Abstract
Some torque measurements were taken on a Rotary cultivator with L-shaped blades. The results of tests show as follows.
1) The torque (at the drive shaft) was approximately linear with the forward speed, and with the number of blades.
2) Torque increased with the rotational speed of the blades despite of the decrease in the pitch of cut.
3) It is generally desirable to operate this machine at the peripheral speed of the blade below 6m/s (200rpm) in view of power consumption.
4) We must decide the forward speed and the rotaional speed of the blades with regard to the purpose of its use.
