Designed by H Sherman Tharpe the Duster was modified from his 1929 Sierra BLW design and claimed to be the first airplane specifically designed as a duster (overlooking the Huff-Daland ag planes).
A single place monoplane, three were built: NR10609, NR10626 and NR10627.
NR10626 was scrapped in 1945 and the others were destroyed in crashes 1937 and 1945.
Engine: 220hp Wright J-5
Wingspan: 42’0″
Length: 30’6″
Useful load: 1225 lb
Hopper capacity: 1000 lb
All Aero 