Trex 250 DFC swash linkage geometry ...??

[Razmo]

Gazor,

The Heim Joint preload spacer set is just awesome. They removed all slop from my tail grips. I have yet to test the Chinese weights, but expecting postive results.

Raz

[ThomasHumble]

Originally Posted by Razmo

Gazor,

The Heim Joint preload spacer set is just awesome. They removed all slop from my tail grips. I have yet to test the Chinese weights, but expecting postive results.

Raz

Can you post a link for what you got? I need something to take up the slop in my tail.

[Razmo]

Thomas,

You'll need to PM Heim Joint. He'll respond with a menu to choose from. You'll need the preload spacer set for the Trex 250. Addionally, you'll need to purchase a set of Align 681X bearings if you don't already own a set. It's a fantastic fix. I have no slop in my tail now.

The Chinese weights can be purchased separately. I purchased a tuned set for the weighted blade grips. Heim has a YouTube video illustrating the efficiency difference. They are pretty slick.

Raz

[mutna]

Originally Posted by Razmo

Hi Guys,

My first Align helicopter and feel rather irritated with the swash linkage. I'm at 12.5mm per the manual on all cyclic servo arms. Not only are my pitch and aileron servos out of sync during collective travel, what's the story with the elevator linkage geometry?

I figure I'll need to dial down the PIT travel in the swash menu from 60% as my aim is 12 degrees of pitch on either side of 0 pitch, but what's deal here?

I'm using an 3GX versio 3.0 in DIR mode and 415's on Cyclic...

Any help would be appreciated.

Thanks,
Raz

Hi razmo,

Did you ever get to the solution as to why you had out of sync movement on your swash????

I have the exact same problem on my pro dfc swash

[myxiplx]

I assume you mean that the wrong servos are moving with your collective? If so thats down to the FBL setup, you may have some channels that need reversing.

What FBL controller are you using? Somebody here may be able to help, or you could post in the FBL controller forum of helifreak. Someone will definitely know what it is.

[mutna]

Originally Posted by myxiplx

I assume you mean that the wrong servos are moving with your collective? If so thats down to the FBL setup, you may have some channels that need reversing.

What FBL controller are you using? Somebody here may be able to help, or you could post in the FBL controller forum of helifreak. Someone will definitely know what it is.

Hi thanks for the reply, the swash moves in the correct direction and the ar7200bx is setup prrectly, I've set it up loads and I'm quite familiar with it now, the problem lies with the pitch servo moving out of sync with aileron and elevator once I'm in the higher collective range if that makes sense, the pitch servo seems to travel than the aileron and elevator even though travel adjust is the same on the transmitter.

Any ideas guys????

[myxiplx]

That may be normal, many FBL controllers have tweaks to account for the extra drag on the tail.

I don't know BeastX, but if you've followed the setup steps and everything is moving and correcting in the proper directions then I would fly it and tune from there.

Generally speaking you can't judge FBL behaviour on the bench. Once you have finished with the setup process there are usually a lot of complex interactions going on.

[Razmo]

Hi Mutana,

Oh boy, I'm forgetting. I completed the machine and test hovered by hand, which was butter smooth. However. I have yet to fly her, she's been covered and shelved since. One too many kits, life and not enough time , but been planning to fly her soon though.

One thought, have you adjusted your end points so that you're swash is level at high stick, same for low stick versus just mid stick? It's possible the BeastX doesn't offer this adjustment. I know other FBL units do, never used the BeastX.

I built mine with a 3GX, but don't recall if it offered high and low stick end point adjustment, whether I solved this issue or if I settled with being comfortable determining whether it was a problem during flight, which I haven't done yet .. Time flies..

Raz

[pgoelz]

Originally Posted by myxiplx

That may be normal, many FBL controllers have tweaks to account for the extra drag on the tail.

Check the "Swashplate-Pitching up compensation" setting in the Parameters menu (short press of the programming button). This looks like it changes the travel amount of the elevator vs. the other two servos at pitch extremes. But best to fly it and see how it reacts in the air.

Paul

[FFXIJehuty]

anyone end up fixing this i seem to have the same problem servo 2 lags but in the middle is fine?