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Old 10-24-2018, 06:09 PM
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Hitec D-645MW Servo test

Hitec servo test (1 min 14 sec)


Bottom line, 240 oz in at 8.4V and just a hair under 3 amps
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Last edited by ghoffman; 10-25-2018 at 08:35 AM.
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Old 10-24-2018, 07:05 PM
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Thanks for sharing. I normally would use a 7954 on my warbirds tails but am currently building a Meister Jug and planning on these all around! My only complaint is I have to buy Futaba spline now. Oh well/ fire sale on older Hitec SWB arms!!LOL
I love the soft start and look forward to saving some $ on them for a whole plane.
Jason
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Old 10-24-2018, 08:13 PM
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https://hitecrcd.com/support/upgrade...ies-servo-line
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Old 10-25-2018, 07:24 PM
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While the D625 / D645 servos perform quite well they are not built in an overly heavy duty set of mechanics. Gearing is adequate for moderate applications but I'd never use them in critical control surface applications such as many 3D planes with the wide control surfaces. They are very adequate for warbird use where the surfaces are much smaller and they are a fantastic sport servo. They are great replacements for the older and very popular analog 625 / 645 and the horrible 5625 / 5645 digital servos. The D625 / 645 are great performing servos if one understands their applications and limitations. I have quite a few of them scattered in several different airframes.
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Old 10-25-2018, 08:57 PM
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I'm planning on using it as a DA-120 throttle servo. The precision of it is impressive.
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Old 10-26-2018, 11:01 AM
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Quote:
Originally Posted by Truckracer View Post
While the D625 / D645 servos perform quite well they are not built in an overly heavy duty set of mechanics. Gearing is adequate for moderate applications but I'd never use them in critical control surface applications such as many 3D planes with the wide control surfaces. They are very adequate for warbird use where the surfaces are much smaller and they are a fantastic sport servo. They are great replacements for the older and very popular analog 625 / 645 and the horrible 5625 / 5645 digital servos. The D625 / 645 are great performing servos if one understands their applications and limitations. I have quite a few of them scattered in several different airframes.
Not really made for 3D airplanes and I usually don't suggest it for them either. They are amazing on warbirds, sport airplanes, trainers, surface applications like 1/10 truck or buggy, and are also very popular with robotics crowds.

I personally know of one instance where a warbird pilot upgraded from analog HS-645MG's to the D-645MW on HV and was blown away at how much more precise they made his airplane fly.
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Old 10-26-2018, 11:42 AM
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Definitely a lot of servo for the $$!
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Old 10-27-2018, 01:51 PM
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How is the centering and gear lash on the D645/25????????
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Old 10-27-2018, 03:34 PM
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Quote:
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How is the centering and gear lash on the D645/25????????
Mine are perfect so far
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Old 10-27-2018, 08:55 PM
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How is the centering and gear lash on the D645/25????????
On par with much more expensive servos, at least when new. The ones I have been using for awhile now have remained quite tight.
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Old 10-27-2018, 09:10 PM
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Mine are perfect so far
Me too.
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Old 10-28-2018, 09:26 AM
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Thanks for the comments that's great to hear
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Old 10-28-2018, 11:19 AM
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I'm a sport flyer type that only fly's up to 35cc. I recently upgraded the servos in my Aeroworks YAK to D645's. I swear I can feel the difference in the air!
Pete
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Old 04-11-2021, 08:31 AM
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D 645

Have been using Hitec for years but just bought a new batch of these for my warbird and one totally died during set up running 6.6 life. It would have crashed the plane so now I am rethinking my decision and may pull them all out before the first flight.
I probably should have waited until these had been out a while before buying. Just my 2 cents.....
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Old 04-11-2021, 01:48 PM
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1/4 Scale Cub full of these - great.
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