Abzug S-4 (Shrimpo S-4) - Free flight gas model, for Elf .09 engine.
Originally published in MAN, January 1939. This is a later reprint from MAN, October 1979.
Quote: "How to build a three-foot gas model. Here is a beautiful flier that is simple to build and easy to transport... In glancing over the design of the S-4, one thing should be almost instantly apparent. Here is a gas model that is almost as simple as it could be. The elimination of unnecessary construction was kept foremost in mind while the designing was in progress. The result is a model that will fly out of your workshop in about twenty hours to begin a long career of thrilling flights. The S-4 usually outclimbs every large gas job on the field with ease; but like most of the other small gas buggies with which we are familiar, its soaring possibilities are rather limited. However, this last disturbing fact is so far outweighed by the previously stated advantages of these midgets that we are sure that as soon as the movement to put them in a separate, class by themselves at contests becomes widespread, the eight to ten foot "barn doors" will be definitely on the way out."
Abzug S-4, MAN, October 1979.
Direct submission to Outerzone.
Article pages, thanks to RFJ.
Copy of original article pages from 1939, also includes drawings as first printed.
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