 2 Operational Research concluded that, from a sample of 40 Sherman tanks, 33 tanks burned (82 percent) and 7 tanks remained unburned following an average of 1.89 penetrations.In comparison, from a sample of 5 Panzer IV's, 4 tanks burned (80 percent) and 1 tank remained unburned, following an average of 1.5 penetrations.The Panther tank burned 14 times (63 percent) from a sample of 22 tanks and following 3.24 penetrations, while the Tiger burned 4 times (80 percent) out of a sample of 5 tanks following 3.25 penetrations.