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


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Old 09-25-2009, 11:54 PM   #1 (permalink)
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Default Best possible servos for the T-250

Hi guys,

I have the super combo with the stock align servos. I'm thinking about upgrading, but am not sure what the best servos are for this bird. Any suggestions? I'm looking for both tail and cyclic. Thanks!
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Old 09-26-2009, 09:45 AM   #2 (permalink)
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hs-65mg!!!
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Old 09-26-2009, 10:44 AM   #3 (permalink)
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Quote:
Originally Posted by marcrc1997 View Post
hs-65mg!!!
What do you thimk about 5065MGs? Is it worth the $$$ to go digital?
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Old 09-26-2009, 11:20 AM   #4 (permalink)
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If it were me, I would do the 5065's for cyclic and a 5084 for the tail. 5083 if your gyro is capable.
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Old 09-26-2009, 11:21 AM   #5 (permalink)
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I would put DS 285 MG's in it, if I were going to upgrade.

When the Align servos go in mine, this is what I plan to do.
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Old 09-26-2009, 12:37 PM   #6 (permalink)
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I haven't heard much about the 285's but i know for sure that you will be very happy with either the 65mgs or the 5065mgs.
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Old 09-26-2009, 06:36 PM   #7 (permalink)
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I think the stock Align cyclic servos (not tail) are actually quite good.
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Old 09-26-2009, 09:49 PM   #8 (permalink)
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The stock Align servos are pretty good, but are not as accurate as the JR's, IMHO.

I am fine with them for the time being.
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Old 09-27-2009, 05:09 AM   #9 (permalink)
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Hyperion DS09 scd for cyclic and GMD for the tail.
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Old 09-27-2009, 01:58 PM   #10 (permalink)
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I would use the JR DS287 MB servos for cyclic.
http://www.readyheli.com/Combo_of_3_...287mgcombo.htm

And the JR DS290G for the tail servo.
http://www.readyheli.com/JR_DS290G_D...p/jrps290g.htm

Or maybe the JR DS3500G tail servo.
http://www.readyheli.com/DS3500G_Ult.../jrps3500g.htm

Maybe this combo then if you need a gyro also...
http://www.readyheli.com/Ready_Heli_...500g_ds760.htm

I really like JR servos, use the JR DS285MG on my 450SE V2.

/ Stolpe
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Old 09-27-2009, 04:41 PM   #11 (permalink)
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Default ah servos.

I'm using the ds290g (that's almost default for the 250) . and i in-joy it, im getting a bit of gain wag but that's not servo related. align and other sites are promoting the DS420 (K10444A) if you want the P#. it's cheap to $28 for the tail.

but....
DS290G PART#JRPS290G $35
Key Features
- Perfect for micro-heli tail rotor up to 450-size helis
- Ultra-fast transit time for superb response
- Zero dead band provides JR's legendary precision
- High frequency digital electronics
- Size Category:Minis and Micros
- Typeigital
- Torque:13 oz/in @ 4.8V. 16 oz/in @ 6V
- Speed:.08 sec/60. .07 sec/60 @ 6V
- Dimensions (WxLxH):.45x.87x.85
- Weight:.25 oz
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Old 09-27-2009, 07:08 PM   #12 (permalink)
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I don't think servos are the 250s biggest problem, it is more like the slop in the head! I have a DS3500G on the tail, tried three servos there and the 3500 works the best!

DS290 G OK better that DS420
S9257 good
DS3500G best
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Old 09-28-2009, 07:30 AM   #13 (permalink)
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I use DS285 upgraded to metal gears. These servos use the standard JR servo arms, so I'm using 450 sized ball links at the servos ( the 450 balls an links fit the 250 pushrods).


I'm also using the 3500G servo for the tail.



I like this setup so far.



BTW.... the use of a ball link sizing tool really improves the way this machine flies!
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Old 09-28-2009, 08:55 AM   #14 (permalink)
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Are you guys seriously using a 27 gram servo on a 250 class heli? (I'm not trying to be a smart ass I'm just asking). The JR DS3500G is normally a 500 class heli servo.
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Old 09-28-2009, 09:01 AM   #15 (permalink)
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"The JR DS3500G is normally a 500 class heli servo."

I am running this servo on my 250 and two or three of my 450's on the tails.

Although you can, I would not run anything this small on my 500 tail-I have an 8900G on that.


It does look huge on the 250, but it works much better than the 290, which I tired first.
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Old 09-28-2009, 09:01 AM   #16 (permalink)
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The T-Rex 250 tail needs the highest quality servo you can fit to fly decently.


I'd rather have my 250 15-20 grams heavier and fly decently, than having lighter and fly like crap.


Don't know if you own a 250, but if you look at all the different threads about it, you'll see that a lot of people solved their tail problem by using this servo (along with a few other mods).
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Old 09-28-2009, 12:11 PM   #17 (permalink)
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Quote:
Originally Posted by Maxime30 View Post
The T-Rex 250 tail needs the highest quality servo you can fit to fly decently.


I'd rather have my 250 15-20 grams heavier and fly decently, than having lighter and fly like crap.


Don't know if you own a 250, but if you look at all the different threads about it, you'll see that a lot of people solved their tail problem by using this servo (along with a few other mods).
I think the days when the majority recommended huge servos faded away. With chinese weights and spacers, you can do very well with a 290 or similar servo. Something like the 9257/9650/3500 will throw your CG to the rear and one side pretty badly, and you'll either have to put all your electronics on the other side and use a heavier battery or use trim. Either way, I don't think it's worth it anymore when you can lighten the load on the tail servo and use a normal size.
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Old 09-29-2009, 07:15 AM   #18 (permalink)
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True, but I already had the 3500 and didn't want to spend more time (and money) pucking around with chinese weights, buying another servo, and other modifications etc.


Now my 250 flies decently (with the 3500 ) and I'm happy with it.


If I was a top 3D pilot, probably I'd spend the money to lighten the helicopter a bit, but for my level of flying, the 3500 is a viable alternative.
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