School of Agriculture, Food and Ecosystem Sciences - Theses

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Thesis for degree of Master of Agricultural Science

McClelland, J. H ( 1956)

The path of a finger of a conventional side-delivery rake is the volume common to an oval cylinder and two warped prisms (one vertical and one horizontal). The shape of the warred prisms depends on operating speeds and rake geometry: the shape of the oval cylinder depends only on rake geometry and is independent of speed. An experimental rake her been developed. The design ensures that, at any operating speed, the crop is moved in a straight line from the swath to the windrow. There is no chance of intermittent contact between the fingers and the crop; each finger moves a small portion of the crop the full distance from the swath to the windrow. The velocity of crop during its passage is constant. At the same time, the velocity of the fingers relative to the ground is significantly less then the velocity of the fingers of a conventional rake.