ened ▁structures ▁against ▁which ▁conventional ▁bomb ing ▁had ▁proved ▁in effect ive . ▁ ▁History ▁Wall is ▁presented ▁his ▁ideas ▁for ▁a ▁ 1 0 - ton ▁bomb ▁in ▁his ▁ 1 9 4 1 ▁paper ▁A ▁Note ▁on ▁a ▁Method ▁of ▁Att ack ing ▁the ▁A xis ▁Pow ers , ▁which ▁showed ▁that ▁a ▁very ▁large ▁bomb ▁expl oding ▁deep ▁under ground ▁next ▁to ▁a ▁target ▁would ▁transmit ▁the ▁shock ▁into ▁the ▁found ations ▁of ▁the ▁target , ▁particularly ▁since ▁shock ▁waves ▁are ▁transm itted ▁through ▁the ▁ground ▁more ▁strongly ▁than ▁through ▁air . ▁ ▁Wall is ▁designed ▁the ▁" V ict ory ▁Bom ber " ▁of ▁ 5 0 ▁tons , ▁which ▁would ▁fly ▁at ▁ ▁at ▁ ▁to ▁carry ▁the ▁heavy ▁bomb ▁over ▁, ▁but ▁the ▁Air ▁Ministry ▁opposed ▁a ▁single - b omb ▁aircraft , ▁and ▁the ▁idea ▁was ▁not ▁purs ued ▁after ▁ 1 9 4 2 . ▁ ▁The ▁design ▁and ▁production ▁of ▁T all boy ▁was ▁done ▁without ▁a ▁contract ▁on ▁the ▁initi ative ▁of ▁the ▁Ministry , ▁following ▁Wall is ' ▁ 1 9 4 2 ▁paper ▁S pher ical ▁Bomb — Sur face ▁Tor ped o ▁and ▁the ▁design ▁of ▁the ▁" b oun cing ▁bomb " ▁for ▁the ▁Dam ▁B ust ers ▁of ▁Operation ▁Ch ast ise . ▁As ▁such , ▁the ▁R AF ▁used ▁bomb s ▁that ▁they ▁had ▁not ▁bought ▁and ▁which ▁were ▁still ▁the ▁property ▁of ▁V ick ers ▁the ▁manufact urer . ▁This ▁situation ▁was ▁normal ised ▁once ▁their