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250 Class Electric Helicopters 250 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


View Poll Results: What is the weight of your 250?
less than 320g 54 17.20%
320g to 340g 103 32.80%
340g to 360g 92 29.30%
More than 360g 67 21.34%
Multiple Choice Poll. Voters: 314. You may not vote on this poll

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Old 11-12-2009, 08:35 AM   #61 (permalink)
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Okay, mine is

trex 250 se
hs-65mg cyclic
jr 290g tail
castle phoenix 25
scorpion 2206-3900 15t
gy 401 with long wires (28 grams)
hyperion cx 3s 850 (70 grams with micro-deans)

Started at 348g including battery, 278 excluding battery.
Trimmed the motor/esc wires and eliminated bullets and used a micro-deans style 3 pin connector - 9.9 (lets call it 10) gram savings

so now i'm down to 338g w/lipo, 268g without.
I'm going to switch to either a spartan quark, 520 or jr g270 3d, all of which are roughly 10 grams with short wires, so i'll lose another 18 grams, so after my gyro switch i should be

320 grams w/lipo, 250g without lipo, overall my calcs say start to finish this should be a 8% savings overall. Anyone else lose this much weight? any different feel in the air? flight times improve?
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Old 11-21-2009, 09:17 PM   #62 (permalink)
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if fbl's counts too.
then 295gram RTF
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Old 11-22-2009, 09:40 AM   #63 (permalink)
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I got it finished @ 302 grams. I bet there is still weight to lose though.
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Old 12-05-2009, 04:46 PM   #64 (permalink)
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I just finished the build and maidened my 250 SE and it's coming in at 337 grams with all the stuff listed in my signature. Judging by the poll, it seems that puts me in the most common weight range of 320 - 340 grams.

-->Justin
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Old 12-07-2009, 10:07 PM   #65 (permalink)
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310g

All stock running 900 25c 2s (7.4v) except 18T pinion, GY48V Gyro, DS420 on tail, GF/FG Main Blades, 1g Flybar Weights
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Old 12-22-2009, 06:07 PM   #66 (permalink)
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just did an official weigh in
stock canopy,
scorpion motor (3900)
hs 65mg's
castle 25
shortened esc wires with deans micro plug
hyperion 850 g3 cx w/deans micro
290g tail servo
spartan 760 with full length wires
271 grams w/blade holder
hyperion 850 cx 3s 71 grams
so all up of 342 grams
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Old 12-29-2009, 09:40 AM   #67 (permalink)
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I tried several configurations:


Stock machine with the following mods:


MH FBL head
205d blades
FULL-SIZE V-Bar
6100 rx
3x DS285mg
1x 3500g
MH tail rotor
Metal Tail fork
Metal tail boom block
Align 20C 850mAh pack
metal geared tail rotor shaft and tail rotor pulleys in the fuse
37mm Bat style TR blades

weight: 347 grams.


Went to the Mini-V with a sat receiver, and JR290 tail servo:


weight: 310 grams


Added a CCBEC, changed to the original TR with chinese weights and preload spacer, and MH tail pitch mechanism


weight: 321 grams
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Old 01-01-2010, 05:19 PM   #68 (permalink)
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3 - HITEC HS-5045HB MICRO DIGITAL SERVO - HTC-HS5045HB
1 - DS420 WITH GP750 GYRO
STOCK MOTOR & BATTERY
HITEC OPTIMA 7 2.4 GHZ RECEIVER - HTC-28414
200MM BLADES AND 40MM TAIL BLADES

WEIGHING IN AT 334 GRAMS
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Old 01-02-2010, 08:02 PM   #69 (permalink)
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Quote:
Originally Posted by helidude3 View Post
I only have a low-tech mechanical weigher that measures in ounces. It comes in at 11.8, when multiplied by 32 it is 377. Whether or not that is correct I
1 oz = 28.35 grams. Your 11.8 should = 334.5 grams

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Old 01-19-2010, 08:44 AM   #70 (permalink)
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Mine is 485 grams (yes correct 485g) with batery and a 500E Align scale body and all the metal hop-up parts you can thing of internaly. Its not a bird i enjoy flying as i live at 5000 ft above sea level and the thin air just makes it sink like a brick in teh air even at 4600rpm, but it looks good in the air.

Wish i had the sea level presures as i did in Dubail......man there it went like a beast in a pod and boom state. And id rather repair the 250SE than the larger birds.
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Old 01-19-2010, 09:38 PM   #71 (permalink)
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348g............. and i wanna get a 900mah where can i get it
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Old 01-20-2010, 06:22 AM   #72 (permalink)
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Ebay: http://cgi.ebay.com/2-x-900mah-11-1v...item5638ebbef1

http://cgi.ebay.com/2X-RC-Lab-900mAh...item2a01cb9866

The second ones posted I have 4 of and use them in my HoneyBee V2. I have at least 10 cycles on each and there holding up great. Going to order more for this summer.

Also: http://hobbycity.com/hobbyking/store...idProduct=6784

http://hobbycity.com/hobbyking/store..._20C_Lipo_Pack
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Old 01-20-2010, 12:03 PM   #73 (permalink)
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Turnigy 1000mAh 3S 25C Lipo Pack can i use this on my t-rex250
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Old 01-20-2010, 04:02 PM   #74 (permalink)
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I've heard of people using the 1000mah but I find the 900's to be a nice fit.
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Old 01-20-2010, 04:18 PM   #75 (permalink)
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ZIPPY Flightmax 1000mAh 3S1P 15C is this to week for a 39kv motor with a 25amp esc
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Old 01-20-2010, 06:47 PM   #76 (permalink)
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I dont think so. I know most people try running 20-25C but 15C is just find. If you just sport flying and hovering then dont worry about it. Having 25C is good when you doing 3D.
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Old 01-20-2010, 11:01 PM   #77 (permalink)
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yes is just so that i can get the hang of fling .. like up and down and lift and right and 360% turns and going on straight flights with some simple moves so a 15c is ok ........348g is the wight on my t-250
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Old 01-25-2010, 01:32 PM   #78 (permalink)
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298.7 G AUW complete w/lipo

Some details:

Stock motor
16t
CC25
LTG-2100t
3xHP-ds09scd
1xHP-ds09gmd
Torsion 205
KBDD tails
Stock paddles dyed black
Gaui struts
carbon boom
Align metal bearing blocks
HP-850/cx/g3/3s 11.1
all wires shortened
MH bottom plate.
FS clear dampers
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Old 02-04-2010, 06:42 PM   #79 (permalink)
pos
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Flybareless with Mini-vbar and mikado rotor head upgrade

1xJR3500G
3xAlign DS410 full metal
Align carbon fiber blades
carbon boom plus boom case
4 mm carbon pushrod and boom support (home made)

280 +-10 grams grams complete without battery and 350 +-10 grams with an outrage 3S860mAh 25C

Picture here...

https://www.helifreak.com/showthread.php?t=190099

/Per-Olov
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Old 03-17-2010, 08:06 PM   #80 (permalink)
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Well, I just got my 250 to fly the way it should. Here's what I've got

T-rex 250
Scorpion 3900kv w/ 15 tooth pinion
stock ESC
KBDD blades
SE head upgrades
205D blades
JR DS290G tail servo
GP750
Fusuno canopy (20g)
Turnigy 800mah 20c (heavies battery I have @ 78ish grams, but best power over Aligns, Thunder Power AND Outrage NRG)
CC BEC

Total Weight 365g

Last edited by Cullen Colapietro; 03-23-2010 at 07:18 PM.. Reason: Added CC BEC after loss of power
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