3G FBL Trex700 Power Setup

[coolice]

Hey All.

I'm curious to hear what power systems people are using on thier Trex700 flybarless setups, what regulator and battery systems.

I've had a little hiccup with my setup and the only thing I can think of as a possible culprit is the regulator I was using not being powerful enough to keep up with the increased demand placed on it via the 3G system.
.

[ChrisB]

I am using the Align 2 in 1 with a Revo 2s2p 4400mah pack,its supposed to be up to the task.V Bar.

[Tim Procter]

T-Rex 700
Align FBL System
Align ds610 cyclic servo's @ 6v
Futaba BLS251 Tail servo @ 6v
Align 2 in 1 Regulator RCE-B6T with built in Glo
MultiGovPro
ThunderPower 2s 3600mAh Lipo

Zero problems as yet with 7 gallon through it Ian.

[Bart101]

T-Rex 700
Align FBL System
Align DS610's @ 8v
Align DS650 - Tail @ 5.2v
AR7100R
TP 2s 2600mAh Lipo

About 2 gallon's through it... No problems so far!

[Rctintin]

This may be of interest to you guys using the FBL system.

Obviously only one guys thoughts about it.

Harry's going flybarless .. Align 3G setup

[coolice]

Hey All.

This is good stuff, keep it coming.

Mine was;

> Futaba S9351's on CCPM
> JR 8900G on tail
> Fromeco Arizona giving 6 volts to main servos, dedicated 5 volts to gyro/tail servo

Basically my model performed a violant flipout of an inverted position after a botched entry into a tail-in inverted funnel and I am trying to get to the root of my problem.

Now I've been pondering over this for the last 2 weeks as to what could possibly be wrong and having read various forums I think I've settled on a power problem, related in my case to the Fromeco Arizona I was using. Now the latter is a very good regulator, I've not had any problems in the past, but at only 17 watts output (roughly 2.5 amps max from memory) I feel a little low for this 3G environment.

Here is a the video taken of my 3rd flight directly after fitment of the flybarless setup and test hover only two days before;

www.coolice.co.uk/3rd-Flight-700N.zip

Flight no.2 was spent increasing the swashplate mixes to obtain a decent roll and flip rate before starting to open the taps on flight 3.

Now I also must add I deviated from the Align instructions slighly in my machine setup as folows;

1. I chose not to use the supplied Align servo wheels with 24.4mm ball spacing, choosing to keep my HD Futaba 26mm set intact incase I wanted to return to flybarred.

2. I totally over looked the piece in the manual where you add the shorter balls to the inner swashplate ring for the blade grip links.

Both the above could give me a high gain style wobble on the cyclics, but nothing to drastic was observed and only in a chaos did I detect a slight wobble.

But otherwise as per the book, gain pots at the default 50% mark.

At present the mixer board and gyro unit have gone away for testing, but the more and more I think about it the more I now feel it was a power issue.

I'd like to hear you opinions from seeing the video.
Please excuse the not so great video, it was a borrowed camera without image stabilisation and my mate who was filming it was very cold
.

[ChrisB]

I also read that the output in Amps from the Arizona is surprisingly low and that the Align 2 in 1 is actually better hence why i use those and have had no problems of any kind.

My 600N has the older standard 6A Align reg and is FBL,i have beat the crap out of that model and never had an issue.

Many reports are coming in on the other forums of power issues on 700`s with the Align fbl as there is only one plug with a power feed to the entire unit.

Another observation,Mikado make a very clear statement about ensuring you have a decent power supply for the system and ways to ensure and test that you do,Align mention nothing of it.

When i ran the 3g on my 700 it was extremely power hungry on the Rx pack,the V bar is much less so.

[mark Taylor]

Is anyone using an elyQ reg with there align 3g set up ???
Any wiring diagrams ???

sorry to hijack your thread ian

cheers

[coolice]

Is anyone using an elyQ reg with there align 3g set up ???
Any wiring diagrams ???

sorry to hijack your thread ian

cheers

Hey Mark.

I'm going to be fitting an ElyQ reg into my FBL system once I get it all back up and running.
As to wiring diagrams I'm considering making up wiring harnesses like the ones seen on the forums so there are three connections into the reg, or just letting the power bus of the ElyQ do the work.
Personally I feel the latter is best, have the ElyQ after the 3G unit so that the reg is providing the required servo power and it is only allowing the 3G signals to pass through to the correct servo.

