Lufthansa flying boats employed mid ocean catapult ships to cross the Atlantic. The British accomplished the same thing by inventing a practical means of aerial refueling.
Is there any reason a tandem engine military aircraft couldn't employ the newly invented aerial refueling system?
Even 'failed' attempts to achieve the mark can be interesting: XP-67 first flight: Jan 6, 1944. First fighter a/c designed built by McDonnell, powered by 2 x Continental ( ) 1430 engines producing 1350 hp. exploited exhast gases to increase engine thrust: