120 MODEL AVIATION
AMA Plans Service Showcase
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Stroker
IN 1985 SEVERAL new four-stroke .40- to .45-size
engines were available. Randy Randolph reasoned that a
purpose-designed RC sport model with a shoulder-wing
placement would be just the thing for builders who wanted
to make use of those power plants.
That year Randy crafted the Stroker, which could be
assembled in a few evenings from sheet and strip balsa stock. It
uses a constant-chord, built-up, 50.5-inch-span wing and features a
fairly long tail-moment arm to allow proper balance with the
slightly heavier four-stroke engines.
This model can also be powered by a glow engine or modified
to accept electric power with the battery placed near the front of the
fuselage to achieve the proper balance point.
Stroker plans, which are set 470, are available through the AMA
Plans Service. MA
08sig4.QXD 6/22/07 12:39 PM Page 120
Edition: Model Aviation - 2007/08
Page Numbers: 120
