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T-REX 500 › Pro "EFL" gyro placement (top or bottom?)
08-31-2012 09:07 AM  5 years agoPost 1
Dood

rrProfessor

Wescanson

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Where did you mount your flybarless controller -- above the tail gear box or below the tail gear box?

With the receiver on top and the 3GX on bottom, I think it will look neater overall, but when it's on the bottom it isn't really accessible for adjustments.

Does the 3GX work better above or below, or is there no discernible difference?

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08-31-2012 01:22 PM  5 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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No discernible difference. Accessibility would be a good thing, although once you get it set up, you don't need to be messing with it all the time. If it looks neater and you can work around things being kind of hard to get to in the short term, mount however you want.

-----
Dave

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

Team Heliproz

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08-31-2012 02:11 PM  5 years agoPost 3
jschenck

rrProfessor

La Vista, NE.

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top mount for me. I was able to hide all the wires inside the frame and bring them just under the gyro plate. It's really nice to have access to the 3GX directly for setup.

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09-02-2012 05:11 AM  5 years agoPost 4
jschenck

rrProfessor

La Vista, NE.

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Lets see how good of a camera my Samsung GT 10.1 makes

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09-02-2012 08:12 AM  5 years agoPost 5
Colt 1911

rrNovice

USA

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I'm very anal about my builds I hate seeing wires, so buttom mount inside the frames for me, can't see any wires and I can still do all the programming needed.

The right of the people to keep and bear arms shall not be infringed

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09-04-2012 08:00 AM  5 years agoPost 6
Dood

rrProfessor

Wescanson

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jschenck, I notice in those pictures you haven't got any rear canopy standoffs. How is that working out for you?

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09-04-2012 12:47 PM  5 years agoPost 7
jschenck

rrProfessor

La Vista, NE.

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need to order some more - flying naked right now. I took them off for repair on my last crash and misplaced them.

Also had to rerun the tail servo wire (JR colored one) because it was too close to the tail transmission gears. Looks about the same as the photos though. Just need to make sure all the wires clear the gears.

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09-05-2012 12:32 PM  5 years agoPost 8
tomd27858

rrApprentice

greenville, nc usa

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I have my BeastX mounted on top. Makes it very accessible.

Team HeliDirect

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10-14-2012 01:25 AM  5 years agoPost 9
Dood

rrProfessor

Wescanson

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I've been dickin' the dog on this one for a few months (Got this at IRCHA courtesy of Experience RC). I've been distracted with a lot of other things. This build should have taken a day or two.
Finally I got it done. Here's a few pictures of how everything looks.
It took a while to figure out how to use the 3GX, but got that figured out (I hope).

Any pointers on the 3GX? Where should I start with the gains?
Any weird tendencies at spool up or spool down I should know about?

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10-14-2012 01:28 AM  5 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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Make sure you updated the 3GX to V2.1.

As with most FBL systems, stay on top of the heli when you land or shoot autos till the rotors are below flying speed.

-----
Dave

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

Team Heliproz

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10-14-2012 01:35 AM  5 years agoPost 11
Dood

rrProfessor

Wescanson

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I have the software for v2.1, but I've been putting that off as well. The cord they give you on that USB dongle is about 4 inches long.

I either need a USB extension, or a servo extension to splice in the middle of that dongle.

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11-08-2012 09:01 PM  4 years agoPost 12
NiCad

rrApprentice

Picton, Marlborough, New Zealand

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Lets see how good of a camera my Samsung GT 10.1 makes
That's where I mount the controller for my 3G unit too. I have the sensor sitting on the little platform under the tail boom and the Rx sitting on the main platform directly under it.

Seems to work out for me. My setup (Pretty standard):
-Align DS510s on cyclic
-Aign DS520 tail
-Align 3G tri-axes gyro
-Spektrum AR8000
-Spektrum Dx7s
-Align RCE-BL701G
-Align 500 MX

So, nothing special there apart from the fact that mine's the ESP version.

PS Hey, I like your idea of the heatshrink over the satellite Rx antennae.

Align T-Rex 500ESP 3G w/FPV rig.
Assault 450DFC.

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11-20-2012 08:39 PM  4 years agoPost 13
Blax1

rrVeteran

Sydney Australia

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Have you flown it yet Dood?

Mines coming together now, I'm using a AR7200BX, early days a LOT to learn....

Hope yours goes well.

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11-20-2012 11:46 PM  4 years agoPost 14
Dood

rrProfessor

Wescanson

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Yes I've flown it.
My suggestion is to not use the long aluminum servo arms included in the kit. if you do use them don't use the outer hole. the other problem with the servo arms was that it is about impossible to use less than about 100 clicks of sub trim.

It Flys well. I've had the tail blow out a few times doing fast backwards flight.

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11-21-2012 12:11 AM  4 years agoPost 15
Blax1

rrVeteran

Sydney Australia

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Yes I do recall reading somewhere about the arm lengths, so I haven't loctited the balls yet, I'll see how it dials in with regards sub-trim and go from there.

Can you adjust gains to stop the blowouts?

BTW-how do you connect up the battery above or below the canopy? I'm just trying to sort out the Esc location to get the leads out under the heli-
I hate powering up a heli- in Throttle Hold, then putting the canopy on asking for trouble IMHO.

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11-21-2012 12:18 AM  4 years agoPost 16
Dood

rrProfessor

Wescanson

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I put the ESC in backwards, power plug lead towards the front. It makes it easier to put the canopy on.
My esc is still under the battery plate, and I connect with the canopy off. You'll need to tie up the wires on the motor end so they clear the pinion.

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11-21-2012 12:57 AM  4 years agoPost 17
Blax1

rrVeteran

Sydney Australia

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You'll need to tie up the wires on the motor end so they clear the pinion.
I'll do that, thanks.
I put the ESC in backwards, power plug lead towards the front. It makes it easier to put the canopy on.
Doing the same, but its tight, I'll try and get that sorted out tonight, then onto the FBL unit, that will give the grey matter a work out...

Cheers appreciate your ideas.

3rd photo is my preferred way
Its funny how the manual shows the caps facing down but the battery lead coming from the other end.... Typo I guess?

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11-21-2012 01:10 AM  4 years agoPost 18
Dood

rrProfessor

Wescanson

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My wires aren't long enough to make the third way remotely feasible. I would think that would make it too hard to get the canopy on.

The first way looks the best, but having the wires up top made it a tight fit to get the canopy on. That's why I reversed it.

I've already considered cutting off the bottom lip of my canopy with a dremel.

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11-21-2012 01:21 AM  4 years agoPost 19
Blax1

rrVeteran

Sydney Australia

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Sorry I dropped in a few edits/pics after posting.

I was thinking of simply mounting the Esc under the heli- on the lower frame, easy hook up then, but look messy and a vulnerable location, although my Beam450 is like that.....hmmmm

Yes the Dremel may well be the answer.

Its a fun heli- to build, Align's QC is up there these days for sure very happy with it so far.

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T-REX 500 › Pro "EFL" gyro placement (top or bottom?)
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