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Esprit Model . Thunder Power RC . Real Raptors

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e-Align T-REX 450-500-600 > advice on my 1st 3d setup on TX
 
 
flytech
Veteran
Location: Sunland, CA

i'm about to start my 3d experience. my question is on the tx (eclipse7) setup. my hover and full throttle climb (with tail sticking solid) seems to be well setup at

full negative pitch is -10deg and full positive is +10deg
pitch-epa: -125%(negative pitch) - +125%(positive pitch)
pitch-cv: 50-inh-70-inh-100
throttle-cv: 0-inh-65-inh-100
elev-exp: -30%
aileron-exp: -30%
rudder-exp: +50%

i've started setting up flight mode 2 for 3d with:

pitch-cv: 0-inh-70-inh-100
throttle-cv: 100-inh-65-inh-100
elev-exp: -15%
aileron-exp: -15%
rudder-exp: +50%

i've hovered it with this setup and switched between modes without much difficulty. notice i increased the cyclic response in flight mode 2 (thinking it'll flip faster).

what do you think? am i ready to flip it over? what should i change?

thanks a lot in advance!
12-28-2004 Over year old.
HOMEPAGE  
 
 
Jarod
Veteran
Location: USA

Its hard to say yes or no. Thats really your call. If you have confidence with it while its in the air then I say go ahead, make sure you have some experience with it or have some one with you who has expierence setting up and flying 3D helis. If you have never done aerobatics with a heli then a simulator is highly desirable. I love hitting the space bar for a new heli. I didnt learn FF flight or hovering with a sim. That I learned on my own with practice flying a heli. But for the 3D flights I got the sim installed and it is 100% worth it. My first flight in the sim and immediately i noticed how I make the same mistake while banking in a turn. Im used to flying planes so Im hard wired to pull back on the elevator while banking in a turn. The helis dont need as much elevator as the planes.
12-28-2004 Over year old.
 
 
flytech
Veteran
Location: Sunland, CA

yep, spent a lot of time on the sim. a lot.. i'm hovering inverted + nose in/out..

i guess if anything i wonder if starting as a beginner on the real thing if it would be better to setup the throttle curve on flight mode 2 at:

100-100-100-100-100

rather than my:

100-inh-65-inh-100

if either way is harder or easier..

thanks for the response!
12-28-2004 Over year old.
HOMEPAGE  
 
 
Jarod
Veteran
Location: USA

My throttle curves are as follows and work for aerobatics.

I have 5 point curves in my Futaba 9C

Normal: Throttle, 0 - 60 - 80 - 80 - 80
Idle1 : Throttle, 93 - 91 - 86.5 - 91 - 93

I like to keep the headspeed up and use collective rather then throttle. It works well this way for me and many others whom fly T-Rex'z.
12-29-2004 Over year old.
 
 
AshleyDavis
Senior Heliman
Location: Southampton, UK

I also run an eclipse tx.

My idle up 1 is setup as follows :

pitch 0-inh-60-75-95
throttle 100-90-85-90-100

idle up 2 is the same except throttle is 100-95-90-95-100


With the electrics you don't really have to worry about overspeeding
the motor so you could have a flat throttle at 100 if you wanted.

With the rex the challenge is fine tuning the collective such that you don't bog the motor.

I wouldn't just flip it, you might find that the negative pitch isn't quite as powerful as you expect, I'd go with a roll to inverted and then just slow it down to hover, if there isn't enough negative for a hover then you can just accelerate away and use the transitional lift to climb and half roll back to normal flight.

Ashley.
12-29-2004 Over year old.
 
 
flytech
Veteran
Location: Sunland, CA

sounds good. by the way Ashley, i've heard that the negative climb-out wasn't that great on these birds and wondered if you, Jarod or anyone has been dremeling out the pitch lever's frame holes to get more pitch out of the system.

also, can anyone comment on:

1) their first 3d experience. what they would've/should've done or watched out for it they did it again?

2) is anyone increasing their cyclic response (ie; EXP settings on TX) in their 3d flight mode for easing flips etc? or just keep it the same on all flight modes?

thanks again...
12-29-2004 Over year old.
HOMEPAGE  
 
 
AshleyDavis
Senior Heliman
Location: Southampton, UK

I haven't really experimented much with the negative pitch climb on mine yet, I expect it will need a 2mm dremel extension to get the negative pitch needed for good inverted performance. So far I've just flown it inverted to 'have a feel', it's a lot twitcher than my Rappy 50 and I don't want to break it just yet. Current experience is that I don't have a great deal of negative climbout when flying inverted. So flips could be a bit scary.

Ashley.
12-29-2004 Over year old.
 
 
Jarod
Veteran
Location: USA

I had to lenghten the control linkages on the rotor grips. This allowed me a little bit more negative pitch. I have done back flips forward flips with mine so far and it was as expected. It deffinately wont have sufficient negative pitch if you followed the directions to the T to if you want to do inverted climb outs. You need to dremel the frame holes down a bit. I havent done so yet, im still trying to make it work without cutting anything. I just checked my pitch and im currently getting -3 / +7 degrees of pitch. Is that normal? I just got my pitch gauge today in the mail. Im not used to working with it yet so it possible my numbers could be off. Im going to see if I can find replacement threaded rods for the rotor grip linkages. I think if you can make them longer you could acheive more negative pitch.
12-29-2004 Over year old.
 
 
vinrx7
Veteran
Location: Americas finest city

-3??? Damn, that might not be enough to even give you a good climb inverted. Dont get too low on your flips. get yourself stuck in a permanent inverted hover in ground effect. hehehe.
you could always have someone go and grab the skids. j/k

STUPID TREE!!!
12-29-2004 Over year old.
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Spartan Missile
Senior Heliman
Location: Coventry, UK

I thought it was just me.
Can't get enough -ve pitch as described in the manual.
12-29-2004 Over year old.
 
 
flytech
Veteran
Location: Sunland, CA

at least the pitch problem has been identified by Align themselves.. from http://www.align.com.tw/html/en/c_rindexe.htm:

Quote 
For 3D performance, you have to make some replacements on the initial version, especially to change the SF mixing Levers (parts no.HH4005A) to enlarge its pitch. Detailed upgrade parts numbers are HP2008 &HP2009, if the range of pitch is still not enough long, you could also make a micro adjustment on the Lift & Right Main Frames (parts no.HB2002 & HB2003) by a file


so i imagine they must have a new version of HH4005A and hopefully longer cutouts on the frame (HB2002/HB2003)
12-29-2004 Over year old.
HOMEPAGE  
 
 
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Mikado Modellhubschrauber . GrandRC . CanoMod

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e-Align T-REX 450-500-600 > advice on my 1st 3d setup on TX
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