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11-07-2005 05:04 PM  12 years agoPost 1
Showstopper

rrVeteran

pensacola, Fl

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I know that this one has been beat to death, but with the intro of the 450th and others whats your rex's weight.

Mine is at 725g ready to fly with the 450th motor 4s pack and wood blades. Whats everyone else running at. And if you are lighter than I am, Any ideas on how to lighten this thing up?

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11-07-2005 05:47 PM  12 years agoPost 2
Ben-T-Spindle

rrProfessor

Central Illinois

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Slightly over 700g with a Mega 16-15-3, TP 3s LiPo, and Phoenix 45 ESC.

.

... BTS

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11-07-2005 06:25 PM  12 years agoPost 3
WRXRonald

rrKey Veteran

Auburn, OH

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Well...
i'm always trying to back-off as much weight as possible.

firstly... go with lightweight gyro (CSM is good option) and lightweight Rx (electron, shadow, 146ip, etc etc)................ sorry i can't suggest shortchanging yourself on tail servo, 9650 is a heavy and necessary evil on the tail, as well on ESC, JAZZ is a heavier choice, but even on 6s i have no probs and no need for a seperate BEC.

other than that... what's your frame weight? can you trim some weight there?

couple grams can be saved all plastic tail and main head over all CNC tail and main head.

get ahold of an old Align main shaft (the hollow one) or a MH Ti shaft to save about another 7 grams over the solid Align main shafts.

canopy is heavy as sin. drill the heck out of it to remove some weight.

landing gear heavy as sin as well. your guess good as mine there.. maybe some CF rods for the skids?

and finally, ELIMINATE ALL unnecessary lengths of wire. trust me this all adds up after a while and a big pile of wires can pick up a healthy 10-20grams depending on which wires, which gauge. ESC and Battery wire especially heavy. but even gyro/servo/Rx leads add up too.

My trexy ranges in weight from 760grams to 840grams.. depending on which battery i'm using. Lehner 1020/17 motor at 60grams, 2039KV.

i have 5s 2220 Tanics and 2100 TP GenII's in at 255-245 grams.

5s 1800's Dymonds at 224 grams total.

and just recently got a 6s TPprolite (two 1320's) and its in at 175 grams total!!!!

what a beast it is when flying with the 1800's and the 6s 1320's!

when use the big batts i velcro the 2s 2220 to the bottom inbetween skids. the 3s 2220 goes in normal battery tray location of G3 frame. Perfect CoG.


when using the 6s 1320's i go both batts one on top of battery tray one below tray with rubber bands.

the 1320's not quite dead on for CoG. but that should be fixed when i get my R146 pcm Rx... (16g vs my full size PCM of 33g now)...

always flies great in the wind (was even out yesterday in the 40+ mph gusts in Northeastern, OH)... sure it was a battle to fly it even sport style, but added a fun little varible to the situation!


and it has striking ballistic climb with the 1800's and 1320's. (a bit too heavy with the 2220's, but still flies fine, just not ballistic climbrate and roll rate, in exchange for the weight of the high mah you get super duper fly times... 16-17 minutes if i soak the battery dry, at 2600rpms too!). (11t pinion, runs 3000 rpms full throttle with the 6s).

if i go 10t pinion and 335's, its great average flyer but not good for 3D, can achieve over 20 minutes sport flying with the 2220's.

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical malfunction. Every Day: CRASH :)

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11-07-2005 09:40 PM  12 years agoPost 4
Showstopper

rrVeteran

pensacola, Fl

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Thanks for the break down. Yeah All my wires are trimed to almost be too short, lol. Then i do fly a 240 on the tail but I fly the hs50. Works good for me for right now. but the canopy I think is my next plan. It does weight a lot. but there again got to have it or I can't see it lol. thanks for the assistance.

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11-07-2005 11:21 PM  12 years agoPost 5
rerazor

rrElite Veteran

Mich.

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AUW 702g.

Trex 450xl, 450th, phx25, medussa bec (weighs 10g), (4) HS56's, gy240, berg 5 rx, heliworkz ice blue CF ccpm frame, metal head. tp 3s 2100 pro lites, 335mm woodies. I did lose 15g by switching to the Darth Grand Furious canopy I won last week at rcgroups.

With the Logo 10 extreme 3D.

