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The Best Micro Servo For 1S LiPo Setup

What’s Up With DLG Servos?

DLGs are great sailplanes.

So is the radio equipment that sits inside the plane and provides a control for the pilot.

But there is another thing about the RC gear for DLGs – It might be quite expensive.

Especially the servos which are designed to fit into a tiny interior while being precise and lighweight.

But what are the best servos for DLG currently available on the market?

For full-size F3K models KST X08 is the rule of thumb.

But are there any alernatives?

What about choises for 1-meter F3K-Mini models?

Let’s find out together…

Looking for a reliable sub-$40 micro servo for a DLG

As mentioned above. a number one choice for 1.5-meter F3K gliders are KST X08 as well as MKS DS65K / DS75K servos which price tag starts from around $40 and $60 respectively.

Well, this price can be considered for competition planes, when you need that reliability and precision to equip a pricey model.

But what if you are looking for a weekend flyer?

Do you really need to through that much money into the servos?

Or if you are flying a 1-meter DLG where the price of the servos mentioned above may exceed the value of the entire model?

There are some great alternatives on the market, but usually, you have to crawl RC Groups threads to find out what will fit your plane and Rx battery setup.

That’s why in this article, I’ve decided to put all these together, doing the dirty work for you.

Micro Servo 1S LiPo Test

For your convenience, we’ve put together some comparison tests to help you find the best micro servo for your needs.

To make it informative, all the tests below will be done with the same equipment:

  • FrSky X-Lite Pro Transmitter
  • FrSky G-RX8 Receiver
  • 1S 600mAh NanoTech LiPo Rx Battery

As a lot of DLG pilots go with the 1S LiPo setup for their planes and have questions if a particular servo will work on 3.7v.

While servo manufacturers often don’t specify if the servo is working on a single LiPo cell.

“Testing Station” X-Lite Pro, G-RX8, 1S 600mAh LiPo

In addition, you’ll find the total height of the servo measured with a control arm installed, as sometimes this data is missing on the product descriptions.

For example, the total servo height is critical when chosing equipment for a glider like Hawk or IAGO.

So let’s check some data.


TLDR: Quick Links To Test Results


Dymond D47

Centering: 5/5
Speed: 4/5
Weight: 5g
Thickness: 8mm
Total height w/ a control armd:
 23mm
Average Price: $22
Detailed Dymond D47 data

Dymond D47 total height with the control arm

D47 is probably the only servo out there that is widely used with both 1- and 1.5-meter (for tail controls) DLGs and has brilliant reviews all over the place.

We decided to start with it to set up the baseline of the great in all senses DLG servo.

It has a lot of substitutes which may be named as follows:

  • Dymond D47
  • Ripmax SD100
  • Robbe FS31 Pico
  • Modell-Expert X-31
  • Exact 4.7
  • Topmodel 1118
  • X-Micro
  • Midget 4.7

Pilots like it’s precision, durability, and relatively low price point considering its readability, so a lot of 1-meter models use a set of four D47 servos to control all the surfaces.

For the full-size F3K models these servos are often used to control tail surfaces.

They have a low height with the control arm installed which makes it a great addition to the Elf and Hawk DLGs as they fit in the fuse with ease.

These servos have a great centering and work smooth powered with a 1S LiPo bat.

KST X08 V5.0

Centering: 5
Speed: 4
Weight: 8g
Thickness: 8mm
Total height w/ a control arm: 27
Average Price: $45
Detailed KST X08 V5.0 data

Considering that we need some base line standarts, KST X08 should exist in this test as well.

It works in wide voltage range, so seems to be slightly slow on 1S LiPo, however it centers presicely no matter what.

Thanks to it’s performance on single cell LiPo this one is usually used for the full-size (1.5-meter wingspan) DLG models actuating all 4 control surfases.

Great choice if you are up to paying the price as it totally worth every penny.

A video of it’s performance is coming soon.

Hitec HS-40

Centering: 5/5
Speed: 5/5
Weight: 4.8g
Thickness: 8.6mm
Total height w/ a control arm: 24mm
Average Price: $12
Detailed Hitec HS-40 data

Hitec HS-40 total height with the control arm

HS-40 is another small analog servo which has similar specs to the previously mentioned D47.

