The 1928 Simmons SP-1 Sport Monoplane built by Herbert H Simmons was registered N7477 c/n 61. A two-place, open cockpit monoplane, the registration was cancelled on 22 July 1930.
Engine: Super LeRhône static
Wingspan: 36’6″
Length: 21’9″
Seats: 2
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All Aero 