Figure \ref{296393} illustrates that the total power does increase in a quasi-linear fashion as the screw angular velocities are increased. In most cases, the inward churning configurations C2 and C4 exhibited lower power draw than their outward churning counterparts C1 and C3. Less intuitively, the power was found to be approximately constant with minor fluctuations with respect to the load time for a given configuration and angular velocity. Initially it was hypothesized that the drag force generated by the ramp-terrain interaction would lead to higher power draw to maintain the velocity, but this was found to not be the case. In all cases where the ramp does not make contact with the soil (C1 and C3 at 35 and 40 degrees), the power draw is nearly identical to the no ramp control case (0 seconds load time). When the ramp does make contact with the soil, the power draw increases slightly above the no ramp level. 
    It should be noted that the four motors powering the screws consumed the overwhelming majority of the power in all cases. The DC motor actuating the ramp had an astoundingly low power draw of between 0.1-0.2 W, which is one percent of total power. Very low excavation ramp power, coupled with the fact that higher load times do not impose a significant power increase, imply that the most efficient configuration in terms of power per unit excavation rate for this system is the one that maximizes the excavation rate. Furthermore, the supremacy of the inward churning configurations is clear when one considers that the inward churning configurations yield the highest excavation rate, and in most cases draw slightly less power.

Velocity