600 v2 problem

[thomas_600le]

I have a problem with the new v2 kit. I notice the kit has come with a flybarless main shaft and the new gear setup? This seems to be giving a big problem with the head setup.

I have set everything as per manual and all servos are at 90 degrees along with everything else through the head. However I have a major binding problem at positive pitch, I mean it's bottoming out against the head block at 3/4 stick on a linear curve! my attention was quickly brought to the fbl shaft which is a good bit shorter then a fb shaft. As a check I put the head on my older 600 and it operates fine with no binding!

I thought I would just swap the fbl shaft that came with the v2 for a standard one, but in doing so the new gear setup will not fit the new shaft :S it is extremely tight, and the shaft collar bottoms out on the lip of the shaft before the bolt holes line up? I am confused about this as I though the new gear setup was supposed to replace the older style ?

Is this a genuine problem with the kit and the wrong parts supplied or am I missing something here?

[pgkevet]

The obvious questions: Does it bottom out at 3/4 -ve range. What actual pitch range do you have?

[Mslater]

Sounds to me like your short linkages at the top of the head are the wrong length.

[thomas_600le]

It does not bottom out at 3/4 -ve, the awash sits about 8 mm off the bearing block. The pitch is set at -50 in the swash mix so nothing extreme.

All links are correct and everything set up 90, I checked and double checked. Just puzzled as to why there is a fbl main shaft in a fb kit? As stated in my original post I tried it on a normal main shaft and it's perfect

[pgkevet]

I misunderstood it as you were building a flybarless kit and having problems.

I 'thought' that align were moving to the shorter mainshaft on this model anyway - although there is an implication in what you say that your kit may have been mixed up in packing.

What's important isn't the swash mix you set up but what you actually get as a pitch range on the blades. If its binding top but not bottom then usual solution is to shorten the servo to swash links to move the swash to the middle of travel at midstick..allowing for cyclic pitch ranges as well as collective top and bottom. Then zero the blades at midstick and check blade pitch top and bottom. As you know the rule is always to work from the bottom up.

You would expect to be able to manipulate the swash mix to give a total of +/-14 degs..perhaps by going to 60 or even 70% (tx and setup dependant) on the swash mix without binding. What you fly at is a matter of ability and collective management, however

[thomas_600le]

Thanks for the reply, I have worked from the bottom up a few times as a check and everytime all is ok. The pitch range at the moment is around -13 and +6 and its not going to get any better, there just isn't enough travel for the swash.

At full neg i have -13 with the swash around 6mm off the bearing block and at centre stick everything is 90 and level with 0 pitch on the blades, all this being on a linear curve. I do think this heli is not designed for the shorter shaft included.

I did try the new head on my LE and it operated perfectly and got +/- 13 easily without any binding and all I did was remove the old head and bolt this one on. I would use the LE shaft on the v2 but the gear setup supplied withe the v2 will not fit it

[Three6ty]

I have a V2 kit which is flying very nicely. Measure your main shaft and I'll measure mine. Oooh errrr missus Then we can tell if it is indeed the main shaft as mine is working fine.

[thomas_600le]

Mines 191mm what's yours , the actual manual shows the mainshaft with '600fl ' on it

[Three6ty]

Mines 192mm. So within a mm of yours. I'm guessing there's something else a miss with your setup. I'm running +-10 deg of collective. I could probably get 13-14 deg but I'd need to try it.

[Three6ty]

Just maxed it out and I can get +12 deg of collective before washout base hits the head block. Not sure if I could get more by adjusting some links, but I don't need that much anyhow.
Just as a check, probably silly but do you have your washout base on the right way up. That would affect the + pitch range loads.

[pgkevet]

[QUOTE=thomas_600le;709042***The pitch range at the moment is around -13 and +6 and its not going to get any better, there just isn't enough travel for the swash. ***[/QUOTE]

So you have 19 degs of pitch and 6mm travel spare...that would give you somewhere around the other posters 24 degs of travel. So once again my suggestion is to lower the servo to swash links and get the swash in the centre of travel and work up from there. Unless your into smack or aerobatic autos then 11 to 12 degs pitch is enough :-)

[Three6ty]

So once again my suggestion is to lower the servo to swash links and get the swash in the centre of travel and work up from there.

Trouble is on the V2 and the original LE I believe, the pitch and aileron links are adjustable but the elevator link is an A frame type and has no adjustment. Someone correct me if I'm wrong here.

A frame.jpg

[thomas_600le]

Three6ty would you mind taking some photos of your head at centre stick so I could compare?

I know what our saying about dropping the swash but wouldn't that cause the swash to bind at full neg with high aileron and elevator input? I do alot of aerobatic flying. Im also unsure as to how I would lower the elevator arm as it is fixed

[Three6ty]

I'll try and do it later, if not first thing in the morning

[Three6ty]

Some pics of it at centre stick. If you need any others like more close up or further away or at different pitches let me know.
Just snapped with the iphone 4 so if not clear enough I'll get the proper camera out.