Originally Posted by XV277
Early in the MRCA program, there was a 'supersonic' underwing tank with a smaller capacity than the one that entered service. Can't remember the details now, but it was flown on some of the development aircraft.
And yet it's the smaller tanks that are subsonic now; the larger 'Hindenburger' tanks have a supersonic clearance.
Perhaps that smaller one you mention never made it to sqn service.
