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HelicopterFlybarless Rotor Head SystemsAlign 3G › Align 3GX OK For My Shuttle FBL Conversion ?
02-17-2014 11:46 PM  3 years agoPost 1
icanfly

rrElite Veteran

ontario

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I got a 3gx from a larger donor heli and want to equip my Shuttle fbl conversion with a proper 3x gyro instead of 2 separate rate gyros and a tail as first entertained.

This thing is really taking shape with the TT blades. Not to do hard 3d but only sport and fc3 style flying. A few ZXX parts to remove the pull start (120gr later) and links to make it ccpm swash mixing later will make it a very cool heli indeed,

What is so wrong with the 3gx that makes it undesirable compared to other 3x units such as Tarot zyx-s, AR7200bx, ikon, skookum?

What's wrong with the 3gx?

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02-19-2014 03:23 AM  3 years agoPost 2
icanfly

rrElite Veteran

ontario

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maybe you guys aren't all excited about an old shuttle but there's a lot I'm not saying atm.

Anyway it matters, let me ask the question in a different manner,

IF YOU REMOVE A 3GX FROM A 700, WILL IT WORK AS IS ON A 550?

Of course a few servo orientations would be reset, but I can only guess it might need more tail gain. The 550 would be moving off center quicker compared to the larger 700, therefore increased gains would help return the heli to center if set slightly higher than for the 700 it was originally on then?

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02-19-2014 10:20 PM  3 years agoPost 3
payne1967

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uk

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the 3gx from a 700 will work
just enter the set up in the correct size of heli
i think you will find that you will need an eccpm set up for the 3gx as i don't think it will support a mechanical single servo set up

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02-19-2014 10:56 PM  3 years agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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3GX supports BOTH 120 degree CCPM servo arrangement AND standard single servo per axis (non-CCPM) inputs with ease. Set your transmitter swash mix appropriately, the 3GX will figure it out from there.

The 3GX will work fine in your shuttle. As with ANY FBL unit, don't expect to be able to remove it from one heli and stick it on a different heli without going through the setup process.

If you have set up a 3GX and are familiar with it, the actual process takes maybe 5 - 10 minutes. The most time consuming part of the setup is the actual mechanical setup, getting the swash level at neutral, zero degrees pitch at mid stick, getting the overall collective and cyclic pitch range. Take care of that as you always should, the rest of the 3GX setup is quick, easy, and simple.
What is so wrong with the 3gx that makes it undesirable compared to other 3x units such as Tarot zyx-s, AR7200bx, ikon, skookum?
Politics. It's not sexy. With version 3.1 software, it works quite well. If Align can get the bugs out of V4.0 associated with the heading hold gyro function, V4.whatever it will be called should make for a great little FBL controller.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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02-20-2014 01:06 AM  3 years agoPost 5
icanfly

rrElite Veteran

ontario

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Yes thanks this is what I was asking for. I've reprogrammed a zyx and AR7200BX coming from different helis onto another set up so things are familiar in terms of change of set up in the gyros.

The shuttle is being converted to ccpm with a few mods to the bell cranks, the roll ones shifted back and the pitch as is. The pitch servo is on a mount in front of the original 3. I'll show a pic of the final layout in good order. If you see the swash guide pointing forward in my close-up pic, I'm going to work with this while leaving the rear of the main shaft area clean for an zxx top starter.

3GX "not sexy"? You mean to say several guys failed to set it up perfectly resulting in some nasty crashes, nasty and costly?

I think learning the ins and outs of a variety of 3x gyros is good in the larger scheme of things.

I would like equip a 700 with a skookum720 and
I've seen what the AR7200BX can do on a dfc 480 coming from the 300x it originally was in.

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02-20-2014 01:59 AM  3 years agoPost 6
dkshema

rrMaster

Cedar Rapids, IA

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The 3GX was preceded by the 3G unit, a two-piece unit having a separate sensor and amplifier parts. As a first-generation unit, it was OK, but it did have its share of problems. Many people tried it, some were OK with it, others didn't like it.

I had one and flew it for three seasons in a 550. While it worked OK, it began to show odd behavior with random shots of left rudder in flight. I replaced it after three seasons with a 3GX unit.

Back to Align, in general. The 3G system did Align no favors as far as winning a faithful following. People were also bashing just about anything electronic from Align back then. Servos, regulators, the 2N1 unit, gyros. ESCs. However, Align servos have just quietly performed well for many at all levels. Their gyros continue to work well, and for the most part, even their ESCs work day in and day out.

Some tried the 3GX and had troubles, those troubles made it to the heli web sites. Since people rarely publish GOOD news, all that was seen regarding the 3GX were the failures. As the information was on the Internet, it HAD to be true.

It's been "the in thing" to bash Align for quite awhile. Much of the bashing is unfounded, but it continues, almost as if it were a sport. Similar animosity bubbles up continually with regard to Spektrum radios. What gets lost is that the stuff just does its job and works.

So, no, the 3GX isn't sexy, it's gotten more than its share of bad press. I'm close to having a dozen of them installed and flying at present. I've not had trouble with any of them. The rollout of software V4.0 caused a bit of consternation, I expect when the update is rolled out that the unit will be better than ever.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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