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Old Jan 20, 2011, 10:30 PM
Cereal Killer.
branflake12's Avatar
USA, IA, Iowa City
Joined Jun 2009
701 Posts
Thanks for the link. Ill probably still use the little 919 for a bit in some hover tests and maybe some piro stops and see if i think the gyro has potential. if I like it, Ill probably put an ino lab 261 on it like my outrage heli (great tail servo), but not sure what i would go with if it ends up on a t250.
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Old Jan 20, 2011, 10:48 PM
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CHINA
Joined Apr 2005
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Quote:
Originally Posted by branflake12 View Post
Thanks for the link. Ill probably still use the little 919 for a bit in some hover tests and maybe some piro stops and see if i think the gyro has potential. if I like it, Ill probably put an ino lab 261 on it like my outrage heli (great tail servo), but not sure what i would go with if it ends up on a t250.
from Helifreak,by Fast400

Quote:

the 919 is too small, it does not have the centering hold like a tail servo, nor does it support a gyros frame rate. its a cyclic servo, it is not design as a tail servo.

if you are only doing scale type flying you`ll be ok, BUT hard pyro type stops will burn out the very small motor.
if you get major bounce back, poor tail hold because the gains is to low to avoid wag, then you`ll know the difference between a cyclic servo and a gyro servo.

a servo to be used with a gyro has a (G) at the end of the description, or it states suitable for gyro use.
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Old Jan 20, 2011, 11:23 PM
Barnwell, SC
Barnwell, SC
Joined Sep 2004
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[QUOTE=ASSAN;17166475]
Quote:
Originally Posted by branflake12 View Post

I was looking for a tail servo that would work on my 450 QUOTE]

you can try this, GS D9257.

http://www.nitrodude.com.au/catalog/...oducts_id=7857

the price there maybe not right.i think you can find cheap in other shops. pay attention,the GS D9257 have two types, one is 1520us,another is 760us.

one of our team pilot think this servo is better than DS520.

meng
How the heck too tell which I have? Both have same product number:

http://www.made-in-china.com/showroo...GS-D9257-.html

http://www.made-in-china.com/showroo...GS-D9257-.html
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Old Jan 20, 2011, 11:30 PM
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CHINA
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i realize compare with the old cheap gyros, GA-250 need more fast speed/more torque tail servo to anti bounce.that's a different from your experience before.

GA-250 is cheap,but with some features only happened in an advanced gyro's.

that is the problem. i see.

meng
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Old Jan 20, 2011, 11:32 PM
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[QUOTE=hfenn;17167829]
Quote:
Originally Posted by ASSAN View Post
first one say it's 760us,second is 1520us.

meng
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Old Jan 21, 2011, 08:53 AM
Barnwell, SC
Barnwell, SC
Joined Sep 2004
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[QUOTE=ASSAN;17167901]
Quote:
Originally Posted by hfenn View Post

first one say it's 760us,second is 1520us.

meng
Yes I know, but I bought one of these from HK and nowhere on the package or servo does it identify the one I have. HK website says 1520us, but since the supplier has the same product number on both servos, how could a user tell which one he has? I have two of your gyros on the way to me, and the first will try on 450 size with one of these GoTeck servos.
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Old Jan 21, 2011, 11:04 AM
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I just bought one of these:



http://waterandairhobbies.com/produc...roducts_id=862

it is a 9257 clone. handles 1520/333.
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Old Jan 21, 2011, 11:40 AM
Go Leafs Go!
Fantam's Avatar
Georgetown,ON,Canada
Joined Jan 2002
262 Posts
I just received my GA250. I am thinking of using a Henge 922 servo with it. I have searched and can't find which setting to use. Is it 1520/333 or 1520/250? I know it is 1520 but I can't find info on the 333 vs 250.
thx
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Old Jan 21, 2011, 01:09 PM
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Bundesrepublik Deutschland, Rheinland-Pfalz, Kaiserslautern
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Found the link again! Here:

http://www.rcgroups.com/forums/showt...1360019&page=2

274Hz max for the 922.
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Old Jan 21, 2011, 01:13 PM
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there is a report on helifreak that it works at 270 hz, so start with 250.

http://www.helifreak.com/showthread.php?p=2469947

if it dies at 333 hz, then you know it can't handle it.

edit:

there you go!
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Old Jan 21, 2011, 04:10 PM
Looptastic!
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Enschede, Netherlands
Joined Nov 2009
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The go-tech 9257 26g mini servo from HK works pretty well. That was on my bird in video 1 and 2. Now i have the emax back on, wich was working a tad better on the 401B, but worse on the GA-250.
The go-tech is a great fast and strong servo for just $10.
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Old Jan 21, 2011, 04:38 PM
Go Leafs Go!
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Georgetown,ON,Canada
Joined Jan 2002
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thanks for the info on the D922. I will try it at 250 first. I also have a brand new, never used go-tech 9257 from HK. Which of the two is the better bet to try first? On HK's review page for the 9257 clone a lot of people commented on how fast it burns out so I am a bit wary to use it.
thx
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Old Jan 21, 2011, 06:59 PM
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Australia...we live inverted.
Joined May 2008
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For those runnning 20 odd gram servos...
Ino 261 would be on my shortlist: http://www.hobbycity.com/hobbycity/s...dproduct=10522

Or

http://www.mks-servo.com.tw/goods.php?goods_id=ds95i (not sure if the GA250 can run this though)

Amp
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Old Jan 21, 2011, 07:06 PM
AMA # 949551
rikybob's Avatar
USA, FL, Orlando
Joined Oct 2009
2,195 Posts
Interesting.....

From Spartan's site.

A little insight on servos.

b

Excerpt: • Other than the few exceptions listed below the majority of modern digital servos will happily work at 1520uSec/333Hz.
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Last edited by rikybob; Jan 21, 2011 at 08:15 PM. Reason: To be clear!
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Old Jan 21, 2011, 07:14 PM
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pitchp's Avatar
Australia, VIC, Melbourne
Joined Aug 2010
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Quote:
Originally Posted by Fantam View Post
thanks for the info on the D922. I will try it at 250 first. I also have a brand new, never used go-tech 9257 from HK. Which of the two is the better bet to try first? On HK's review page for the 9257 clone a lot of people commented on how fast it burns out so I am a bit wary to use it.
thx
i'd open the 9257 case, make sure nothing is binding or rubbing against the case.

I'd try the 9257 @ 1520-333hz
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