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Old 04-26-2009, 08:45 AM   #1
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Default HS-645MG servo for truggy brake

Has anyone used the Hitec HS-645MG servo for truggy brake. Losi 8T 2.0 is what it will be fore?

Im looking for an inexpensive solution for brakes for a truggy.

thx
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Old 04-27-2009, 08:12 AM   #2
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Default Good Servo

That is a good budget servo. I have one on my STRR and it works fine, but when I get to the states and start club racing I will upgrade to a digital one just cuz.
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Old 04-27-2009, 08:18 AM   #3
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will it make any difference between this one and a higher end one? im wondering the lag response of braking since this servo is so slow. also, i can connect this servo directly to lipo. that's 8.4 - 7.2v. that will boost it a little.

thx
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Old 04-27-2009, 08:29 AM   #4
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They are okay. I 3 broken ones in my box right now! LOL. They are on the slow side and not real durable. You should be okay for now as long as your linkage is perfect and not overstressing the servo. I highly doubt it will handle straight lipo for long if at all. Spend a little more and get the Ace/AE 1313 and never look back.
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Old 04-27-2009, 08:30 AM   #5
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note, this is for braking only... i have good servos for steering...
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Old 04-27-2009, 08:35 AM   #6
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Way too slow for throttle. The motor is gonna feel sluggish. I ran a 645 in my buggy for about half a season before ponying up for something better. And by "better" I mean a .10 sec transit time compared to the 645's .20 sec transit time.

.1 seconds is the blink of an eye, right? Well, it was a night/day difference in throttle response. It was like having a a brand new motor in that thing.
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Old 04-27-2009, 08:37 AM   #7
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actually, it's not for throttle neither :0) braking only. im running electric 1/8th truggy with manual brake. so, the ONLY purpose for this servo is for braking. no steering and no throttle.
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Old 04-27-2009, 08:42 AM   #8
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You should be okay. It just isn't the most durable servo.
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Old 04-27-2009, 08:45 AM   #9
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Quote:
Originally Posted by slaytanic View Post
You should be okay. It just isn't the most durable servo.
i see... im consider taking it up a notch. if i was, what would u guys recommend without doubling the price. i jus don't wanna spend 70 to 100 bucks JUST for braking...
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Old 04-27-2009, 08:52 AM   #10
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I use to use those servos and then I went to a JR st126 they are a lot faster for the same price and they last for a long time I use them for t/b in my truggy and use both in the buggy. I love them.
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Old 04-27-2009, 09:07 AM   #11
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The only reason to stay with that servo is since it is for braking and nothing else it would be ok. The delay wouldn't be to bad since you are Elec and you can put program some drag brake in the esc to offset the delay from the servo.

It may be cheap, but it is HITEC and they are the best when it comes to customer service, so if it brakes you can get it fixed no problem.
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Old 04-27-2009, 09:08 AM   #12
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Quote:
Originally Posted by smittyusmc View Post
I use to use those servos and then I went to a JR st126 they are a lot faster for the same price and they last for a long time I use them for t/b in my truggy and use both in the buggy. I love them.
looks good
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Old 04-27-2009, 10:55 AM   #13
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I would leave the JR 126 alone. They do have a good 3 year warranty and are cheap but I have been having trouble with them going out on my brakes/throttle.
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Old 04-27-2009, 11:04 AM   #14
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Since you don't need throttle, just use the 645MG but use a hole closer to the center on the horn for more leverage, and turn up the expo to speed it up.

edit: but I will say it's still not going to compare to a HS7955TG on 2s lipo. The 645MG is just more doggy..
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