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Old 05-04-2019, 08:09 PM
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I hammer at 1500 feet
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United States, LA, Shreveport
Joined Apr 2012
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After 2 years of use, and over 150 flights
this includes flying the advanced IMAC sequence 450 times
and it indicates having performed over 3200 snaps
the NXB 8921 servos on my airplanes wings, for ailerons, have developed severe slop, they are mushy, and basically, require replacement.

Anyone have any advice for what I should try next?

I am on the fence on MKS vs Futaba HPS A700
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Old 05-04-2019, 09:57 PM
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3W/ZDZ Flyer
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United States, CA, Apple Valley
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DFA has parts for them.


BV
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Old 05-04-2019, 10:35 PM
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United States, TX, Cypress
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That’s a hard choice, Cam. I love my MKS 380s and they are well proven. The Futaba servos sounds great though.

One big upside of the MKS servos is that the gear sets are very reasonably priced. Also, when you do have to replace gears you can do it without remove the servos from the airframe. There are 4 bolts that come out from the top that allow access to the gears.

I’d also consider the Promodeller DS630BLHV. 630oz/in. I haven’t tried them but I’ve read many great reviews of the Promodeller servos.
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Old 05-05-2019, 07:16 AM
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I hammer at 1500 feet
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United States, LA, Shreveport
Joined Apr 2012
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Do you believe I can send the servos to them and they can repair?
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Old 05-05-2019, 07:38 AM
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SILVER FOX
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.
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Old 05-05-2019, 08:57 AM
Bill Vargas is offline
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3W/ZDZ Flyer
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United States, CA, Apple Valley
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Cam, parts are also available from RCDepot Japan and Mooney over there would be the POC.


Taken from an earlier post in this thread,,,


>>> Does anyone have an update on JR Servo availability?
Many of the RC online stores that used to carry them don't carry them anymore, and I just checked the JRamericas website, and it doesn't seem like you can get the NXB8921+ as of now.<<<




I've had good success dealing with Mooney at RC Depot during those Dark JR times for my needs. They appear to be still available at RC Depot Japan and contact Mooney at [email protected] for more info. Shipping is a good 10 days from there to stateside.


https://translate.google.com/transla...m/&prev=search




BV
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Old 06-07-2019, 11:53 PM
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Let me preface this with ProModeler is my company and the servos are my design. The point? I have a dog in the hunt. So feel free to use a grain of salt if your BS meter goes off, and call me out on anything I write, which you feel is unfair or untrue. Anyway, here goes.

I've spent a fair bit recently buying top servos from competing companies. Why? I just want to see what they're up to! With respect to MKS, I found the HBL599 and HBL380 seem to be the same servo mechanically other than the output shaft. The latter is 8mm vs. the standardized 6mm 25T spline we and Futaba use. I'll focus on the HBL599 in the comparison photos but bear in mind everything other than cosmetics holds pretty much the same with respect to the MKS HBL380.

Finally, expect MKS apologists to go on the attack - but - my advice is let your eyes inform you. Simply put, you don't need to be an engineer to understand the differences between a servo designed to meet MIL-STDS versus one meant for hobbyists.

Got a question regarding other brands? Start a thread regarding how a SAVOX 2290SG compares to to ours, or a Futaba 172SV and I'll be happy to show you how they stack up. Finally, it's true we're an itty-bitty FL-based company busy hogging solid billets of 6061-T6 into servo cases, so going up against the oriental behemoths may be a mismatch, but we say . . . bring it on!
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Old 06-08-2019, 09:08 AM
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Interesting.
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Old 06-08-2019, 05:32 PM
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TEAM EXTREME FLIGHT
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Largo, Florida
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I've switched my entire fleet over to ProModelers. These servos are built so beautifully build and perform so well there is no going back.
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Old 06-17-2019, 12:37 PM
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No Balsa Withstands my Wrath
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United States, SC, Fort Mill
Joined Jan 2009
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I just finished my build of a 75" 3dhs edge and used the ds305clhv servos. Only have 6 flights on them but so far very impressed. I have a few other planes around this size with mks and hitec servos and for the torque and speed of these they are very current thrifty. Running a 1000mah 2 cell i can get4-5 flights per charge and only around 3 flights for the mks.
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