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Slowpoke

Veteran

Dublin, OH

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I purchased a TRex 600 which I think is the older "E" model. It flies good, but I would like to replace the head mechanism with the DFC assembly to be consistent with all my other helis.

I just do mild sport flying, no 3d. I like the low parts count and compactness of the DFC.

I found a couple of old posts here on RR stating that the DFC main shaft won't fit the E model as it is too short.

Could someone please verify which model I have, and what would be the best headsetup for this heli? I would like to use Align parts.

Thanks,

Slowpoke

08-27-2016 06:38 AM
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Brokenlink

Elite Veteran

Oakdale,Ca.

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If you want a lower parts count than the one you have pictured it is going to be tough to fly

Anyone can land, then stop. It takes someone special to stop, then land

08-27-2016 11:51 AM
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getsuyoubi

Heliman

Queens, NY - USA

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Looks like a 600CF to me, converted to flybarless and direct-to-swash instead of using bell cranks, the bearings for which can still be seen in the frames. Since the tail servo is mounted on the boom I guess it has a belt driven tail rotor, while the 600ESP has a torque tube.
I don't have experince with DFC heads, but they are supposedly even harder on servo gears than regular FBL heads in the event of a crash.

08-27-2016 06:48 PM
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Slowpoke

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Dublin, OH

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getsuyoubi,

Thanks for the reply. I'm going to see if i can find a later model airframe for sale and just transfer all my electronics to it.

08-28-2016 02:28 AM
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getsuyoubi

Heliman

Queens, NY - USA

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For mild sport flying it's certainly up to the task. If I were you I would just fly it the way it is, instead of spending extra money. But that's just me...

08-28-2016 09:18 PM
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FNFAL

Heliman

Dayton OH

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That's really the first version of the Align 600E. I had one, which you can still see the old listing here:

http://www.rcgroups.com/forums/showthread.php?t=969120

Indeed, someone removed the bellcranks from the ailerons which you can see still incorporated in my listing pics. I updated that bird to a TT also among other things. The similar 600ESP came later, and comes without a third main bearing, but most ESP parts should work with your model.
Agreed, best to leave as is or go to a new airframe...but it wasn't a bad bird. It was robust and easy to work on. And flew well considering most were 6S.

08-30-2016 02:19 PM
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Slowpoke

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Dublin, OH

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FNFAL,

Thanks for the link, yes, mine is exactly the same. I didn't know that it originally came with belt drive.

Mine flies good the way it is, and on 6S, so I guess until way in the future when my flying abilities outgrow it, I'll leave it the way it is.

Thanks,

Slowpoke

08-30-2016 10:54 PM
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FNFAL

Heliman

Dayton OH

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Welcome. If you are going to keep if for awhile, it might be worth looking into restoring the bellcrank system in her. I'm sure you can find a parts list/ manual online still. I would keep the head you have, and then re-setup the who FBL and head geometry. Your pics don't show perpendicular servo arms with horizontal swash driver with zero pitch blade grips. Also check the phasing of that stand-alone swash driver. That pitch link should be more or less vertical when viewed from the side.

See my 550, a close cousin to your 600 with the head in "null" position.

I really did not like the DFC from a mechanical standpoint - if flew fine however. It had too much "tennis racket" affect and it would pop and lock at extreme stick corners. There are shorter main shafts, but I don't think any that work with your 3 bearing main. That shaft is tall and you would have to position the swash way up high on the dfc and have super long swash links. It would look weird IMHO and the geometry would be odd.

Sure you could spend a ton of money trying to go to a two bearing, different shaft, hit and miss, mix or match, etc. etc., but that would be a waste money and time. Just my $.02

Cheers

09-01-2016 02:14 PM
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Slowpoke

Veteran

Dublin, OH

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FNFAL,

When I am at mid stick, the linkage is 90 degrees to the servo arms. I rechecked the swash arms and made a small adjustment so they are level at mid stick.

I still have the bellcranks, i removed them for a more simple setup. I didn't notice any change in how it flies, but liked the lower parts count and less complexity. Could you explain the purpose of the bellcranks? This is the only heli I've ever had that used them.

I understand that a lot of pilots do not like the DFC setup. At my level of flying, just circuits and an occasional flip, I don't think the DFC setup would be detrimental to me, but all my other helis - 450, 500 and 800, have a DFC head and I thought it would be advantageous to have the same setup on all of my helis.

I haven't been able to find a manual yet, I've searched on "600E" but all I've found so far is the newer 600E with the shorter frame and 12s setup.

Thanks for all of your advice, I guess I'll just keep it as is.

Slowpoke

09-03-2016 06:52 AM
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getsuyoubi

Heliman

Queens, NY - USA

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Google for "Align 600CF manual" - I believe that's what you need. I'm essentially in the same situation as you; I bought a used "mystery TREX 600" last year and looked around for a manual, and the 600CF seems to be the one I have. If you can't find that manual shoot me a PM with your email. I'll send you a pdf then.
How wide are your frames? I have the narrow ones, 45mm or so (can't measure right now as I'm on travel).
I'm also considering removing the bellcranks.The reason is that eventually this machine will end up in fuselage, and the elevator servo sticks out pretty far. Removing the bellcranks seens to be the only way to allow mounting that servo from the inside. Just by looking at my geometry my linkages should end up pretty much vertical.

09-03-2016 07:17 AM
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Slowpoke

Veteran

Dublin, OH

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I found a manual for the 600CF, and it looks like it is the same - Thanks!

The inside measurement of my frames is a little over 47mm - 1.86"

Slowpoke

09-05-2016 04:00 AM
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FNFAL

Heliman

Dayton OH

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Awesome. Back in the early days align used to designate gf or cf in models, so it makes sense. It was based on frame material type. As for the Bell cranks, they just help with geometry. Not as important as it used to be in the old flybar days. But can still help.

09-05-2016 03:41 PM
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