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Offset single wing spray rig
"I wanted to eliminate guesswork when spraying crops," says Australian farmer Trevor Day who built an "offset" spray rig with a single 50-ft. wing off to one side of the tractor.
The offset design lets Day apply chemicals with 100% accuracy by following a mark made by a single tine at the end of the boom. Because there's only a single wing off to the one side, he can simply follow the mark with his tractor tire. No need to strain to line up the end of a lengthy boom with a previous sprayer pass.
The three-section spray boom is anchored to the spray trailer behind the tractor by two steel cables that run from the front of the trailer to positions out toward the end of the boom. The boom rides easily over rough ground on two large wheels.
Day's marker is unique in that when traveling forward it digs out a clearly visible furrow that's easy for the tractor operator to follow. On tight turns, when the end of the boom backs up, the tine automatically pulls out of the ground and rides on its own small carrying wheel.
Day told FARM SHOW that one disadvantage of the sprayer is that to use it you have to travel around the field rather than back and forth. "Obtaining 100% coverage with almost no overlap makes up for what-ever disadvantages there may be in some fields," he says, noting that he's used the sprayer on over 3,000 acres with no problems.
Contact: FARM SHOW Followup, Trevor Day, Quamby, Lockhart, N.S.W. 2656, Australia. (069-205590).76

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1987 - Volume #11, Issue #6