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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 09-18-2009, 07:44 AM   #1
shootmeink
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Default TRex 450 tail servo

I just finish rebuilding my trex 450 after a stupid indoor crash that cost me 12 stitches on 3 fingers. I finally got it airborne and was pretty confortable with it. doing pattern small aeros. But yesterday, I applied full rudder for 5 sec so the chopper spinned and when I applied opposite rudder to stop the rotation, the heli keeped spinning in the wrong direction. I managed to crash on a small piece of grass. Anyway I was using this http://www.hobbycity.com/hobbycity/s...idProduct=6314
servo on the tail.

I call my local Hobby Shop and the guy told me that this servo is garbage and that I need a .06-.07 sec tail servo.
Here's my config:
Trex450 SE V2
Telebee GR302-AD Gyro http://www.hobbycity.com/hobbycity/s...idProduct=8471
ESC: HobbyWing Pentium 40A http://cgi.ebay.com/Hobbywing-Pentiu...d=p3286.c0.m14
I've seen a lot of servo that looks ok but I wanna make sure I get the right one. I dont want to go in the tooo expensive stuff.
Thx guys

Last edited by shootmeink; 09-18-2009 at 09:36 AM..
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Old 09-18-2009, 08:54 AM   #2
snjbird
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The new sport kit comes with a DS420 servo for the tail, I have seen Bert Kammerer tear the field up with that combo...
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Old 09-18-2009, 09:15 AM   #3
siconic
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Default Me too...

I want to know if there is a good digital tail servo that operates at 6v or some way to step down the stock align 35 esc for the rudder servo only. I have been checking into the S9257, but I like hitec, and the S9257 only operates at 4.8v. Any suggestions? It will be going on a GY-520 gyro, a trex 450, 2.4ghz radio.
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Old 09-18-2009, 09:21 AM   #4
markleyland
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Futaba 9650 or 9257. I bought the gears for the 9650 to converted it into a 9257. Used to be what everyone swore by on here when I joined and I've never looked back.
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Old 09-18-2009, 09:37 AM   #5
shootmeink
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Quote:
Originally Posted by snjbird View Post
The new sport kit comes with a DS420 servo for the tail, I have seen Bert Kammerer tear the field up with that combo...
It says in the specs that its suitable for Trex250. I have a 450.
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Old 09-18-2009, 09:41 AM   #6
markleyland
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9650 = 6v
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Trex 450 SE V2: 9257 tail, Spartan Quark, HS65mg cyclic, DX7-AR7000, NEU 1107h/2y, Jazz Esc,
Trex 550 FBL: Jive 100+LV, KDE/NEU 1907H/1/N42, Vbar 5.3, Futaba BLS 251
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Old 09-18-2009, 09:42 AM   #7
shootmeink
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Quote:
Originally Posted by markleyland View Post
9650 = 6v
So does it means it will fit with my setup(ESC, Gyro, etc...)
Sorry I'm a beginner
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Old 09-18-2009, 09:53 AM   #8
onemorecrash
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yes it will I am using a 9650 with the gy401 clone gyro.
and it holds great. very happy with it.
and the the servo works on 6v with out the need for a step down.
when it comes to the tail servo buy cheap and youll regret it.
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Old 09-18-2009, 10:54 AM   #9
shootmeink
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the 9650 is
SPEED: .14 sec/60 @ 4.8VSPEED: .11 sec/60 @ 6V
kinda slow ain't it?
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Old 09-18-2009, 10:58 AM   #10
crypto666
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+1 on cheap is more expensive in the end.

I was looking at the ds420 myself to replace my Logitech 3100, but it was recommended to go with the ds520; some say the 420 is not enough for hard flights on a 450. They both run at 6V.
I went with the DS520 and it rocks. It rarely gets warm and combined with increased head speed it has been the end to all of my tail worries.
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Old 09-18-2009, 11:04 AM   #11
markleyland
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Quote:
Originally Posted by shootmeink View Post
the 9650 is
SPEED: .14 sec/60 @ 4.8VSPEED: .11 sec/60 @ 6V
kinda slow ain't it?
Compared to what? And can you really tell the difference?

All depends on what you want to spend I guess, but all I can say is that the 9650 (now with the 9257 gears) has never let me down and runs at 6v.
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Trex 550 FBL: Jive 100+LV, KDE/NEU 1907H/1/N42, Vbar 5.3, Futaba BLS 251
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Old 09-18-2009, 11:25 AM   #12
crypto666
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Quote:
Originally Posted by shootmeink View Post
the 9650 is
SPEED: .14 sec/60 @ 4.8VSPEED: .11 sec/60 @ 6V
kinda slow ain't it?

You need to take torque into account as well. If it is slower, does it have more torque? If so, you can run a longer stroke on the servo that will greatly increase your speed.
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Old 09-18-2009, 12:24 PM   #13
snjbird
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Quote:
Originally Posted by shootmeink View Post
It says in the specs that its suitable for Trex250. I have a 450.
Align is selling them with the 450 Sport combo... I have seen the servo work awesome on Bert's 450 Sport, I mean AWESOME!
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TOY BOX contents Mcp x, 450 Pro VBar, 500 VBar, 12S 600CF VBar... Mikado Logo 6003D VBar Proudly flying KBDD, MKS, Castle, Scorpion and some planks too
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Old 09-18-2009, 12:50 PM   #14
shootmeink
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I finally made my decision guys and I bought a DS520 @ 45US$
I wanna thank you all for your help
I always refer to this web site for answers.
Have a great day flying!
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Old 09-18-2009, 02:30 PM   #15
Wolfpackin
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Quote:
I want to know if there is a good digital tail servo that operates at 6v or some way to step down the stock align 35 esc for the rudder servo only. I have been checking into the S9257, but I like hitec, and the S9257 only operates at 4.8v. Any suggestions? It will be going on a GY-520 gyro, a trex 450, 2.4ghz radio.
Hitec HSG-5084MG
Faster and more torque than the S9257, no issues on 6V.
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