Diamond Demon (oz4353)

About this Plan

Diamond Demon. Free flight model for .020 power.

Printed as the Old Timer of the Month, in Model Builder magazine issue 06-75. This is a 71% scaled-down version of (according to the attached scanned MB text) the Ray Heit original 49 inch span 1939 Diamond Demon (oz8646).

Quote: "Old Timer Model of the Month. 020 Diamond Demon. Designed by Ray Heit. Replica by 'Doc' O'Meara. Drawn by Phil Bernhardt. Text by Bill Northrop.

The June 1939 issue of MAN had a full ad from Ray Ridge Model Airplane and Supply Co, Brooklyn NY (later to become Art Hasselbach's Consolidated Model Engineering) which announced the 49 inch span 'Diamond Demon.' It had flown in its first contest on March 19, 1939 and set an NAA record, including an OOS flight of 8 minutes 12 seconds. The engine was an Ohlsson 23.

Designed by Ray Heit, who also created the Bay Ridge Mike and Thermal Magnet (oz4965), the little ship's fuselage was a 'crutch' type, with a triangular cross section above and belov,. the crutch, thus giving it the diamond shape.

The .020 Replica of the Diamond Demon, in the photos, was built by 'Doc' O'Meara, of Monterey, California, by making a 71% reduction of the kit plans. He flies it power left, glide right, utilizing a hinged drag tab on the right wing to induce the turn - without it the model glides straight."

Direct submission to Outerzone.

Update 29/05/2013: PhilO kindly mailed in to point out that both AMA and SAM list Jerry Stoloff as the designer of the Diamond Demon. Maybe Ray Heit designed this version for the Bay Ridge Models kit. Not sure.

Supplementary file notes

Planfile includes article.

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