Schmutzhart SCH-1
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The Schmutzhart SCH-1 is an American high-wing, single-seat, T-tailed
glider Glider may refer to: Aircraft and transport Aircraft * Glider (aircraft), heavier-than-air aircraft primarily intended for unpowered flight ** Glider (sailplane), a rigid-winged glider aircraft with an undercarriage, used in the sport of glidin ...
that was designed and built by Berthold Schmutzhart.Said, Bob: ''1983 Sailplane Directory,
Soaring Magazine ''SOARING'' is a magazine published monthly as a membership benefit of the Soaring Society of America. It was first published in 1937. The headquarters is in Hobbs, New Mexico. The magazine's article topics include safety issues and accounts of ind ...
'', page 61, Soaring Society of America November 1983. USPS 499-920


Design and development

Schmutzhart had already built one glider when he lived in his native Austria. When he moved to the United States in 1958 he decided to design and build a new glider, but was constrained by the dimensions of his small Washington, DC townhouse. As a result, he built a small aircraft that still achieved good performance for its size. The SCH-1 has a wingspan and employs a Nickel 17%
airfoil An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. ...
, with flaps for glidepath control. The flaps can be set to 0, +4, +45 and +70 °. The basic structure of the SCH-1 is aluminium with some fiberglass fairings. The leading edge
wing rib In an aircraft, ribs are forming elements of the structure of a wing, especially in traditional construction. By analogy with the anatomical definition of "rib", the ribs attach to the main spar, and by being repeated at frequent intervals, form ...
s are made from dense Styrofoam cut with a bandsaw, with the ribs aft of the spar fabricated from cold-formed sheet aluminum. The fuselage was constructed by bending the outside skin onto a jig and then riveting the bulkheads and stringers to the skin from the inside. The wings were built in a similar manner in a jig that held the wing skins, with the ribs then fitted to the skins. Schmutzhart says that the wing skins were formed by being "pressed between the floor, a long board, two lawyers, one architect, a federal bureaucrat and a White House aid". The wing spar is a 6061-T6 aluminum milled I-beam, with the outer spar sections built up from bent flat aluminum stock. The aircraft was originally fitted with an all-flying tail, but this was later modified to a conventional tailplane and elevator. The aircraft is registered with the Federal Aviation Administration in the '' Experimental - Amateur-Built'' category. Only one SCH-1 was built.


Operational history

In June 2011 the SCH-1 was still registered to Schmutzhart, some 34 years after its completion.


Specifications (SCH-1)


See also


References

{{reflist 1970s United States sailplanes Homebuilt aircraft Aircraft first flown in 1977