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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 58 18.13%
320g to 340g 105 32.81%
340g to 360g 92 28.75%
More than 360g 67 20.94%
Multiple Choice Poll. Voters: 320. You may not vote on this poll

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Old 12-05-2010, 07:15 PM   #121 (permalink)
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Quote:
Originally Posted by dze View Post
sweet! i didnt realize someone else ran theirs on 2S .. mine is flying great at a svelt 307.4g AUW -- my timer is set for 4 minutes, 3 1/2 minutes is better for alot of aero.
my setup:
-copterx250:
-align skids,boom, tailhouse, swash,shafts,washout base,plastic links,gears,bearings, bottom plate
-MH control arm/slider (nothing special the stocker was fine)
-align 205 carbons
-fusuno canopy
-850 2S hyperion
-tonicx 4850/15T @100%
-gaui18 esc
-exi D213 metal gear servos (heavy and required modding the mount ears and removing frame side to mount but the price and reliability was right haha)
-telebee gyro/ inolab201 analog servo (not so great but good enough for me)
Well, I only decided to get a copterX and run it on 2S after seeing your video/posting.

I recently got turnigy ds-480 for tail servo (my 3rd tail servo in only a few dozen flights),
the tail wagged much more than previous servos (align ds-420, followed by a hxt900), but
after a lot of messing its wag was acceptable, then I promptly crashed it. I was flying
upright, low and slow, but it got snatched by a tall weed.

Broke the tail boom completely in half, chipped in the mainblade and maingear, but didn't even
bend a flybar or feathershaft.

I repaired the boom by inserting an inch of king2 tail boom inside and red loctite it since
hobbyking is backordered on their boom. But I haven't flown it since after repairs I realised
the maingear chipped a tooth and was making clicky sound.
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Old 12-05-2010, 08:28 PM   #122 (permalink)
dze
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well thats flattering thanks, yes i hate it to when i have one setup and working great and crash it, then its usually a long process of getting it back to right again over several flying sessions .. but i myself am really happy with the 2S layout, its not quite as brutal as the 3S and really feels lighter in the air while staying quite capable .. looking forward to seeing you get it going again
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Old 01-10-2011, 02:46 AM   #123 (permalink)
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Well I restrained myself from buying one of these for this long, but it was only a matter of time. Bought it 2nd hand and gave it a good going over, ditched the gyro tray, shortened the leads on everything. Standard SE with D201HB on tail. 325gms...
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Old 01-14-2011, 10:25 AM   #124 (permalink)
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Ok mine : 335.6g

Mostly stock with :

hitec 5000/5083
t-pro cyclic
align motor/esc
plastic stock blades main and tail
Futaba R6106HF (meant to get the HFC but ordered this one by mistake)
Blue Lipo 1000 mAh 20C 3s (thought it would fit but not too good, new canopy holes)

Does anyone know which blades have less mass, plastic vs. CF?
I am about to shorten every wire, mainly to clean up the look but a few grams lighter is an added bonus too. I will prolly do away with the esc to motor connections too. I have thought about drilling some holes in the CF frame to save some weight and anywhere else that wont sacrifice integrity. I can't believe the guys that have like 290g birds, I bet those machines are very nimble and fly like a bumble bee on crack.
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Old 01-16-2011, 09:03 AM   #125 (permalink)
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379 grams!!!

A heavy beast!

Stock ESC and motor.
AR8000 +Telemetry TM1100 (probably adds some weight )
Outrage NRG 850mAh (5C)
Stock cyclic servos
Ino-lab D201HB for tail
CF205D
KBDD tail blades
Canomod phantom canopy (adds 4 grams)
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Old 01-16-2011, 03:22 PM   #126 (permalink)
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T-Rex 250 Super Combo (GP750 + 3xDS410 + 1xDS420, stock motor, stock ESC)
Futaba R617FS receiver
Aluminum boom block
CF tube around stock pushrod
Aluminum bellcrank
37mm tail blades
205D CF main blades
Fusuno Canopy
Xtreme landing gear
XT60 plug
-------------------------------------
274 gr.


Nanotech 1000mah 25-50C
---------------------------------------
83.5gr

Total AUW: 357,5gr

Flies like a charm, not too skwirelly, I like it that way as I don't do any 3D
Extra weight of the 1000mah lipo is worh evry second of the 8-9min flight time
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Old 01-26-2011, 09:34 AM   #127 (permalink)
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Allright after stage 1 weight reduction I now have AUW at 311.1g! Not too bad. I shortened all wires that I could and kept the motor connections mainly cause I am trying different motors in the near future and don't want to solder each one. I did trim some material on the frame in not so critical areas and did away with my horiz. and vert. fins on the boom. I guess that is where Finless Bob got his name and when I first read his screen name I did a lot of thinking on the actual function they serve and truthfully I don't think they are needed. Of course the vertical fin protects the tail blade and it is needed but I just wanted to see how low I could go. I still have ideas for Stage 2 weight reduction and will post my results when finished. Here is one teaser: drill holes all over the tail boom. but the tail boom does not weigh much so there is only marginal savings there.
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Old 01-26-2011, 04:14 PM   #128 (permalink)
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AUFW = 304 grams (including Turnigy 2S lipo)



