Strength tests were made using testing apparatus similar to that used by the National Swedish Testing Institute for Agricultural Machinery and the National Institute of Agricultural Engineering, Silsoe, England, to establish whether or not the safety frame is of adequate strength to prevent excessive deformation in the event of an overturning accident. The deflections of this frame during impact and crushing tests were within satisfactory limits. The frame did not unduly affect accessibility, visibility or maintenance, and no change was noticed in the noise level to which the driver was subjected.

Strength tests were made using testing apparatus similar to that used by the National Swedish Testing Institute for Agricultural Machinery and the National Institute of Agricultural Engineering, Silsoe, England, to establish whether or not the frame is of adequate strength to prevent excessive deformation in the event of an overturning accident. The deflections of the frame during impact and crushing tests were within satisfactory limits. The frame did not unduly affect accessibility, visibility or maintenance, and no change in the noise level to which the driver was subjected was noticed when the frame was fitted.

Strength tests were made using testing apparatus similar to that used by the National Swedish Testing Institute for Agricultural Machinery and the National Institute of Agricultural Engineering, Silsoe, England to establish whether or not the safety frame is of adequate strength to prevent excessive deformation in the event of an overturning accident. The deflections of this frame during impact and crushing tests were within satisfactory limits. The frame did not unduly affect accessibility, visibility or maintenance, but noise caused by the vibration of the removable front brace was annoying.

A new concept for aerial application of agricultural pesticide chemicals, seeds, and fertilizers is now nearing the point of practical application. The concept involves utilization of air forced from the trailing edge of the wing of an aircraft to give boundary layer control of air flow effects on the wing and to entrain and transport dry chemical materials through ducts in the wing and discharge them rearward. The new system offers improvements in application of dry materials by permitting higher application rates per acre, and wider, more uniform material distribution. Research leading toward the development of the “distributor wing” has been conducted for the past five years by agricultural engineers at University of California, Davis, in cooperation with Kenneth Razak, formerly Dean, College of Engineering, University of Wichita, Kansas, who has also developed an aircraft to utilize the new wing.