SMALL - SMALL - Telemetry SMALL - Radio
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Old Jun 21, 2006, 07:02 PM
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Mavrik's Avatar
Sydney Australia
Joined May 2005
869 Posts
Do you really need 2 TREX's ???

I currently have 2 TREX carbon frames. My thoughts were to set up one as a 4S and one as a 3S.

Can you set 1 TREX up so that you can run both 3S and 4S Lipo packs ????

I find I do not get to use both TREX's enough to warrant having 2 ????

Any thoughts please ???

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Old Jun 21, 2006, 07:06 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
Sure, switch motors.

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Old Jun 21, 2006, 07:09 PM
Registered User
Joined Apr 2006
3,950 Posts
weird question, four cell versus 3 cell. can't you just interchange batteries?

i think a lot of people have several because of parts or when they crash, they have another to fly. plus, the thing is just so awesome, why not, ha.
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Old Jun 21, 2006, 07:17 PM
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enigma1's Avatar
NW Indiana
Joined Apr 2006
210 Posts
I've got three, but can never fly the third one as I'm always pulling parts off of it! I guess it's just a fancy parts holder
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Old Jun 21, 2006, 08:13 PM
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HoverDown3K's Avatar
Rochester, New York
Joined Nov 2004
2,562 Posts
I run a 450Th with 11T and I find that pinion gear works well with either 3S or 4S, I use a Castle Creations 45amp ESC, and I do not use an external BEC, the CC BEC works with either 3s or 4S.

I have two setups on my Futaba 9C radio, one for 3s and one for 4s.

BTW, I have Two T-Rexs, and wouldn't have it any other way! Keep them both and turn one into a Scale Ship. My Other rex is a MD-500E Photos here

Two Rexs!!!
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Old Jun 21, 2006, 09:10 PM
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JohnM's Avatar
Providence, RI, USA
Joined Dec 1996
2,618 Posts
I still need 2 T-Rexs to make sure I can fly all four of my lipo packs in the same day. Many times I have crashed 1 of them and sometimes both

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Old Jun 21, 2006, 10:01 PM
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TheGooch's Avatar
Palos Verdes, CA
Joined Dec 2005
438 Posts
I have two - made the mistake of buying the second one as "spare parts" - succumbed to the hey, just need 4 servos, a gyro and an rx..... So set one up for night flying.

I've tried to set both up as identical as possible so I can switch to flying the other if I crash one. However, kept one head stock plastic, the other is blinged.

But in a sense, you're right - there is no sensible justification for having two identical, - hence why I guess I blinged one and not the other.

But it's a clever way of justifying having two and tricking yourself - making one 4S and the other 3S!!!! But if you're going to really build the two, it would be more practical to keep them somewhat interchangeable wouldn't it? From a cost standpoint. You could do that and just fly one on even numbered days and the other for odd.
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Last edited by TheGooch; Jun 21, 2006 at 10:07 PM.
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Old Jun 21, 2006, 10:04 PM
Registered User
Denver, CO
Joined Dec 2005
6,695 Posts
I see after buying all the aluminum parts and a few spares I now have enough parts to make another Trex.
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Old Jun 21, 2006, 10:18 PM
I'd rather be flying...
djdaveq's Avatar
New York City
Joined May 2005
1,133 Posts
here is your solution, i did it!
use a kontronic 40 - 6 -18 esc for all cell usage
use an 11 t pinion and run about 80-90 max on the throttle on the 4 cell if its too high
and run a high throttle curve for the 3 cell.
set up to modles in your remote to adjust for the different flying charateruistics of each set up 3 and 4 cell! and your good to go!

(if u run 10 t pinion your 3 cell will super slow like a dead battery / if you run 12 or 13 the 4 cell will be WAY too fast! good luck!
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Old Jun 21, 2006, 10:40 PM
AMA 877248
Frederick, MD
Joined Jun 2002
112 Posts
Yep I now have two T-Rex SE's. One is a scale Airwolf with retracts - I just love those retracts and it flies really great. The other will be used for 3D (maiden flight this weekend) and all out flying. Both sport the Jazz 40-6-18 ESC and the Align 430L motor - this is a great combination teamed with a Futaba PCM rx.
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Old Jun 21, 2006, 11:25 PM
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3 Sheets to the Wind!
Joined Oct 2004
631 Posts
No you most certainly do not need to T-Rex's! Lemme do you a favor and send you my address so you can save yourself and send me the spare! Yep, I am a giver, anything I can do to help a fellow R/Cer!

Ron -
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Old Jun 22, 2006, 12:03 AM
Its all fun
Tonystott's Avatar
Australia, NSW, Forster
Joined Oct 2004
7,234 Posts
One for AP!
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Old Jun 22, 2006, 12:06 AM
rotarypower3's Avatar
Melbourne (east burbs), AUSTRALIA
Joined Mar 2005
894 Posts
I had 2, but recently sold the 2nd one. The only time it would get flown was when I was too lazy to fix the 1st one!

And I had to make room for the Swift!

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Old Jun 22, 2006, 01:06 AM
Old new guy
TheX's Avatar
United States, TX, Austin
Joined Sep 2004
3,152 Posts
I had 7 at one time. Loved 'em all.
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Old Jun 22, 2006, 03:19 AM
Registered User
Joined Feb 2006
627 Posts
I have two, one CDE and on SE, I just put a 500E (darths) on the CDE, love the scale look, also one one crashes you got another to fly.
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