Smith Miniplane

The Smith DSA-1 Miniplane ("Darn Small Aeroplane",Montgomery 1992, p.12 "Darned Small Airplane",Davisson 1970 or "Damn Small Airplane""Canadian Fly-in") is a single-seat, single-engine sport aircraft designed in the United States in the 1950s and marketed for home building.Taylor 1989, p.826

Design The Miniplane is a conventional single-bay biplane with staggered wings of unequal span braced with N-struts and wires.Markowski 1980, p.351 The Miniplane design has fixed undercarriage with a steerable tailwheel and although designed with an open cockpit, many have been fitted with canopies. The fuselage and the tail fin are of a conventional truss design constructed of welded steel tube and covered in fabric,Plane & Pilot 1978, p.153 and the wing spars and ribs are made from spruce and also fabric-covered. A variant has been built with an all-metal wing construction.

Engines used by builders are generally the 65-hp (48-kW) Continental A65, 85-hp (63-kW) Continental C85 or the Lycoming O-235 of 100 hp to 125 hp (75 kW to 93 kW).

Development Designer Frank Smith died of a heart attack shortly after completing the prototype. His wife, Dorothy, and son, Donald continued to market the plans into the 1970s and Donald worked on a two-seat version, the Miniplane +1.

In the late 1990s Sky Classic Aircraft of Des Moines, Iowa was developing an improved version of the Miniplane designated as the Smith Sport Miniplane. This model featured more cockpit room for larger pilots, a new airfoil and re-drawn plans to aid construction.Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 358. BAI Communications, 15 July 1998.

In 2010, Sky Classic Aircraft of Des Moines, Iowa marketed plans for another updated version of the Miniplane, the Miniplane 2000."WE Love Biplanes" The Miniplane 2000 incorporates several modifications to the original design, including a slightly longer and wider fuselage to accommodate larger pilots,Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 125. Flying Pages Europe SARL, 2015. adding bracing struts to reinforce the horizontal stabilizer, and changing the airfoil sectionthe original design had a NACA 4412 profile (Taylor 1977, p.561); the revised design uses NASA 23013 ("WE Love Biplanes") and angles of incidence of the wings.Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 118. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X

Operational history In August 1959, Tom Messick flew a Miniplane on a 4,200-mile (6,700-km) round trip to attend the EAA Fly-in at Rockford, Illinois and was awarded a trophy for flying the longest distance to the event.

The prototype DSA-1 is preserved at the EAA AirVenture Museum. Originally lent to the museum by Dorothy and Donald Smith in 1973, Donald donated the aircraft in 1988 in memory of his mother.

Variants DSA-1 Miniplane original single-seat version by Frank Smith Miniplane +1 two-seat version by Donald Smith Miniplane 2000 updated version by Sky Classic Aircraft Sport Miniplane updated version from the late 1990s by Sky Classic Aircraft, with more cockpit room for larger pilots, a new airfoil and re-drawn plans.

Specifications (DSA-1 prototype)

Smith Miniplane

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