Abstract
In order to find the most suitable structure of thrower, we did this experiment and got following results.
1. Regarding the shape of carrying pipe in case of throwing slant-upward tea-leaves, it was hoped to rather curve than straighten. Because the curved pipe shown by formula Y=(2H/l)X-(H/l2)x2, had a large limit carrying capacity and a high working efficiency.
2. Within the range acting on flow speed in pipe, the larger area of inlet made the larger carrying capacity.
3. On the shape of wing, there was little difference of the carrying capacity between straight and backcurved wings, but the back-slant wing was poor on capacity, not suitable for thrower's one.
4. The power requirement for thrower was below 0.3 PS and carrying work rate too was very small, therefore conveyance efficency was generally low, and did not rise above 5% in the range of this experiment.