Swash setup..

[Mojo]

Hi Guys,

Just a quick bit of advice needed.. I decided (god knows why) to setup my 600 from scratch (boredom?)..

Instead of my current setup where i had the maximum mechanical setup allowing -+11 pitch, i thought i'd set it up for the full range and back it off with the swash mix to -+11 ish or so..

Problem is.. I have an A-arm and when i want to move the swash down by shortening the links (to prevent binding at the top), my swash plate does not sit level at mid stick (as i can't alter the a-arm length)..

Is it something very obvious and i'm just not seeing it (its been a long day) or is there a way of doing this..

Cheers,

Mo

[adieuk]

is it level at the top and at the bottom

[Mojo]

It was all level everywhere.. Until i decided i would up the swash mix and drop the whole swash plate down to allow full movement along the shaft without binding.. You would usually do that by shortening all 3 swash links.. However, i can't change the length of the A-arm and that would leave my swash tilted..

[PsiLo]

When you are using the A arm you can't move the swash down using the links, they have to match the A arm, you just have to use the swash mix to limit any binding or start changing your ATV's.

[Mojo]

That was how i set it up originally, matched the links to the A-arm and adjusted the ATVs.. Just wanted to have a perfect mechanical setup without having to use the ATVs.. Oh well

Cheers for the advice

[PsiLo]

I have actually ground the washout pins (1 or 2mm) on mine which enabled me to get to +/-12. Without grinding my swash was hitting the pins on full positive and cyclic. Has always kinda puzzled me that without the A Arm I can get +/-13 easily then 'upgrade' to the A arm and get reduced pitch range!

[Mojo]

I have actually ground the washout pins (1 or 2mm) on mine which enabled me to get to +/-12. Without grinding my swash was hitting the pins on full positive and cyclic. Has always kinda puzzled me that without the A Arm I can get +/-13 easily then 'upgrade' to the A arm and get reduced pitch range!

Was thinking the same thing.. I had a pro without the A-arm and there was no messing about in the setup.. I don't think i actually need anything more than -+11 at my level of flying, but better have the setup done once than having to mess about setting the head up again in the future if i wanted more pitch..

I'll see what i end up with before resorting to shortening the pins.. If its got to be done then i might as well do it now before the weather gets better while i spend my time sorting it out instead of flying it

[PsiLo]

If you do shorten the pins, make sure you check the washout is on the pins before you power on. I have seen it drop off the end and then bind up when you power on. I doubt I need the extra but hey, you can never have too much pitch

[J-S-Q]

Are you able to sand a bit off the end of the ball link on the A-arm so that you can screw it in a bit further?

[barney]

Mojo, Just a thought could part of your problem be the A arm setup. As you look through the frames from the side the top edge of the arm should be sloping slightly downwards since the arm is tapered and not parallel.

Brian

[Kwickkwack]

Re: Swash setup..

Hi Mo
I seem to remember hearing you can slightly shorten the length of the ball link on the A frame by removing it and cutting it back
Will have a look tonight at mine again


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[Mojo]

Are you able to sand a bit off the end of the ball link on the A-arm so that you can screw it in a bit further?

I haven't looked at that.. I might have to see if i can as Rob mentioned above, i think all that is needed is about 1 or 2 mm to get the desired result..

Mojo, Just a thought could part of your problem be the A arm setup. As you look through the frames from the side the top edge of the arm should be sloping slightly downwards since the arm is tapered and not parallel.

Brian

I just had a look Brian and mine is dead straight with no sloping..As it is the links match up with the servo @ 90 degrees with no subtrim needed to centre it.. It is a bit hard to look through the frame from an angle and see if the balls are perfectly aligned, but i took the alignment of the servo as an indication that all is matched up..

Cheers,

Mo