Balloon Diameter (cm) Pressure (Pa) Balloon Diameter (cm) Dart Displacement (m) 7.62 797 7.62 0.1016 10.16 1145 10.16 4.445 12.7 846 12.7 2.9464 15.24 822 15.24 2.7686 17.78 996 17.78 3.6322 20.32 1121 20.32 4.2418 22.86 1220 22.86 4.9784 36.83 1294 36.83 5.5372 48.26 1569 48.26 6.731