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Metric units templates. Use for aircraft produced outside the US and UK (click here for imperial versions for use with US and UK aircraft) See the main WikiProject aircraft page for other usage guidelines.
2.3 Fixed wing, sailplane. 2.4 Rotary wing. ... Imperial units templates. Use for US and UK aircraft ... Height: ft in: m Wing area: ft² ...
True wind (V T) is the same everywhere in the diagram, whereas boat velocity (V B) and apparent wind (V A) vary with point of sail. Forces on sails result from movement of air that interacts with sails and gives them motive power for sailing craft, including sailing ships , sailboats , windsurfers , ice boats , and sail-powered land vehicles .
A version with an 18-metre span, with the option of smaller wing tips to fly as a Standard Class glider, was launched in 2004 and designated Discus-2c. [1] When fitted with a small sustaining engine (turbo) it is designated Discus-2cT. [2]
The Discus was the first production sailplane to have a distinctive swept-back leading edge. This is now common in contemporary sailplanes. Studies had long shown that the ideal wing for minimizing induced drag should be an elliptic planform. To keep production costs down, a triple-trapezoidal approximation of this shape was adopted for the Discus.
The SGS 2-33, indicating Schweizer Glider, Sailplane, 2 Seats, Model 33, was designed by Ernest Schweizer. The aircraft was a derivative of the 2-22, which in turn was based on the SGU 1-7 single place glider of 1937. The 2-33 retained the 2-22 and 1-7's metal wing, single spar and single strut arrangement. [1] [2] [5]
It is a Standard Class glider with a 15-metre span, and laminar-flow airfoil section designed by Professor Franz Wortmann. The all-moving tailplane, a feature of many designs of that period due to its theoretically higher efficiency, caused less than desirable high-speed stability characteristics, and so modifications were made to the early design.
Schweizer Aircraft started construction of the 1-35 prototype in late 1972 and it first flew in April 1973. The company carried out side-by-side comparisons with fiberglass sailplanes as part of 50 hours of flight evaluations before making the decision to proceed with manufacturing the design on 10 May 1973.