srbmod From United States of America, joined Mar 2001, 16896 posts, RR: 51 Reply 1, posted (1 year 10 months 1 week 5 days 12 hours ago) and read 2156 times:
The caption of the photo says that the plane was made rigid by low air pressure. It appears that the only structures on this a/c were the engine mount and the cockpit.