more backwards than forwards?

Not really, it's only controlling collective pitch, not cyclics, but if you set it up with +10 to -10 or +12 to - 12 it should give you equal response on both sides of a tick tock.
I would think about upping the elevator and aileron rates to 100% and then check the throws on the head to make sure the servos are not stalling. this should give you a sharper response all round. Also check which setting you have on the SF mixing arms, there are two holes for mounting them on the flybar seesaw holder, one for stable 3d flight and one for more agressive 3d flight, the agressive one will work better if you are doing tick tocks
Also, what power train are you using? it may be that the motor is bogging down a bit with the high pitch inputs?

[easypickingsere]

Ok got +12 and -12 but now midstick is at -1. Adjusting travel to 100% seems to of got the throws close at midstick and high stick tho still seems to be little change at low stick.

The mixing arms are set on the "agressive hole" as per 600 n video of bobs. Im using an Align 50 hyper and there is very minimal drop in revs either way, even done a straight forward rainbow to allow the headspeed to settle before punching back away.

[Vic.P]

Ok got +12 and -12 but now midstick is at -1. Adjusting travel to 100% seems to of got the throws close at midstick and high stick tho still seems to be little change at low stick.

The mixing arms are set on the "agressive hole" as per 600 n video of bobs. Im using an Align 50 hyper and there is very minimal drop in revs either way, even done a straight forward rainbow to allow the headspeed to settle before punching back away.

First, midstick value should be corrected to zero. Stick your pitch guage on, set stick at mid stick and then adjust middle curve value (3 if it's a 5 point curve) until pitch reads zero.

The elevator problem.......it's looking like it's a setting in the DX6i that's causing the problem, have you checked the Travel adjust settings for elevator? Make sure the values are equal for both throws.

[easypickingsere]

As far as I know it adjusts eqaul amounts on the DX6i? I have looked on the monitor and seems to be equal in the throws.

Have taken some pics and not sure but think the swash maybe a tiny amount high on the front?

Ill stick them on in the hope someone can spot what my tired eyes are missing.

[Eckchaz]

Have you got a Swash leveller tool?

I find it an invaluable tool to get the swash right at both extremes.. Just because the swash is level at mid stick, does not mean the full +/- throw will have a level swash at the servo/arms do not always throw the same amount.

[easypickingsere]

Never had one always gone by eye. I got an old level which I retired a while ago, may cut one of the bubbles out and try that. Think Im going to take Ades advice and just start a fresh on the DX7 and start a fresh all over using your suggestions so far.

Thanks for the help thus far will no doubt be back on for more help as the 7 is still all new to me.

Cheers

Mark

[Vic.P]

Looking at your first pic it looks like the link near the anti-rotation bracket needs shortening by a 1/2 to 1 turn to level the swash. Might make a slight difference.

A bubble level won't help you much unless you first get the frame top or main shaft leveled in all directions. A swash leveling tool would be best but if you have a pair of calipers to transfer the swash to frame measure at 4 points then that would be a bit better than doing it by eye.
Otherwise, all the other levers look to be pretty good for parallel etc.

[Eckchaz]

Get a leveller Mark before you start setting it up on the DX7, Fast Lad Performance I find these better than the bubble ones but each to their own! And the 7's not as daunting as you may think