WI, the Whirlwind was chosen as the FAA fighter in 1937, to enter service in 1939/40. Given what we know about the Whilwind's high landing and takeoff speed, high stall speed and weight, etc, how do we need to modify Ark Royal and the Illustrious class now under construction?
We're not modifying the Whirlwind beyond adding RDF to find the carrier, folding wings, catapult hooks, arrestor hook, cross tank valve and racks for bombs or tanks.
If you're inclined to post that the Whirlwind is unsuitable, would never be chosen, must be further modified, etc. this is not the thread for you. The boffins at the Admiralty and Air Ministry have spoken, the Whirlwind is their chosen fleet fighter.