It was a bit tight in the front seats of a Vulcan to wear a bonedome
.. a bit off thread and perhaps more suited to AH&N, but ISTR an ageing aviator (when I was a young one!) telling me the Vulcan was originally designed for a single pilot, hence the lack of lateral space in the cockpit??
And even further off thread, didn't "The Right Stuff" strongly imply that Chuck Yeager "invented" the bonedome by modifying a football helmet???