I'll be interested to know which way you decide to go yourself.
.

[GravityKills]

...
1. I chose not to use the supplied Align servo wheels with 24.4mm ball spacing, choosing to keep my HD Futaba 26mm set intact incase I wanted to return to flybarred.

2. I totally over looked the piece in the manual where you add the shorter balls to the inner swashplate ring for the blade grip links.

Both the above could give me a high gain style wobble on the cyclics, but nothing to drastic was observed and only in a chaos did I detect a slight wobble.
.

If I were you, I'd fix this and even shorten them further over Align's instructions.
In my experience (on 550 / 600 / 700 FBL converted), the more servo travel you use for a given cyclic movement, the more accurate the heli handles. The setup may also draw overcurrent, since servos get mechanically overloaded.

-------------------------

My own setup in the 700 NSP, which has additionally the governor and throttle servo:

3x DS 610 + 2 x DS 650
Helitron switch / regulator from a 2s LiPo.
It has worked flawlessly so far. Which is no surprise, since the regulator handles 50 A peak.The downside is, it's programmed with a soldering iron.

[nukey]

Is anyone using an elyQ reg with there align 3g set up ???
Any wiring diagrams ???

sorry to hijack your thread ian

cheers

Prior to the 3G being installed I had no problems what so ever with my Elq reg. However, once the 3G was in the helicopter I had nothing but problems with the 3g system..

I disconnected the 3G system and everything worked fine , reconnect problems again , tried a duralite reg which I have been running since with no problems.

This system does seem power hungry

[coolice]

If I were you, I'd fix this and even shorten them further over Align's instructions.
In my experience (on 550 / 600 / 700 FBL converted), the more servo travel you use for a given cyclic movement, the more accurate the heli handles. The setup may also draw overcurrent, since servos get mechanically overloaded.

-------------------------

My own setup in the 700 NSP, which has additionally the governor and throttle servo:

3x DS 610 + 2 x DS 650
Helitron switch / regulator from a 2s LiPo.
It has worked flawlessly so far. Which is no surprise, since the regulator handles 50 A peak.The downside is, it's programmed with a soldering iron.

Hey Matey,

Yes, I am going to do so now as I had the problem, which even though I do feel was caused by the power supply just to be safe I am going to follow the instructions better.
I've actually sold the Futaba 9351's and am going to fit Align DS610's as well as an ElyQ regulator I've picked up from the boys at Midlands to make sure the amp supply is good enough. Shame as I liked the Fromeco's.

Ah, I'm glad you mentioned about running smaller arms than specified as I had read about others doing the same which also helps smooth out the bounce some are experiencing to.
The only problems I think I may encounter doing so is the links fouling on the servo casing, in conversations with Wayne & Duncan Osbourne they have experienced this apparently.

Also, I've not seen it mentioned but they told me the 3G unit tightens the cyclic gains when a rudder input is given, they were told this by Align.

Thanks for you input.
.

[mark Taylor]

Prior to the 3G being installed I had no problems what so ever with my Elq reg. However, once the 3G was in the helicopter I had nothing but problems with the 3g system..

I disconnected the 3G system and everything worked fine , reconnect problems again , tried a duralite reg which I have been running since with no problems.

This system does seem power hungry

Hi there
can you enlighten me with what sort of probs you were havin with the ely-q reg????
Cheers

[mikeKendall]

I had problems with a tail glitch. So I fitted a Scott Grey Reactor2X, and a bigger RX battery (flightpower 3800 the new one). Theres a lot of talk about voltage drop with the 700 when running 6volt systems. So ensuring the servos get max can only be a good thing.

[Geek]

I had problems with a tail glitch. So I fitted a Scott Grey Reactor2X, and a bigger RX battery (flightpower 3800 the new one). Theres a lot of talk about voltage drop with the 700 when running 6volt systems. So ensuring the servos get max can only be a good thing.

Mike I have had trouble yesterday with the Tail giving me 2 kicks about 45 degrees once in foward flight and once coming in to hover. do you have the same problem or is it all the time like high gain?
any tips I am running the standard align setup. Batt, reg, servo's and 3g