Against some of the "Wehrmacht's" heavier tanks, the rockets needed to hit the thin-walled engine compartment or the tracks to have any chance of destroying or disabling the tank. Analysis of destroyed tanks after the Normandy battle showed a "hit-rate" for the air-fired rockets of only 4%. In Operation Goodwood (18 to 21 July), the 2nd Tactical Air Force claimed 257 tanks destroyed. A total of 222 were claimed by Typhoon pilots using rocket projectiles. Once the area was secured, the British "Operational Research Section 2" analysts could confirm only ten out of the 456 knocked out German AFVs found in the area were attributable to Typhoons using rocket projectiles.