Following the experience of developing the J/1B Aiglet agricultural aircraft, and at the request of the Crop Culture company on the Isle
of Wight, Auster developed a more powerful successor the J/1U Workmaster.
Using the basic Autocrat fuselage, it was strengthened and had dorsal fin fillets added, low-pressure tyres and a 180 hp (134 kW) Lycoming O-360-A engine.

Of traditional high-wing layout, it carries 90 gallons of spray fluid in a tank beside the pilot, an extra seat being provided for a passenger.
The Lycoming engine driving a McCauley v.p.
propeller giving it ample power;  with slotted ailerons, balanced tail controls and oversize tyres providing good handling during operations in restricted spaces and rough surfaces.

The aircraft were fitted with Micronair rotary atomizers for crop spraying and a 100-imperial-gallon (455-litre) chemical tank in the fuselage, with an emergency dump valve allowing the tank to be emptied in 5 seconds.
The Workmasters were mainly operated in West Africa, three returned to the UK later and are currently (2018) on the U.K. civil aircraft register.
Following the experience of developing the J/1B Aiglet agricultural aircraft, and at the request of the Crop Culture company on the Isle
of Wight, Auster developed a more powerful successor the J/1U Workmaster. Using the basic Autocrat fuselage, it was strengthened and had dorsal fin fillets added, low-pressure tyres and a 180 hp (134 kW) Lycoming O-360-A engine.
Of traditional high-wing layout, it carries 90 gallons of spray fluid in a tank beside the pilot, an extra seat being provided for a passenger. The Lycoming engine driving a McCauley v.p. propeller giving it ample power;  with slotted ailerons, balanced tail controls and oversize tyres providing good handling during operations in restricted spaces and rough surfaces.
The aircraft were fitted with Micronair rotary atomizers for crop spraying and a 100-imperial-gallon (455-litre) chemical tank in the fuselage, with an emergency dump valve allowing the tank to be emptied in 5 seconds. The Workmasters were mainly operated in West Africa, three returned to the UK later and are currently (2018) on the U.K. civil aircraft register.
Auster J family