Servos for my buggy

[NitroChris]

My Hitec 645 servos are giving me a headache! They just keep breaking...
if its not the gears its the electronics inside them that breaks.
So I thought it is time to buy a set of new servos.

What do you guys recomend?

Just dont say Hitec...

Oh yeah, I have a Airtronics M8 radio.

Thanks!
//Chris

 

[HumboldtBlazer]

I have to say these are the Mercedes Benz of servos,and if you want quality+ and durability to spare then I highly reccomend these. They are not for the budget hobbiest and many other brands are good and will doo for cheaper.

http://horizon.hobbyshopnow.com/products/description.asp?Prod=JRPS8417

Features
250 Hz pulse rate (vs.50 Hz for standard servos)
The ideal tail rotor servo.
Standard size case that fits nearly anywhere.
The highly efficient digital amplifier has only a slightly higher current drain (approximately 8% more than a conventional servo under a given load) despite its radically increased performance.
Hardened steel & brass gear train that's virtually unstrippable.
Rock solid holding power.




http://horizon.hobbyshopnow.com/products/description.asp?Prod=JRPS8411

For giant scale and precision competition airplanes, JR’s DS8411 servos are the ultimate choice thanks to their high output torque and incredible accuracy and holding torque. To transfer all that available power to the servo arm, JR’s DS8411 features a composite metal gear train that includes a combination of hard anodized hardened steeland brass gears that are virtually unstrippable. This combination of metals gives a long, backlash-free gear life. In addition, ball bearing spacing on the output gear has been significantly widened, offering greater radial output play and further improving accuracy.

JR’s digital amplifier, developed in cooperation with the electronics giant Mitsubishi, features a high frequency 250Hz pulse rate (the number of times per second the amplifier sends power to the motor) versus the 50Hz pulse rate of conventional servos. This provides quicker response and gives up to 5 times greater holding power

Features
For airplane use only.
A whopping 155 oz./in. of torque .
Standard size case that fits nearly anywhere.
Increased resolution of 5900 steps per 120 degrees and a less than 1 ms deadband for extreme accuracy.
The highly efficient digital amplifier has only a slightly higher current drain (approximately 8% more than a conventional servo under a given load) despite its radically increased performance.
Hardened steel & brass gear train that's virtually unstrippable.
Rock solid holding power.


Specifications
Torque: 155 oz/in
Speed: .18 sec/60°
Weight: 2.03 oz
Size: 0.75 x 1.54 x 1.36 in
Ball Bearing: dual wide spaced
Motor: coreless

 

[Çh®i§tiªñ]

Futaba here:

http://www.servocity.com/html/s9350_hi-torque_steering.html

Check out Servo City - you will find some good deals there now as well as whats coming in will be sweet as all hell. Check out the comparrison charts to find the speed/strength you are looking for.

 

[FlyinRazorback]

Those are nice servos HB but the transit time is too slow. I run Futaba 9450's on my throttle servo for my truggy and my X5. For steering on my X5 I use Airtronics 94758 and for my truggy I use Airtronics 94757

Hard to find a better servo for steering with unbelievable transit time and torque.

 

[NitroChris]

Thanks for the into guys!

 

[alkyula]

do i need a special RX/TX to run digital servos? that Airtronics 94757 servo has some nice specs!!

 

[FlyinRazorback]

alkyula,
No, you won't need special rx to run digitals. One thing to watch for though with digitals is it will run your battery down a little quicker. Not really a big deal unless you run 45-60 min. mains. The longest main I've raced in was 30 mins and the 1100 battery pack finished it easily.

 

[alkyula]

thx FRB, yes I've read elsewhere on these forums that digitals suck up juice faster than other servos. I'm thinking about getting that servo now for my storm pro which will be here friday....i was going to get another servo that had 135 Tq but only 20" transit, didnt know you could have speed and torque! BTW i chose an airtronics MX-3 radio, it was only 104$ and my friend has one and i like it. crap I'm goin outa topic..peace

 

[HumboldtBlazer]

Originally posted by FlyinRazorback
Those are nice servos HB but the transit time is too slow. I run Futaba 9450's on my throttle servo for my truggy and my X5. For steering on my X5 I use Airtronics 94758 and for my truggy I use Airtronics 94757

Hard to find a better servo for steering with unbelievable transit time and torque.

Really? At a .10 second 60° transit time, the DS8417 is JR's fastest-ever servo.

isn't that .06 seconds?

where you talking about the steering servo?

 

[FlyinRazorback]

Sorry bout that. I was reading the specs on the second one. They are both great servos. The airtronics is a little faster, with a little more torque, and costs about $5 less.

JR DS8417
Torque: 82.0 oz/in
Speed: .10 sec/60°
Weight: 2.03 oz
Size: 0.75 x 1.54 x 1.36 in


Airtronics 94758Z
Torque: 115.0 oz./in
Speed: .06 sec/60°
Weight: 2.12 oz.
Size: 1.54 x 0.79 x 1.47 in

 

[HumboldtBlazer]

that is a nice servo!

Horrizon list is always high is what I have found also.

 

[HumboldtBlazer]

One thing I found out about my servos FRB is that my rating is at 4.8V and your Airtronics is rated at 6.0V, my transit time goes down to .07 sec @ 60 degrees and my high torque is .14 seconds, just found this out that you have to compare voltage with voltage of the same as both brands are slower @ 4.8V when compared to 6.0V just something I didn't know. See learning about electrics is helping me in my nitros too.