MLD-28 gasoline engine - RC Groups
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Jun 17, 2008, 11:34 PM
Steven Chao's Avatar

MLD-28 gasoline engine

Hi Guys,

I am starting this thread so that it will be easier to find and track. We are introducing a new 28cc engine with very good numbers. So far this 28cc engine is performing very well in every aspect. We'll be releasing this later this week. You can probably poke around at RC Groups for product annoucement soon.

Basic Information
28cc displacement
2.8 horsepower
Engine + Carburetor: 30 oz or 1.90 pounds
Engine + Side Muffler: 33 oz or 2.05 pounds
Gross Weight: 37 oz or 2.30 pounds (includes electronic ignition with auto advance)
Engine is made in China, but fully serviced in USA. It is MLD-28. Here are some numbers after 30min of running;

Wood Prop with side muffler
16 x 6* 9,000 RPM
16 x 8 8,600 RPM
17 x 7 8,100 RPM
17 x 8 7,900 RPM
18 x 8 7,000 RPM
APC Prop with side muffler
15 x 8 9,500 RPM
15 x 10 9,050 RPM
16 x 8 8,800 RPM
17 x 6 8,800 RPM
17 x 8 8,100 RPM
18 x 8 7,800 RPM

Here are a couple pics, let me know what kind of info you guys need. will be up soon for some basic information early next week. Cermark will have a very limited number of these engines available.

Steven Chao,
Last edited by Steven Chao; Jun 17, 2008 at 11:46 PM.
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Jun 18, 2008, 12:36 AM
The reviewer
XJet's Avatar
Hi Steven,

Any idea of price?

If they're priced right I might include one in my upcoming review (over at of cheap gas engines coming out of China.
Jun 18, 2008, 08:55 PM
Steven Chao's Avatar

Additional background on MLD-28 / MLD28

The MLD-28 (MLD28) is a gas engine designed to rival that of OS FX160 (160FX) and FS200 (FS-200U), but at with a street price, $299.99.

Conceptual requirements behind MLD-28 (I believe we reached most if not all);
(1) Improve fuel cost
(2) Easier cleanup
(3) Push 3D performance envelope
(4) Increase power to weight ratio
(5) Turn lager diameter prop
(6) Maintain vibration expectations
(7) User/start friendly
(8) Retain high RPM capability
(9) Price friendly

The airplanes that MLD-28 was designed around;
Aeroworks 80" Profile Extra
Aeroworks 72" Yak54 QB
CA Models (Aeroworks) Genesis
Cermark / Topgun Spitfire
Cermark Scale Series 70" - Edge 540
Cermark Scale Series 70" - Extra 260
Cermark Scale Series 70" - Yak 54
DPM Extra 330L
DPM (Dave Patrick Models) Piper PA-18 Super Cub
DPM Piper PA-18 Clipped Wing Super Cub
Extreme Flight, 74" Yak-54 1.60
Hangar9 1/4 Scale J-3 Cub ARF
Hangar9 P-51D Mustang 150
Hangar9 P-47D Thunderbolt 150
Pacific Aeromodel Clipped Wing MonoCoupe
Pacific Aeromodel Gee Bee Y 84"
QQ 73 in. YAK-54

Steven Chao,
Last edited by Steven Chao; Jun 18, 2008 at 10:25 PM.
Jun 27, 2008, 11:28 AM
Steven Chao's Avatar is now up.

For sales or additional information, please contact your favorite hobby store or local distibutor;
Canada: Cermark (562) 906-0808
England: CML +44 (0)1527 575349
USA: Cermark (562) 906-0808 or (800) 704-6229

MLD-28S or MLD28S or MLD28 comes as side mount muffler version. It is now available. The "R" or MLD-28R or MLD28R will be available in July. The R version is the rear muffler mount version.

Additional information:
MLD-28S is not a SPE-28. In fact there is no SPE-28. As of today;
MLD => MLD-28S
SPE => SPE-26, SPE-43 and SPE-40 has been discontinued, but still serviced as of May 2008. SPE-43 is the official replacement (parts are not fully interchangeable) for SPE-40.

Steven Chao,
Jul 12, 2008, 02:21 AM
Steven Chao's Avatar
Here is video that we put together with Cermark's new Scale Series 70 EDGE 540 with a new MLD-28S engine. The video is a composition of the 1st 3 flight of the airplane with a brand new (not broken-in) MLD28 or 28cc gasoline engine.

Here is the link:
SS70 Edge 540 + MLD-28S (breaking in) (3 min 28 sec)

Steven Chao,

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