The fw 190 was fitted with various anti tank armerments such as air two ground rockets and hevey anti tank cannons fitted under wing were more than capable of punching through the top armore of a sherman or even a t-34.
In theary the corsair could only carry five or six napalm bombs, I read that a napalm hit within 50 feet would kill a tank, The germans [ and japanise for that matter] rarly had more than one tank in a 50 feet radios, so lets asume that it takes one napalm bomb to kill a tank. I will be generous and say that a corsair can kill 10 tanks on any given sortie. Mean while it is thearyeticly posible, I am not saying that it ever apened, That a cannon armed plane could destroy up to 30 tanks in any given sortie. Napalm was more efective against tank masses and would not have wiped out the german tank force. I do have to admit if the germans had napalm they would have killed thousinds of russian tanks, the russians perfered massed tank attacks.