| Stinson Junior | |
|---|---|
 | |
| Stinson SM-2 Junior of 1928 at the Sun N'Fun show, Lakeland, Florida in April 2007 | |
| Role | three/four-seat private civil aircraft |
| National origin | United States |
| Manufacturer | Stinson Aircraft Company |
| First flight | 1928 |
| Number built | 321 |
| Developed from | Stinson Detroiter |
The Stinson Junior was a high-winged American monoplane of the late 1920s, built for private owners, and was one of the first such designs to feature a fully enclosed cabin.
Stinson Aircraft had introduced their large high-winged six-seat SM-1 Detroiter in 1927. [1] The SM-1 was sold successfully to airlines and other commercial operators, but it was too large to appeal to private owners.
Stinson therefore redesigned the aircraft with shorter span wings, shorter fuselage and a choice of less powerful engines as the SM-2 Junior. The aircraft was a strut-braced high-wing monoplane with a sturdy outrigger undercarriage which was braced against the wing support struts and the initial 110 h.p. Warner Scarab engine was normally left uncowled. The first SM-2 flew in mid-1928 and deliveries commenced that year. Later versions of the SM-2 had higher-powered engines of between 165 h.p. and 225 h.p. [2]
The design was further developed to produce the more powerful and heavier SM-7 and SM-8 models which were full four-seaters and these were also used by commercial firms. The Junior R of 1932 had a deeper fuselage and a low-set stub wing to mount the undercarriage and wing struts.
The various Stinson Junior models were in production between 1928 and 1933, being bought by both wealthy private flyers and commercial enterprises. A total of 321 Juniors were built, of which 27 survived in 2001 and several of these were airworthy in private hands. [3] In 1977, the Experimental Aircraft Association painted an SM-8A "Spirit of EAA", and flew a cross-country tour as the support plane with a "spirit of St. Louis" replica as part of the 50th anniversary of Lindbergh's Trans-Atlantic crossing. [4]
(per Simpson, 2001, pp. 523–524)
Data from <Green, 1965, p. 298>
General characteristics
Performance
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