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11-08-2005 03:40 AM  12 years agoPost 6
Tool Man Vegas

rrApprentice

Las Vegas, Nevada, U.S.A

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showstopper, you got a pretty lite setup for running 4s. if your running a stock frame you can lighten it up. check trextuning for how.

DARTH HELI

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11-08-2005 03:59 AM  12 years agoPost 7
Showstopper

rrVeteran

pensacola, Fl

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thanks for the info guys

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11-08-2005 04:45 AM  12 years agoPost 8
dmagic

rrNovice

China

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450XL CCPM ,AUW 712g
162g 3S LiPo,JR R900S rx GY401...

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11-08-2005 05:01 AM  12 years agoPost 9
HELILAB

rrApprentice

Sunny Miami Lakes, Florida 33016

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Whats you trex weight??
My weight 660 grams ready to fly
MAH Blades
Full Metal head Align
Full Metal Tail Align and M.H.
Rotorworkz carbon frame and skids lighned about 20 grams off
3 HS 56S one HS 50 tail
C.C. 35 ASTRO 020 with heatsink
770 JR PCM Receiver without the case
carbon tail blades and fins
2000 ProLites t.p.
23 grams canopy
401 gyro and all wires trimed saved 17 grams in servos and gyro wires

Mario

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11-08-2005 05:06 AM  12 years agoPost 10
OICU812

rrMaster

Edson, Alberta, Canada

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rerazor thats a cool color scheme, easy to see me thinks......

...Once upon a time there were Nitros, flybars and frequency pins...

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11-08-2005 05:14 AM  12 years agoPost 11
Kokamo

rrApprentice

Liberty Hill Tx

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641 GRAMS HERE
450X ready to fly with....

JGF 400DH
9 tooth pinion
CC25
HS-56HB's everywhere
MS-44 Gyro
TP 2100 3S
GWS micro RX
Metal center swash
and pretty much stock all elsewhere.

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11-08-2005 12:15 PM  12 years agoPost 12
meatbomber

rrApprentice

Klatovy, Czech Republic

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My 450X-V2 weights in at 652g AUW

Setup is with the Microheli 120° CCPM mod
MS44
MS 7 Channel RX
3 x HS56
1 HS 50
3S 2200mAh Lipo
Align 400LF
Align 25A BEC

i'm going to do the dremel diet next to drop the weight even a bit more.

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11-08-2005 01:27 PM  12 years agoPost 13
Ben-T-Spindle

rrProfessor

Central Illinois

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That 725g helicopter seams to way on the heavy side – you definately need to loose some weight!


.

... BTS

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11-08-2005 02:01 PM  12 years agoPost 14
Showstopper

rrVeteran

pensacola, Fl

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I am trying to but Its a 4s setup so it seems to be pretty light compared to some of yalls set up. But It still needs to be around 700g or less. The only othe place I think I can lose weight is canopy. And maybe a 2000 mah pack. With that pack I weighed in at 710g. but it could not take the draw originally. I have worked out my throtle curves and It might just take the draw now. We will see what happens. Any sugguestions. So far I have a stock frame that I CCPM modified, all metal head exept for the rotor hub itself, JGF 450th for motor, 315 woods, carbon fiber boom, XL canopy, and JR213 on cyclic, a 240 on gyro and an HS 50 on the tail. All Wires have been trimed. The horizontal fin has been removed and cut down so that I can still run the boom supports. See what yall can do??

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11-08-2005 05:11 PM  12 years agoPost 15
Daniel Wee

rrVeteran

Singapore

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finless,

I'm curious about how you got your first T-Rex so light.

I'm assuming that your Align battery weighs abotu 144g so your body weight is 541g and this is with the heavier Airtronics tail servo.

Do you trim all your wires and do you use connectors for the motor or do you simply solder them directly? I have a very similar setup although I'm using the Neu 1105 motor and the HDS-877 tail servo.

My Neu is 7g more than the Align motor.
My JR649 is 12g more than the Futaba R146.
My TP2100 is 6g less than the Align 1900.
My HDS-877 is 13g less than the Airtronics.
My Quark ESC is 10g more than Align's 35G.
My 335 woodies are 2g more than the 315s.
I have a 7g li-po alarm onboard and a 4g ferrite ring.
My rotor head is partially blinged but I have the blinged tail casing.

That works out to be (7+12+10+7+4+2)-(6+13) = 23g.

But my weight, with the canopy (29g) on is 732g, which is 47g more, which leaves 24g unaccounted for. I'm interested to know how you lost that 24g. Thanks.

