Acme Sierra
The Acme Aircraft Co S-1 Sierra was an experimental aircraft of unusual configuration built in the US in 1948 to investigate the advantages of a pusher propeller configuration.[1][2] Apart from this engine installation, the aircraft was unusual in having an Y-shaped tail incorporating ruddervators on the upper fins. The wing was shoulder-mounted on the fuselage and was unswept.
During the 1960s, the US aerospace manufacturer Northrop used the aircraft as a technology demonstrator for boundary layer control concepts.[2][3]
Specifications (S-1 Sierra)
Data from Flight Magazine[1]
General characteristics
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See also
Aircraft of comparable role, configuration, and era