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T-REX 450 › TREX 450 PRO V2 3GX OFFICIAL THREAD
10-27-2011 01:08 PM  7 years agoPost 121
OLROY

rrKey Veteran

Wichita Ks

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well you don't hear anything bad about them now so guess it's a nice set up

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10-27-2011 01:46 PM  7 years agoPost 122
KevinB

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Earth

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Anyone hear when they will finally release the V2 without all the electronics ?

KevinB

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10-27-2011 06:08 PM  7 years agoPost 123
jackheli

rrProfessor

Vancouver - Canada

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Hi guys,

maidened my Pro v2 but the tail has a nasty wag I can't get rid off. Gain is already on the low side...

Anyone having the same issue?

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-27-2011 07:54 PM  7 years agoPost 124
pturcotte

rrNovice

Deux-Montagnes, QC, Canada

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Had the same issue.
Gain IS NOT on AUX2.
Check the manual I can not recall on which ch it is.
Regards,
pturcotte

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10-27-2011 08:20 PM  7 years agoPost 125
jackheli

rrProfessor

Vancouver - Canada

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oh! Guess I missed that.

I'll take a look at the manual.

Thanks.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-27-2011 08:57 PM  7 years agoPost 126
jackheli

rrProfessor

Vancouver - Canada

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I checked the manual. It seems this issue is only with JR radios. I'm using Futaba.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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02-07-2012 11:06 PM  6 years agoPost 127
Schryver

rrApprentice

Louisville, Kentucky

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If your using Spektrum and satellites then you need to be aware that the Aux2 - Channel 7 is used for the gyro gain.

Also be aware that the tail blade grips on this new V2 are prone to let go. I own a LHS and have built 3 so far. One of these had the bearings one of the tail blade grips fail. It failed from the very start as we were fighting tail issues all over the place.

This was the first one I set up with the satellites and I didn't know the gain was on channel 7 instead of channel 5 when you use the satellites. Once I figured that out I was still fighting tail issues. Discovered the one blade grip appeared to be further from the hub than the other and replaced with a OEM Sport tail grip/hub assy and all went smooth. No more tail issues.

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02-08-2012 12:08 AM  6 years agoPost 128
Schryver

rrApprentice

Louisville, Kentucky

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Now what I want to ask is, is anybody else having any weird elevator servo/gyro porpoising issues? The last heli I sold, which also happens to be the one I described above, is doing some weird stuff on the elevator axis.

Customer brought it in after his first crash and repaired the heli without noticing that he had a damaged elevator servo, so it went in a 2nd time. After the next repair it was flying great. After 6 flights it starts porpoising really bad. Not like an overly aggressive gyro gain on the 3GX, but slower and very hard to control.

Just wondering if anyone else had similar issues???

Thanks

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02-09-2012 08:45 AM  6 years agoPost 129
rspiegel

rrVeteran

Austin,TX South Buda

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Total-G
Has anyone flown this with a Total-G. I will be starting a build next week and will be using a Total-G FBL Controller.

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02-16-2012 03:51 AM  6 years agoPost 130
guardian7

rrNovice

Lancaster Ca. USA

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I bought a 450 T-Rex Pro V2 3GX and now have a 3GX Nightmare, one big problem is the unit has no power status LED until it actually binds, this makes it very tough for beginners to verify power and the instructions don't make this clear. Next, the wiring info is very poor if your trying to interface with a Spektrum AR6115E receiver using the supplied interface cables, your in for ride. The preferred method and only documented configuration for Spektrum is to use satellite receivers connected on the side Antenna ports. I finally found a video on Youtube which showed me how to interface a 3GX with a spectrum receiver using supplied cables and got it bind. Just as the 3GX lights came on my new Heli started gushing smoke from every hole, my trusty Fluke revealed there was 12vdc going out to the 6 vdc servos which caused the smoke and fire. Now all my electronics are fried and I'm feeling gutted! I also tried to follow the software instructions on connecting the 3GX to my Spektrum receiver using supplied interface cables with no luck. The dealer said my receiver would work with the 3GX unit but instructions have failed me, no schematic diagrams, improper color codes, no pin outs, etc. I now have an expensive pile of stinky burnt crap and my Heli is collecting dust. I do thank Youtube for providing much needed 3GX/Spektrum connection information.

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02-17-2012 01:52 AM  6 years agoPost 131
knightofcarnage

rrElite Veteran

chicago

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How did you power up the system, Direct ? or tru the BEC wire from the ESC? or Direct to receiver from your main battery pack? Please provide the link to the video. Love to see it. There few ways you can wire it up.

