250cc 7 cylinder



RPM range

Height from prop shaft or diameter on radial

11.8 inches

Length mount to hub

9.25 inches


6400 gram

Prop range 2 blade

32*14 or 33*16 on vintage

32*18 allround

32*19 on warbird

Prop range 3 blade




Vogelsang Aeroscale is the official and trademark protected Moki dealer for the US market and is working closely with the manufacturer in order to protect your best interest as well as to offer you the best service possible based on our many years of Moki experience and service. Moki gas model engines are designed from the ground up as powerplants for model aircraft use and are optimized for this purpose. Engine components are finished using latest CNC technology,guaranteeing a constant quality and tolerance from part to part.The motor has been developed to produce maximum power at relatively low RPM with high torque characteristics. It includes a state-of-the-art computerized electronic ignition system and runs on environmentally friendly unleaded petrol. Silencing is made by a very efficient muffler systems, which not only gives excellent silencing but also that incomparable scale sound. These engines has been developed especially for the giant scale and aerobatic enthusiast. Moki engines undergo many control checks and are extensively field tested before going into final production. From singles, thru flat twins to radials, they offer an engine for practically all large to giant scale aircraft.  The processor controlled electronic ignition with integrated spark advance module assures ease of starting and smooth running throughout the RPM range.

We stock replacement parts and very unique accessories for your Moki engines, can provide advice. Dr. Vogelsang has been flying Moki engines on his warbirds and vintage models for over a decade and has the experience needed in order to assist you. Furthermore he is able to contact the German Moki Headquarters and can resolve any matters should manufacturer input be needed. Being part of the German scene and having been exposed to the rise of 4-stroke radials first hand he uses APS electric pumps on all his four-stroke gas engines. These pumps were designed by Mr. Bernd Albinger in Germany and eliminate the build-in pump. This eliminates fueltransport-related maintenance and eliminates one potential cause for the engine running too lean. You see, we  actually USE these engines, not just sell them. Furthermore Dr. Vogelsang visits Germany to meet with the technical staff at Moki there in order to keep up with the latest innovations and changes at Moki and be educate himself first hand on what new developments are taking place, both when it comes to service, maintenance and new engines in development.

Götz : As all gas engines you need to keep an eye on your cooling. It is not about how much air gets in, it is important that it is forced over the cooling fins and is able to exit through ample ports. Ideal is a ratio of “cowl” intake area to exit of 1:2 or 1:3. I run basically all of my 4-stroke gas engines on our APS fuel pump, which is fully programmable. This ensures that on radial engines we are not dependent on the artificial air impulse driving the Walbro, and on all other engine layouts it eliminates the danger of the impulse line hydro-locking on the oil that wants to exit the crank case housing. As with all 4-strokes you have many possible exhaust layouts to play with. From lightweight to sophisticated, from loud and menacing to quit, from as easy as a simple straight pipe to the most complex setups. I would love to get the chance to discuss the options with you. If your install allows I would always consider an air filter. This is not mainly to keep the dust and grime out of your motor, the true effect is your carb being offered a “steady” environment, your carb running at a leaner needle setting and most of all, keeping the inside of your cowl area and airframe clean from the otherwise expelled pre-mix oil.

We carry many exhaust solutions, many accessories and upgrades and the correct propellers. Furthermore we can offer custom made, absolute museum quality, flying propellers for your top tier projects.

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