The feller buncher operator makes separate sorts for softwood and the major hardwood species, which are each chipped separately. |
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Two feller buncher teams remain on duty, but these chiefly harvest hardwoods as well as very small diameter softwoods. |
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This voltage accelerates the DC electron beam to a high velocity before injecting it into the grids of the buncher cavity. |
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This cavity is tuned to the same frequency as the input frequency of the buncher cavity. |
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In this process essentially no energy is taken from the buncher cavity, since the average number of electrons slowed down is equal to the average number of electrons speeded up. |
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The decelerated electrons give up energy to the fields inside the buncher cavity, while those that have been accelerated absorb energy from its fields. |
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When the electrons traverse this space, they are subjected to RF potentials at a frequency determined by the resonant frequency of the buncher cavity and the input-signal frequency. |
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A hydraulic feller buncher, which looks like a power shovel with claws and saws, can grasp, cut and delimb a Douglas fir in one terrifyingly swift motion. |
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