Scheldemeeuw (oz5199)

About this Plan

Scheldemeeuw (Sheldt Gull). Scale Co2 powered model of the 1930s Dutch single-seat biplane pusher flying boat.

Quote: "A seldom seen pusher-flying boat design for use with CO2 power. Sheldt Gull, by John R Walker.

The Scheldemeeuw (Scheldt Gull) was a light single place pusher flying boat, built by Koninklijke Maatschappij of Vlissengen in the Netherlands. The plane had a single-step flat-sided hull and was constructed of spruce and plywood. The hull was plywood covered.

Built in the mid-1930's (an all metal version of the Gull was constructed but WWII caused the developmental program to come to a halt) the Gull had a span of 22 feet (6.7 m), a length of 17.3 feet (5.3 m) and a height of 8.16 feet (2.3 m). Maximum speed was 78 mph (125 kmh) and a cruising speed of 65 mph (105 kmh). Range was 1900 miles (300 km). A 40 hp Parga two cylinder opposed aircooled engine supplied the power.

No three-views could be found. Our model was developed from photographs and infor-mation supplied in Jane's All The World's Aircraft 1939.

Since the original Gull had a twin cylinder opposed aircooled engine, the Brown COs Twin seemed to be an ideal selection for our model. We were quite pleased with the flight characteristics. Only three test flights were necessary to trim out our model. The model flew at a slow, steady speed and climbed until the CO2 charge started to run out. The dry, hot weather precluded ROW flight testing.

Construction. The model is not difficult to build. It must, however, be built light. Use care in selecting the balsa. Use the lightest wood you can find. If 1/20 in sheet is not available, sand 1/16 sheet to that thickness. We made ours by placing 1/16 sheet between two lengths of .040 music wire that we had 'hot Stuffed' to a smooth, flat board. We sanded until our sanding block contacted the wires.

Additional weight can be removed by cut-ting lightening holes in the ribs and formers.

The first step is to construct the fuselage. Cut out all formers, the backbone and keel... "

Update 27/05/2016: article pages, text & pics added, thanks to RFJ.

Supplementary file notes

Article.

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