Abstract
ABSTRACT A new rotary spreader has recently been introduced that incorporates a helical cone which is rotated to change the drop point of the material onto the impeller, and a new impeller with both straight and forward-curved fins. The new spreader and two conventional spreaders were evaluated using four materials covering the full range of products normally applied with this type of spreader. The new spreader substantially outperformed both of the conventional spreaders. It could be adjusted to deliver an excellent pattern with all of the materials tested. The coefficient of variation for overlapped patterns did not exceed 10% with any of the materials. The spreader was also tested for sensitivity to speed variations and impeller angle. It was no more sensitive than the conventional spreaders.
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