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Old 12-15-2007, 12:52 PM   #16
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Originally Posted by Marcos.J View Post
for what car? 200mm? 1/8th scale?
He has a 200mm sedan.
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Old 12-15-2007, 12:57 PM   #17
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The only problem with the heat sink cases is they weigh a lot.

For 1/10th sedan: If you are buying a new servo, try the Futaba S9452. If looking for a used one then look for the S9451. They are basically the same, but the 9452 is smaller and lighter.

The airtronics 94357 is a good servo also as well as its heat sink case version.
With a steering servo (lay down) I have always been concerned that with an aluminum case the heat sink might work against the servo. If it lays on the chassis, and the chassis warms up, the servo case might be a heat sink for the chassis instead of the other way around. All I know is I have never owned a heat sinked version of my servos and so far I have not had a failure. The futaba digitals are good servos, and the pricing at Tower Hobbies is very good compared to their competition.

Watch out for the coming S9551!!
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Last edited by Scott Fisher; 12-15-2007 at 03:28 PM.
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Old 12-15-2007, 01:15 PM   #18
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Watch out for the coming S9551!![/QUOTE]

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Old 12-15-2007, 02:22 PM   #19
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I have had excellent results with the hitec HSC-5997TG for steering. It more torque than some of the others mentioned here at a sacrifice of a little speed. For steering, you need a servo with some decent torque numbers because all that front drivetrain spooled up to 60 mph diving into a sweep gets pretty hard to turn. I usually use a Hitec HS-6985HB for throttle with good results. this servo has the Karbonite gears. The only problem with the 6985 is it is evidently a pretty popular servo and is backordered alot.
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Old 12-15-2007, 02:57 PM   #20
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Originally Posted by Scott Fisher View Post
The only problem with the heat sink cases is they weigh a lot.

For 1/10th sedan: If you are buying a new servo, try the Futaba S9452. If looking for a used one then look for the S9451. They are basically the same, but the 9452 is smaller and lighter.

The airtronics 94357 is a good servo also as well as its heat sink case version.
With a steering servo (lay down) I have always been concerned that with an aluminum case the heat sink might work against the servo. If it lays on the chassis, and the chassis warms up, the servo case might be a heat sink for the chassis instead of the other way around. All I know is I ahve never owned a heat sinked version of my servos and so far I have not had a failure. The futaba digitals are good servos, and the pricing at Tower Hobbies is very good compared to their competition.

Watch out for the coming S9551!!
Yeah Scott the 9451 or 9452 look good 1.0 speed and 120 oz torque @6.0v plus its digital I found them for$75.00 [email protected] servocity.com. Thanks for all of the suggestions.
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Old 12-15-2007, 02:57 PM   #21
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Quote:
Originally Posted by Scott Fisher View Post
The only problem with the heat sink cases is they weigh a lot.

For 1/10th sedan: If you are buying a new servo, try the Futaba S9452. If looking for a used one then look for the S9451. They are basically the same, but the 9452 is smaller and lighter.

The airtronics 94357 is a good servo also as well as its heat sink case version.
With a steering servo (lay down) I have always been concerned that with an aluminum case the heat sink might work against the servo. If it lays on the chassis, and the chassis warms up, the servo case might be a heat sink for the chassis instead of the other way around. All I know is I ahve never owned a heat sinked version of my servos and so far I have not had a failure. The futaba digitals are good servos, and the pricing at Tower Hobbies is very good compared to their competition.

Watch out for the coming S9551!!
I agree that the Futaba S9451 is a great servo that was my first servo I bought 3yrs ago I'm still running the same servos this year. can't go wrong with these servos.
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Old 12-15-2007, 05:43 PM   #22
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Go for the Futaba BLS451 Digital Brushless servo, you get the advantage of precise digital servo without the big current drain of the brushed motor digital servo.(current drain of a digital brushless servo is comparable to an analog servo)
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Old 12-15-2007, 07:02 PM   #23
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Originally Posted by Team Kamikaze View Post
Go for the Futaba BLS451 Digital Brushless servo, you get the advantage of precise digital servo without the big current drain of the brushed motor digital servo.(current drain of a digital brushless servo is comparable to an analog servo)
Looks like it will be a good servo, but it does cost quite a bit more, they aren't available yet, and it weighs a bit more than the S9452. Just have to decide if it is worth it.
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Old 12-15-2007, 07:26 PM   #24
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Originally Posted by Scott Fisher View Post
Looks like it will be a good servo, but it does cost quite a bit more, they aren't available yet, and it weighs a bit more than the S9452. Just have to decide if it is worth it.
I have been selling them for about 6 months already and they are less than a $100.00.
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Old 12-15-2007, 07:57 PM   #25
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Quote:
Originally Posted by Team Kamikaze View Post
I have been selling them for about 6 months already and they are less than a $100.00.
Servo is not on your website right now. Through GP I have not seen it available, and it is 25% more money than the 9451/9452. Still might be the way to go in my future. Either way, I am waiting on the S9551. Less money, more torque, and 5-10 grams lighter. A touch slower though.
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Old 12-16-2007, 10:58 AM   #26
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Originally Posted by Team Kamikaze View Post
Go for the Futaba BLS451 Digital Brushless servo, you get the advantage of precise digital servo without the big current drain of the brushed motor digital servo.(current drain of a digital brushless servo is comparable to an analog servo)

And whatever you do, dont fall for the digital servo high current draw myth. Most digital servo specs will bear this out. Testing I have done over the years shows that most analog sevrvos will draw around 1 amp cycling the throttle and steering. Digitals are usually around 1.3- 1.4 amps, yes more but a really insignifigant amount considering the current high capacity RX batteries now available. Benefits of digital far outweigh the additional .4 amp draw. One caviat to this......if any part of your linkage is binding digitals WILL draw signifigantly more current than analogs trying to move the binding. Yet you can be driving around oblivious to the linkage problems because the digitals torque does an excellent job of masking any binding in the linkage. If you run digitals and your linkage gets wadded in the middle of a race, your RX battery can get crowbarred into submission before race end and you will never notice any difference in steering.
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Old 12-16-2007, 11:03 AM   #27
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Do you consider $100+ servo expensive or peace of mind ?
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Old 12-16-2007, 11:47 AM   #28
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Do you consider $100+ servo expensive or peace of mind ?

I don't know if you are asking me or not, but I think $100 is expensive if you are talking about a servo that performs like a 9452 or a 9551. The futaba digitals have proven to be a good servo so I think they set a new level of expectation. While I would expect a brushless servo to draw less power and the motor to last longer, neither of those things are issues to me at all. The brushless servos also seem to be quite a bit heavier than the 9452/9551 but will certainly lighten your wallet.
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Old 12-16-2007, 12:55 PM   #29
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JR 8711 is the servo that would assure good steering.
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Old 12-16-2007, 01:00 PM   #30
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to JVSTRAT's point, in have seen several people at local races that do not set their end point adjustment correctly...or don't set the end point adjustment while the dual rate is at MAX.

This will put significant strain on the rx battery and can kill servos.
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