1) most common way.
main batt (11V) -> ESC -> 3GX <- sat recivers
2) main batt (11V) -> ESC -> (disable BEC, by removing the 6V power source) -> 3GX <- sat recovers and you have to supply 6V supply to the 3GX usally tru a separate BEC (voltage regulator) and a second battery source.

I have a feeling that your connect you main batt directly to the 3GX or the receiver. You can't do that , the 3GX is MAX 7.4V (2S lipo). I believe the spectrum makes a receiver with a voltage regulator but once again its for 2S lipo. Post the link please. As far as the instruction in the manual they are fine. They show both sat reciver setup and standard reciver in diagram. They ONLY thing i guess you can say its confusing they don't show that the MAIN batt is connected tru the ESC.

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02-17-2012 02:48 AM  6 years agoPost 132
michael88997

rrElite Veteran

Lewisville,Tx

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How are some of y'all laying your electronics out? I have a 3gx 6s setup, I can't decide if I should put my ice 50 inside the frames or on the outside, and if the 3gx should go on the tray or on the gyro plate. The ice does fit bearly inside the frames sideways

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02-17-2012 05:04 AM  6 years agoPost 133
knightofcarnage

rrElite Veteran

chicago

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I"m have my ice 50 inside. I will try to post some picks this weekend. As far as the gyro location inside the frames under the main shaft is the best spot.

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02-17-2012 08:15 AM  6 years agoPost 134
guardian7

rrNovice

Lancaster Ca. USA

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knightofcarnage, I used the ESC 3 pin wire to THR. The Instructions do not provide info for using the interconnect cables with standard Spektrum receivers, only Satellites, or Futaba, and with Futaba they don't supply pin info on the receiver side for the interface cables which breakout into 6 single wires, red, orange, yellow, green, blue, purple, leaving a beginner to guess. What ever happened to schematic diagrams?

T-Rex 450 Pro V2 FBL

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02-17-2012 01:30 PM  6 years agoPost 135
michael88997

rrElite Veteran

Lewisville,Tx

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Ya I just started building it but I put the frames together and saw it does it in there, but it takes up the entire inside so I would have to put the 3gx on top

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02-17-2012 03:22 PM  6 years agoPost 136
knightofcarnage

rrElite Veteran

chicago

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knightofcarnage, I used the ESC 3 pin wire to THR. The Instructions do not provide info for using the interconnect cables with standard Spektrum receivers, only Satellites, or Futaba, and with Futaba they don't supply pin info on the receiver side for the interface cables which breakout into 6 single wires, red, orange, yellow, green, blue, purple, leaving a beginner to guess. What ever happened to schematic diagrams?
There is an over all generic diagram on page 17, and on page 21 is for a standard futaba receiver. There is not to much difference between wiring up a futaba receiver vs a spectrum standard, mostly a naming/ channel allocation . I person don't like spectrum for many many reason. But anyways the only way i see you get a reading of 12V is if you plug in the main batt into the receiver or 3gx unit. For binding / setup you should use a normal Nicad receiver pack (5.2V).The 450pro/450pro v2 are one of aligns best belies i own. However it is not the best heil to learn on. Mostly because it has a TT tail and very nimble/quick. Sorry for your loss, and don't give up on the hobby. Good luck. If you any questions you can just PM me.

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02-18-2012 03:21 PM  6 years agoPost 137
michael88997

rrElite Veteran

Lewisville,Tx

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What clamps the head down on the v2 fbl? My Jesus bolt is in and my head moves side to side, I don't see a clamp on the trailer arms like they use to have

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02-18-2012 04:54 PM  6 years agoPost 138
knightofcarnage

rrElite Veteran

chicago

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Its the jeasue bolt and the longer bolt that goes tru the arm and connects the clap. It should not move back and forth.

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02-18-2012 05:04 PM  6 years agoPost 139
michael88997

rrElite Veteran

Lewisville,Tx

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Well that's why I'm confused, I don't see a clamp on the arms

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02-18-2012 06:01 PM  6 years agoPost 140
magbarn

rrNovice

Riverside, CA

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Guardian7:
For you to get 12 volts into your electronics you possibly had the following:
1. Defective regulator on the esc sending full voltage
2. Wired your main battery pack directly into the 3gx
3. (most likely) somehow on the multiplex wires (the ones that have one connector splitting into 3 with 1 wire a piece), you crossed them incorrectly causing a short which then overloaded and fried the esc regulator which then caused the full voltage to go into your electronics.

You live in the southern California area. There's tons of local flying fields that should have a fellow experienced flier who can help you with the wiring. Personally, I never bothered with full size receivers. Always ran satellites for neatness and less hassle.

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