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Hitec HS-645MG

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Old 07-20-2004, 01:52 PM
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dany_maia
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Default Hitec HS-645MG

Hello.
What do you think of the quality of this servo? How does it compares to a futaba servo with the same torque, because it´s much cheaper? Will a NiCd 1000 mA pack handle it?

Thanks in advance:
Daniel Maia
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Old 07-20-2004, 02:46 PM
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Default RE: Hitec HS-645MG

I have been using them for quite some time and I find them to be a very good high torque standard class servo. They are not as precise or dont center quite as well as a coreless servo but they have done a pretty good job for me. I have been flying them in a 50cc sized GP patty wagstaff for some time and I have used the 625's in an ultimate. The 1000 ma should be OK depending on how many servos your talking about driving as long as you dont plan on more than 4- flights per charge and your not using more than 5 of them
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Old 07-20-2004, 02:50 PM
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Default RE: Hitec HS-645MG

Thanks for your fast reply.
And how HS-625MG compare to HS-635HB? Are the 635HB coreless?
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Old 07-21-2004, 06:35 PM
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Default RE: Hitec HS-645MG

I have Hitec servos in a few of my planes.. 605's, 615's, 645's, so far so good. Reasonable price..I've been fortunate...or it's a good product for the most part...but it works for me....and like alot of other people...there's alot of work riding on the fact that your servos perform. I will buy more of them.

Also...comes with screws...bushings/insulators. I like the Dubro arms though...they fit good on the servos.
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Old 07-24-2004, 08:57 AM
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Default RE: Hitec HS-645MG

I have 2 645MG on elevator in my 1/4 scale H9 CAP 232 and they work great on 5 cell 1100ma. I find the gears on the 605 stripe pretty easy but great
servos for the price.
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Old 07-24-2004, 09:13 AM
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Default RE: Hitec HS-645MG

The only corless servos offered by Hitec are the 900 series and upper end digitals... All the rest are 3 pole standard analogs, with a few 5-pole servo offerings.
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Old 07-27-2004, 08:25 PM
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Default RE: Hitec HS-645MG

Hi guys, just to deviate a bit , what are your thoughts on the performance of the Hitec 545, five pole servos for use in a 1/4 scale sport plane.
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Old 07-28-2004, 07:16 AM
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Default RE: Hitec HS-645MG

I have had a couple 545's. they are nice and torqy but they are somewhat slow. They center real well. they seem to have a little less tough geartrain as I had to replace some stripped gears. I personally would not use them on 1/4 scale and up. I would want the metal gear or karbonite for the extra vibration protection
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Old 07-28-2004, 07:30 AM
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Default RE: Hitec HS-645MG

I use Hitec HS 645BB MG on pull pull for my rudder on a 120 size CG Sukhoi. Works fine now for 2 yrs with Dubro servo arms. Two HS 77BB for my elevator mounted just below the leading edge of the horiz stab. Two HS 605 BB for the ailerons. All work fine on two 6V 2000 mah NiMh packs parallel with their own swithches and charging jacks. Nope....I don't use a regulator.
Yesterday for the first time my rudder twitched on power up. It must have been due to just taking the packs off charge.....it settled down after a few seconds and didn't do it again.

I have full confidence in Hitec. I also use their flight pack in a Pitts S2C and Futaba Transmitter T6XAs. All work fine together. Hope this helps some.

Cheers.
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Old 07-28-2004, 02:56 PM
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Default RE: Hitec HS-645MG

I have the 545's in a G45 powered MW Extra 300, with one per aileron and split elevator, and two on the rudder. I only do general sport flying with some occassional intermediate aerobatics, so hopefully they will stand up to my type of flying.
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