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Old Jul 23, 2012, 12:50 PM
Life's short - Enjoy!
DeeCee 57's Avatar
Zurich, Switzerland
Joined Nov 2009
550 Posts
Help!
T-Rex 450 3GX FBL and T8FG, settings anyone?

Hi guys,
just bought the Rex second hand and this is my first FBL...

Anyone out there using the same set-up (R617FS receiver) and willing to share his (hers ) channels use and radio settings?

Thanx a billion
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Old Jul 23, 2012, 04:13 PM
1.21 Gigawatts!
Steph280's Avatar
Irvine, CA, USA
Joined Oct 2000
7,299 Posts
I don't have the exact setup, but I do run a couple Align helis with 3GX and Futaba radio. They are pretty similar:

Use HR-3 swash type.

1: AIL, reversed, right front servo
2: ELE, reversed, rear center servo
3: THR, reversed
4: RUD, reversed
5: GYRO normal
6: PIT, normal, left front servo

Swash mixing:
AIL: +39%
ELE: +39%
PIT: +37%

ps. I was at Zurich this past April, lots of beautiful grass flying fields there! You are lucky to be there.
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Old Jul 24, 2012, 12:48 AM
Life's short - Enjoy!
DeeCee 57's Avatar
Zurich, Switzerland
Joined Nov 2009
550 Posts
Thanks a bunch Steph

Will apply all these and enjoy the flying.

As for the area, yes it is still nice, unfortunately getting crowded which means noise sensitive people all around... forget any noisy or turbine powered flying on our field...
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Old Jul 24, 2012, 10:32 AM
Life's short - Enjoy!
DeeCee 57's Avatar
Zurich, Switzerland
Joined Nov 2009
550 Posts
Hi again Steph

Applied your settings and it works (though I had to use AIL -39, ELE +39 to get the lateral cyclic in the correct direction).

The only problem left is that when applying collective only the elevator servo moves up, e.g. the aileron and pitch stay level...


Anyone a clue on that?

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Old Jul 24, 2012, 10:56 AM
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wlee1017's Avatar
Joined Jul 2011
1,389 Posts
Quote:
Originally Posted by Steph280 View Post
I don't have the exact setup, but I do run a couple Align helis with 3GX and Futaba radio. They are pretty similar:

Use HR-3 swash type.

1: AIL, reversed, right front servo
2: ELE, reversed, rear center servo
3: THR, reversed
4: RUD, reversed
5: GYRO normal
6: PIT, normal, left front servo

Swash mixing:
AIL: +39%
ELE: +39%
PIT: +37%

ps. I was at Zurich this past April, lots of beautiful grass flying fields there! You are lucky to be there.
Quote:
Originally Posted by DeeCee 57 View Post
Hi again Steph

Applied your settings and it works (though I had to use AIL -39, ELE +39 to get the lateral cyclic in the correct direction).

The only problem left is that when applying collective only the elevator servo moves up, e.g. the aileron and pitch stay level...


Anyone a clue on that?

If you setup align 3gx fbl, you must disable (turn off) swash mixing. All swash mixing is done by 3gx. c.f. your Trex-450 3gx manual p25. Also, you need to go thru 3gx setup procedure from manual.
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Last edited by wlee1017; Jul 24, 2012 at 11:02 AM. Reason: add: (turn off)
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Old Jul 24, 2012, 01:19 PM
Life's short - Enjoy!
DeeCee 57's Avatar
Zurich, Switzerland
Joined Nov 2009
550 Posts
also thanx to you wlee

And I finally solved the problem, all set and ready to whirl


For reference, it seems there is more than one way to set-up the whole system... finally having all the correct deflections I have the following (fine adjustments will be done later):

Model Type:
HELICOPTER/HR3/OFF

Function:
1 AIL
2 ELE
3 THR
4 RUD
6 PIT

Reverse:
1 AIL REV
2 ELE NORM
3 THR REV
4 RUD REV
5 GYRO NORM
6 PIT NORM

Swash/AFR:
AIL -39%
ELE -39%
PIT -37%

R617FS receiver:
Channel 1 Red
Channel 2 Amber
Channel 3 Purple
Channel 4 Green
Channel 5 Blue
Channel 6 Yellow
Channel 7 tri Black/Red/White
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Old Jul 24, 2012, 01:40 PM
Registered User
wlee1017's Avatar
Joined Jul 2011
1,389 Posts
Dee, good you got it. do you go through 3gx setup procedure as stated in manual. Are you still get cyclic pitch +/- 9 deg and collective pitch +/- 12 deg. keep us post your maiden flight.

I am glad and learn new things everyday. I should try this setup on my Dx8 /w swash mix ON and test..........
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Old Jul 24, 2012, 01:53 PM
Life's short - Enjoy!
DeeCee 57's Avatar
Zurich, Switzerland
Joined Nov 2009
550 Posts
yeah, though this one has already flown and been set-up, it was another brand of radio (...), so I will redo the 3GX set-up. And I still have to program the curves.
Actually what had happened is that I copied my sold Flasher 450 for the "new" bird, and that was not a good idea. Better would have been to start from fresh

As for the "maiden", it is set for in about 2 weeks as I'm going abroad (no, no vacations yet)

Quote:
try this setup on my Dx8 /w swash mix ON and test
Good luck with that, don't check anything, just go direct into idle-up 3 for fun
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