Daniel

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11-08-2005 05:57 PM  12 years agoPost 16
lloyd

rrKey Veteran

Perth,Australia (South African)

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hi chaps
i dont know why people are shaving off weight here and sqeezing it there.my trex is a wopping 780g(AUW on 3s) and with 4s(2200) is 860g..i mean even my E chipmunk i added 150g piece of lead to weight it down.yes i know it effects flight time but hay i have enough lipos.they just handle a bit better and most off all it FEELS better more solid on the sticks....just my opinion..............

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11-08-2005 06:05 PM  12 years agoPost 17
WRXRonald

rrKey Veteran

Auburn, OH

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first thiings first kids...
anyone who has posted... please be honest and own up on this one:

have you placed you trex on a scale to come up with your AUW for this thread.

it looks to me like we are getting some varying weights all over the place, yet many seem to be using similar setups.


future posts: PLEASE quote us your auw, AND tell us if your using a rough estimate, close estimate, actually just took it off the scale, or what?

we NEED to keep this apples to apples and so on. can't do that if people are taking blind educated guesses in the dark.


i personally do not have scale that goes to 800grams. i use my smaller/finer precision scale to weight out component chunks from the heli to get AUW.

i have a base that i go from taken several weeks back. anything i add or subtract i weigh out before/after and do the math on the difference.

thats how i know EXACTLY what my bird weighs with the 1320 6s prolite setup (just got the batts on saturday)... but also i know what she weighs with my old Tanic 2220 5s setup. also i did the mathmatical difference on the new 9650 servo vs the old hs56 i used on the tail.

just want to keep this honest folks. not sayinb people are blatently or intentionally lying, just that we need to know the source of your info to keep this on an 'even playing field'.

thanks folks!

remember, this info is for everybody's benefit. not to see who has the lightest or heaviest trexy. but more so everyone can see what setup and/or components might be good for the trexy they're trying to build.


SECONDLY.... an 800+ gram trexy on a 3s setup is GOING TO FLY LIKE CRAP, at least if you are trying anything but basic circuits, basic flying. if you intend on any type of 3D, or even so much as light flips, rolls, stall turns, etc... 800+ grams on a 3s trex is going to do one of two things: FALL FROM THE SKY FAST if you run it normally for you motor/battery combo.. ---or--- KILL YOUR BATTERY FAST in terms of amp draws because you had to pinion and pitch the heck out of it in order for it to catch its own weight.

trust me... i've flown an 840 gram trex on 5s setup... WAY MORE POWER than a 3s, with a very powerful Lehner motor... on a 10t pinion and 10degrees pitch... i had 2400headspeed, and the bird could HARDLY catch itself out of the air on VERY basic flying..... forget about loops or rolls like that.

since it had so much power i went to 11t pinion and a much higher headspeed and added 1 degree of pos pitch, now it much more easily catches itself from falling... but I'm SURE amp draw spike significantly. w/out the 5s to handle that spike, my batts would SUFFER terribly, as i suspect a 3s could not hanlde that kind of power need. just my opinion of the last post.

if you're 3s, keep it at or under 730 grams to have a decent flying heli.

if you're 4s/5s, you can considerably up the weight of your bird from that point and still have it fly acceptably. but if you can get 4s/5s on a 740gram trexy, it should be just as ballistic as the 660 gram lightweight birds on 3s.

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical malfunction. Every Day: CRASH :)

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11-08-2005 06:10 PM  12 years agoPost 18
cdw

rrNovice

Vienna, Austria

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My Stock Trex 450 XL (HDE) is 691g.
Align 400L, Align 25A ESC, 3s 1500MAh Lipo, 4 x HS-55 Servos, Futaba micro 6 Ch. RX, Futaba GY-401 Gyro.

Chris

PS. I just removed it from the scale.

T-Rex 450 XL & LAMA-4

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11-08-2005 06:14 PM  12 years agoPost 19
Ben-T-Spindle

rrProfessor

Central Illinois

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I wonder if the 450SE will he heavy with all that metal – or will the carbon frame make up the difference?


.

... BTS

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11-08-2005 06:20 PM  12 years agoPost 20
WRXRonald

rrKey Veteran

Auburn, OH

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thanks CDW....
CD gives us a nice point of reference for the stock birds............. verified with a scale.

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical malfunction. Every Day: CRASH :)

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