Jonathan Edwards 18.29m [World Record] Phase I Vcontact = 10.51 m/s Vtakeoff = 9.84 m/s Vdifferential (phase) = 0.67 m/s Retained Speed = 9.84 m/s = 93.6% Lost Speed = 0.67 m/s = 6.4% Overall Retained Speed = 9.84 m/s = 93.6% Phase Transition Drag (I->II) Vtakeoff = 9.84 m/s Vcontact = 9.55 m/s Vdifferential (phase) = 0.29 m/s Retained Speed = 9.55 m/s = 97.1% Lost Speed = 0.29 m/s = 2.9% Overall Retained Speed = 9.55 m/s = 90.9% Phase II Vcontact = 9.55 m/s Vtakeoff = 8.58 m/s Vdifferential (phase) = 0.97 m/s Retained Speed = 8.58 m/s = 89.8% Lost Speed = 0.97 m/s = 10.2% Overall Retained Speed = 8.58 m/s = 81.6% Phase Transition Drag (II->III) Vtakeoff = 8.58 m/s Vcontact = 8.09 m/s Vdifferential (phase) = 0.49 m/s Retained Speed = 8.09 m/s = 94.3% Lost Speed = 0.49 m/s = 5.7% Overall Retained Speed = 8.09 m/s = 77.0% Phase III Vcontact = 8.09 m/s Vtakeoff = 7.27 m/s Vdifferential (phase) = 0.82 m/s Retained Speed = 7.27 m/s =89.9% Lost Speed = 0.82 m/s = 10.1% Overall Retained Speed = 7.27 m/s = 69.2% Overall Net Retained Speed = 7.27 m/s = 69.2% Net Lost Speed = 3.24 m/s = 30.8% Speed Loss Breakdown Phase I contact = 0.67 m/s = 6.4% [20.7% of Total Lost Speed] Phase II contact = 0.97 m/s = 9.2% [29.9%] Phase III contact = 0.82 m/s = 7.8% [25.3%] Ground Friction Total = 2.46 m/s = 23.4% [75.9%] Phase IàII Drag = 0.29 m/s = 2.8% [9.0%] Phase IIàIII Drag = 0.49 m/s = 4.7% [15.1%] Air Friction Total = 0.78 m/s = 7.4% [24.1%]