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Old 04-03-2005, 03:23 PM   #1
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Hello,

I currently have a futaba s3003 servo and it's too slow.

I'm looking at these AIRTRONICS:

94357 ERG-VR High Speed Dual Ball Bearing
2.12 oz
(60.2 g) 0.79 x 1.54 x 1.47 in
(20 x 39 x 37 mm) 100/125 oz-in
(9.0 kg-cm) 0.07 sec (AT 6.0V)
@ 60 deg Coreless, aluminum gear

and the

94257 ERG-ZR High Speed Metal Gear BB 1.80 oz
(51.1 g) 0.79 x 1.54 x 1.38 in
(20 x 39 x 35 mm) 110 oz-in
(7.9 kg-cm) 0.06 sec (AT 6.0V)
@ 60 deg Coreless, aluminum gears

btw this is for a tc3 b/c i'm looking for a faster servo

but the problem is that i don't know how many types there are i found somewhere 94357 Z.... (will it fit into my JR receiver?)
and i'm also planning to use it in my electric tc3 with 7.2V battery so would the same speed apply (those speeds are at 6.0V they say)??

i'd really appreciate it if someone who's familiar with these servos would help me.
Thanks!
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Old 04-03-2005, 04:04 PM   #2
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I would stay with JR since you are using a JR reciever.The JR DZ8450 is a great servo it's a digital servo and here are the specs

torque 98 oz @6v
wht 1.92oz
spd .08sec 60deg @6v
it's a dual ball bearing servo
they are around 115 to 130 bucks depends on where you go....

I have two of them one in a TC3 and one in my TC4 and have not had any problems with them......


But If you want to go with something else then the Airtronics servo you mentioned would be a good choice to....And yes they will work with a JR reciever.

Last edited by Jmccormick; 04-03-2005 at 04:14 PM.
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Old 04-03-2005, 05:19 PM   #3
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Just for your information and the fact I didn't find this out till later is that although you have a 7.2V battery your receiver which delivers power to your servos are only rated at 6.0V so the 6.0V rating is what you get.....Now for servos I have used the 94357 it is a great servo and would still be in my car except I found one better and for the price & it is digital unlike the 94357 and I haven't found a single problem with it yet and that is the Ko Propo PDS 2343. There is a Ko Propo USA so yes you can get service if anything happens.
With the choices you have given I would say the 94357.
Hope this helps,
Stephen <><
PS I have a 94357 as a back up if something happens at the track.
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Old 04-03-2005, 05:22 PM   #4
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Thanks a lot guys, this really helped me
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Old 04-03-2005, 05:33 PM   #5
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what you could do with standard servos (cheap to replace i bought 8 for 15)

take out the red wire from the connector on the servo lead. solder this loose end to the poistive battery cable, you will notice a significant increase in speed and torque. as long as you have your servo saver set up correctly it will last for ages. mine used to last around 5-6 months, if it makes noises when idle, this is normal
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Old 04-03-2005, 06:03 PM   #6
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If you wire the servo to the positive battery post, then I would recommend using a large capacitor, as some servos will jerk to one side (glitch) if the voltage drops.

Also, if your esc has an FET lead, then you can wire it there instead.
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Old 04-03-2005, 07:21 PM   #7
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Quote:
Originally posted by Mr. Shookie
Just for your information and the fact I didn't find this out till later is that although you have a 7.2V battery your receiver which delivers power to your servos are only rated at 6.0V so the 6.0V rating is what you get.....Now for servos I have used the 94357 it is a great servo and would still be in my car except I found one better and for the price & it is digital unlike the 94357 and I haven't found a single problem with it yet and that is the Ko Propo PDS 2343. There is a Ko Propo USA so yes you can get service if anything happens.
With the choices you have given I would say the 94357.
Hope this helps,
Stephen <><
PS I have a 94357 as a back up if something happens at the track.
hi shookie, what do we look when we choose a servo?? thanks.
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Old 04-03-2005, 10:49 PM   #8
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Quote:
Originally posted by EngTat
hi shookie, what do we look when we choose a servo?? thanks.
what you want to look? izzit the servo pretty or not? hahahar common sense lar eng tat. the most latest servo the best if not what for the factory will keep on update these stuff. hahahahr
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Old 04-03-2005, 11:02 PM   #9
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shoot me like that meh? no lah just wandering wich brand is the most popular
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Old 04-04-2005, 12:00 PM   #10
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I like KO PROPO
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Old 04-04-2005, 12:22 PM   #11
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Eng Tat propo racing servo is the most popular currently fully titanium parts very light hahahahr
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Old 04-04-2005, 08:08 PM   #12
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ok one more question:

i thought that there were two versions of the 94357 servo:
the regular 94357 and the 94357Z

but someone was refering to the servo as "high torque 94357" is there such thing or not??

anyways, is there a big difference between the two??

thanks again

again, i will use this servo in my tc3, for steering of course
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Old 04-04-2005, 10:40 PM   #13
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Futaba 9550 or the Futaba 9451 great servos,great prices.The 9451 is about $80,.10 on the speed,120 oz on the torque,The 9550 has close to the same numbers on the speed a bit less on the torque but it's smaller in size,just as wide as a regular servo but shorter.In a TC3 or 4 it works great gives you some more room for your reciever and speed controler.and Futaba makes great servos,so does KO,JR and Airtronics.
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Old 04-04-2005, 10:52 PM   #14
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Quote:
Originally posted by xxxkat
Futaba 9550 or the Futaba 9451 great servos,great prices.The 9451 is about $80,.10 on the speed,120 oz on the torque,The 9550 has close to the same numbers on the speed a bit less on the torque but it's smaller in size,just as wide as a regular servo but shorter.In a TC3 or 4 it works great gives you some more room for your reciever and speed controler.and Futaba makes great servos,so does KO,JR and Airtronics.
hi i did consider the fut9550, how about the ko2363 are they in the same category?
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Old 04-04-2005, 11:10 PM   #15
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The KO is an fet servo it has good numbers .08 on the speed and 111 oz-in on the torque, it is $140.. You can get the same numbers(well close to them)From Futaba with the 9451 .10 on the speed and 121 oz-in for $75 I know what my pick is..
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