still working on trying to cut down more on her weight
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Old 02-13-2011, 08:09 AM   #129 (permalink)
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Quote:
Originally Posted by card_shark View Post
Allright after stage 1 weight reduction I now have AUW at 311.1g! Not too bad. I shortened all wires that I could and kept the motor connections mainly cause I am trying different motors in the near future and don't want to solder each one. I did trim some material on the frame in not so critical areas and did away with my horiz. and vert. fins on the boom. I guess that is where Finless Bob got his name and when I first read his screen name I did a lot of thinking on the actual function they serve and truthfully I don't think they are needed. Of course the vertical fin protects the tail blade and it is needed but I just wanted to see how low I could go. I still have ideas for Stage 2 weight reduction and will post my results when finished. Here is one teaser: drill holes all over the tail boom. but the tail boom does not weigh much so there is only marginal savings there.
CF blades has less weight, but depending on the type, make, etc. you'd have to try them all and see which ones, weighs less. doing good on your weight reduction, keep it up! or should i say keep it down?
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Old 02-13-2011, 08:15 AM   #130 (permalink)
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Finless 250

AUFW: 297grams
including Turnigy 2S 800mah Lipo(i'm wondering if there is any other lipos lighter than this??)



wires still need more trimming, the following needs to be changed ESC, cyclic servos, and Paddles.(the paddles on my other 250 has been changed) . Also the CF pushrod needs to be upgraded, i found a lighter version on the internet already made. Target Weight: 250grams including lipo.

This one is a little bit more heavier.

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Old 02-13-2011, 12:25 PM   #131 (permalink)
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Quote:
Originally Posted by pitchp View Post
Finless 250

AUFW: 297grams including Turnigy 2S 800mah Lipo(i'm wondering if there is any other lipos lighter than this??)

wires still need more trimming, the following needs to be changed ESC, cyclic servos, and Paddles.(the paddles on my other 250 has been changed) . Also the CF pushrod needs to be upgraded, i found a lighter version on the internet already made. Target Weight: 250grams including lipo.

This one is a little bit more heavier.

A tip: remove the head "button"stopper. Saves weight and also the bladeholder arms that might bent if you crash. Removed it myself after my first crash

Also, why nuts on the bladeholderscrews?
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Old 02-13-2011, 04:35 PM   #132 (permalink)
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Originally Posted by Gameburg View Post
A tip: remove the head "button"stopper. Saves weight and also the bladeholder arms that might bent if you crash. Removed it myself after my first crash

Also, why nuts on the bladeholderscrews?
do you have close up pics of this? trying to picture in what it would look like with out them.
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Old 02-13-2011, 09:21 PM   #133 (permalink)
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Ok still a work in progress on my endeavor for my 250s to weigh in @ 250 grams AUFW including lipo.

Some of my friends has requested a trex 600 battery mount mod. Sp00fman, abletowinginc, Hellysmack, this is for you guys. It's still needs to be mounted, but you guys requested some pics as it progress to the finish product. I'm posting this here hopefully it will help others who may be interested or give some sort of working idea.

The adjustable extensions hasn't been installed yet, but with the adjustable extensions, my custom battery mount will give that added versatility to accommodate larger lipos.





Wiring still needs to be adjusted and shortened, this is just a working model. for now...
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Old 02-13-2011, 10:48 PM   #134 (permalink)
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Pitchup,
This is a great super light tray that may be suitable with a little shimming or filing:
http://www.infinity-hobby.com/main/p...oducts_id=4159

Amp
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Old 02-13-2011, 11:26 PM   #135 (permalink)
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CF tray most definitely.




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Old 02-16-2011, 03:02 AM   #136 (permalink)
 
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I don't want to brag, but after just finishing my CopterX 250 build with scorpion motor and esc, CC BEC, and Voltz 850 battery I come in at a fat 375 g!
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Old 02-16-2011, 07:14 PM   #137 (permalink)
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AUFW: 295 grams it lost a couple of grams with the trex 600 battery mod. wires still need trimming, i'll change the connectors to mini deans.The weight loss project still on going.

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Old 02-18-2011, 10:57 AM   #138 (permalink)
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With the scale fuselage and no battery, mine weights 1lbs 2.8oz.
3-cell battery weights 3.8oz.
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Old 02-19-2011, 11:31 AM   #139 (permalink)
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Quote:
Originally Posted by Marcwolf View Post
With the scale fuselage and no battery, mine weights 1lbs 2.8oz.
3-cell battery weights 3.8oz.
<metric_translation>
With the scale fuselage and no battery, mine weights 533g.
3-cell battery weights 108g.
</metric_translation>
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Old 02-20-2011, 07:50 PM   #140 (permalink)
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Quote:
Originally Posted by grumpy42 View Post
<metric_translation>
With the scale fuselage and no battery, mine weights 533g.
3-cell battery weights 108g.
</metric_translation>
Sounds more like 450 type weight :o

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