I've spent *years* trying to get the relevant reports, finally got one of 'em a few weeks back. This is the 1955 configuration of the Bell MX-2276... the predecessor to BoMi, to RoBo, to Dyna Soar and to Shuttle. While the initial 1953 reports continue to elude me, the report form '55 indicates that this design is the same configuration. So... here it is, the very first one.