The exterior is a little different, but the overall height with the control arm is only 1mm bigger than for D47.

I stumbled upon Hitec HS-40 while assembling VM’s Elf.

D47 are the recommended ones for this model, but they were out of stock in my local shops and I needed a substitute.

Hitec ended up to be a great replacement and fit under a tiny Elf’s nose with ease.

In addition, it centers great and is a fraction faster on 1S LiPo than D47.

Check the video below.

Turnigy TGY D56MG

Centering: 5/5
Speed: 3/5
Weight: 5.6g
Thickness: 8.2mm
Total height w/ a control arm: 29mm
Average Price: $6
Detailed Turnigy TGY D56MG data

Turnigy TGY D56MG total height with the control arm

Turnigy TGY D56MG is a great little digital servo with great centering and semi-metal gear.

It’s a little taller than the other 2 above and that’s why it may not fit the fuse of 1-meter DLG models.

However, some people managed to use them with the partially removed outer case on the 1-meter models as well.

I.e. you can take off the bottom part and shrink wrap the servo before installing it.

They seem to be slightly slow on 1S LiPo as it’s a standard voltage version but still makes the job done.

See the video below for reference.

Emax ES9051

Centering: 5
Speed: 5
Weight: 4.1g
Thickness: 8mm
Total height w/ a control arm: 28mm
Average Price: $5
Detailed Emax ES9051 data

Emax ES 9051 ended up being a great tiny servo, which is a little too tall for some 1-meter DLGs but still can be a great “driver”.

It has a plastic gear, same as HS-40 and D47 while being well cheaper.

The speed on a lingle LiPo cell is exelent, so as the centering.

It could even fit in the nose of the Hawk or IAGO 1-meters, however, only w/o the lower part of the plastic housing.

The video of this servo performance is comming soon.

Upcoming Tests

Below there is a list of other servos which seem to work great on DLG models but we haven’t run any tests with them.

If you have some suggestions on other servos to include into this comparison, feel free to leave them comments below.

So, stay tuned and follow us on Instagram and Facebook to get the updates on the new tests.

JX DHV56MG

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 5.6g
Thickness: 8.2mm
Total height w/ a control arm: TBA
Average Price: $10
Detailed JX DHV56MG data

This servo looks pretty much the same as Turnigy TGY D56MG above, but to make the test compelling, we’ll test it separately.

Turnigy MX-95E

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 4.1g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $5
Detailed Turnigy MX-95E data

This servo looks pretty much the same as Emax ES9051 above, but to make the test compelling, we’ll test it separately.

Hitec HS-45HB

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 8g
Thickness: 9.8mm
Total height w/ a control arm: TBA
Average Price: $10
Detailed Hitec HS-45HB data

Turnigy TGY D56LV

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 8.2g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $8
Detailed Turnigy TGY D56LV data

JX D56MG

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 8.2g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $9
Detailed JX D56MG data

Blue Bird BMS 101AMG

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 4.5g
Thickness: 7.6mm
Total height w/ a control arm: TBA
Average Price: $17
Detailed Blue Bird BMS 101AMG data

Blue Bird BMS 101DMG

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 4.5g
Thickness: 7.6mm
Total height w/ a control arm: TBA
Average Price: $19
Detailed Blue Bird BMS 101DMG data

Blue Bird BMS 101HV

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 4.5g
Thickness: 7.6mm
Total height w/ a control arm: TBA
Average Price: $19
Detailed Blue Bird BMS 101HV data

Blue Bird BMS A10 (S/V/H)

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 7.4g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $19
Detailed Blue Bird BMS A10 data

JX PDI-HV0903MG

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 9.4g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $13
Detailed JX PDI-HV0903MG data

GDW DS1906-B

Centering: Upcoming Test
Speed: Upcoming Test
Weight: 8.3g
Thickness: 8mm
Total height w/ a control arm: TBA
Average Price: $28
Detailed GDW DS1906-B data