'Back to the M 52 - a lot of ' If only they had flown' aeroplanes might well have changed the face of aviation...... could make a good TV Documentary series...'
Aviate1138, as mentioned previously, 'Sky' often air a programme about the M 52, and indeed other episodes on 'Aircraft That Never Flew' inc. British post-war projects ( jet / rocket hybrids for instance ), plus interesting ideas some of which did fly inc. German projects - saw one recently mentioning the last-ditch 'Natter' VTO tail-sitter fighter - among other things - and the Canadian Avro Arrow etc.
They also did one on the U.S. attempts at a nuclear powered bomber - does " Well, with our atomic engines we could stay up for 6 months, but we've only got 2 hours radiation shielding ! " Sound familiar ?!