Sasin Spraymaster
The Sasin SA-29 Spraymaster was an agricultural aircraft designed and manufactured in Australia in the 1960s by Sasin Aircraft Service of Goulburn, New South Wales in conjunction with Aerostructures at Sydney's Bankstown Airport. Design and development By the 1960s the converted World War II-vintage types that comprised a large part of the Australian agricultural aircraft fleet were in need of replacement. Sasin Aircraft Service of Goulburn, an operator of a de Havilland Tiger Moth modified for use as an agricultural aircraft, decided to convert de Havilland Canada DHC-1 Chipmunks for agricultural use and contracted Aerostructures at Bankstown to perform the necessary modifications. The starting point was a Mk. 10 or Mk. 21 version of the Chipmunk. The modifications included a redesigned fuselage to accommodate a 50 Imperial gallon (227 L) hopper located where the front seat was found in the original aircraft, and a completely new cockpit in the location of the original rear seat. An air-driven spray pump was mounted under the forward fuselage. The pilot sat 11 inches (28 cm) higher than in the original aircraft. A turnover truss and a new energy-absorbing seat were provided to protect the pilot from injury in a crash; and cable cutters