for your ultimate weapon i like to call nuke you have to do the following:

choose air strike at the top

choose 1 bomb

put wind affected

detination stops moving

and the results:

land damage:9
blast strength:9
worm damage:9

email me if you dont understand or it wont work
enjoy
harry witt

Well done, you found out how to use the Worms 4 weapon factory. You deserve a medal, seriously.