An experimental study was conducted to determine the effect of aspect ratio, wall angle and wall offset on the force that results due to the pressure differential across the jet, on a two-dimensional jet in a bistable fluid amplifier. A dimensional analysis was made of the variables involved and a model was constructed to give the variable geometry needed. Data was obtained for aspect ratios of four, six, eight, and ten; offsets of two, four and six nozzle widths; and wall angles of ten, twenty, and thirty degrees. Graphs were made of the pressure gradient near attachment to show the effect of these variables on the resultant force on the jet. Ways of maximizing the force on the jet are suggested from the results obtained.