From the Ground Up:
By Frank Granelli
IT LOOKS DIFFERENT from the .40 cu. in. engine that came with your RTF trainer. There is a “bump” on top, and the glow plug points from the head at an angle. The carburetor appears to be upside down, and the throttle arm is on the wrong side. The sound is also different from your engine; it’s lower in pitch with a “crack” to it. The owner calls it a “four-stroke” and says he wouldn’t fly with anything else.
Despite its different appearance and sound, the model four-stroke engine is identical to…
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