I knew Richard Hewitt, the pilot of 'Big Dick'. He was a super nice guy. Wrote a book about his exploits.
Big Dick refers to the roll of the die on the front.....I have to look it up, but that's what's it is there for. Of course his name was also Richard and they did also like the underlying meaning there, as he used to refer to his 51 (during the war as well) as My Big Dick :-)