Charged particle trajectories have been reconstructed in pp collisions with transverse energies ( E t) ranging from 1 GeV to 20 GeV. Data were collected by triggering on E t in a highly segmented calorimeter with full azimuthal coverage. Minimum bias triggers were also used. Valence quark effects are known to appear at low E t in the differences between positive and negative particle multiplicities in the forward direction. We reproduce these known prominent effects at low E t, but find them not present in the collisions with large E t, disappearing by about E t=8 GeV. Furthermore, events with high planarity do not show a strong forward net flow of charge and disagree with the predictions of ISAJET. The results suggest that for the triggers studied, more than a single pair of proton constituents scatter at this energy.