I don't know if anyone actually tried this but Thomas Sopwith (of Camel fame) named his first (the first) amphibious aeroplane, the Sopwith Batboat.
While searching the 'net for info about seagulls for the Herring Sea Gull project, way down deep into Google this fascinating little invention begged to have a cardmodel made of it. During World War II the Marshfield (Coos Bay) plant manufactured marine plywood for PT boats and interior plywood, panels, doors, and bulkheads for the construction of hundreds of Liberty Ships made by the US Maritime Commission. The properties of wings and propellers are strongly influenced by the shape of the airfoil sections selected by the designer.
Clark-Y is the name of a particular airfoil profile, widely used in general purpose aircraft designs, and much studied in aerodynamics over the years.
The Clark YH airfoil was the same but with a reflexed (turned up) trailing edge producing a more positive pitching moment for improved longitudinal stability.
The Clark Y has found tremendous favor for model aircraft, thanks to the flight performance that the section offers at medium Reynolds number airflows. The benign stalling characteristics of the airfoil are another aid, as this allows an inexperienced radio-control model hobbyist a better possibility of recovering from a stall in flight, to the benefit of the model. The Sea Gull Flying Boat comes in two sizes (largest is about 10" long) with great instructions.


Nothing to do with a sea gull pretty much but lots to do about flying in ground effect-a concept evidently little understood back in 1933. You could extend the outer sponsons into a lovely 30s style wing planform but how would you power it? The plant made aircraft plywood and cut and shipped special birch veneer to Britain for use in construction of the famed De Havilland Mosquito Bomber. For many applications the Clark Y has been adequate; it gives reasonable overall performance in respect of its lift-to-drag ratio, and has gentle and relatively benign stall characteristics. Application on model aircraft is very wide, ranging from free-flight gliders through to multi-engined radio control scale models. The depth of the section lends itself to easier wing repair, as the modeller will often then have better access to balsa structural elements.
Other flying boat models: Hansa-Brandenburg, Sikorsky S-38, Sopwith Tabloid, Piper Cub, DeHavilland Beaver, Grumman Goose, Grumman Duck, Kingfisher, and many OTHERS ! Do it yourself furniture projects made with PureBond from Columbia woods Products America’s most popular hardwood plywood panels. With regard to the Seagull and the idea of high-speed "flying-boats" being propelled by water propellors, I refer you to the author Rudyard Kipling's story "With the Night-Mail" an early science-fiction story (Steam-punk enthusiasts take note) about a regular airship flight across the North Atlantic.


But the flat lower surface is sub-optimal from an aerodynamic perspective, and it is rarely used in new designs. The Clark Y is appealing thanks to its high camber, which produces a very good lift-to-drag ratio on comparatively lightweight balsa models, and for its near-horizontal lower surface, which aids in the accurate construction of wings on plans mounted on a flat construction board.
The airfoil has a thickness of 11.7 percent and is flat on the lower surface from 30 percent of chord back.
PlyDesign lxxiii Distinctive DIY Projects in Plywood and other canvas goods Phillip Schmidt on. The flat bottom simplifies angle measurements on propellers, and makes for easy construction of wings on a flat surface. Get word about plywood for your plate betterment projects from DIY Amy designs a set of outside stools made.




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