Analysis of information sources in references of the Wikipedia article "Scaled Composites" in Slovenian language version.
The mothership is currently known only by its Scaled model number: M351 ...[with design] planned for completion by late summer of next year ... [and to] begin flight testing in late 2015 in Mojave, with rocket test launches from the airplane to begin at Cape Canaveral in late 2016.
In 1991, to address a requirement to launch a booster heavier than 500,000 pounds, [Rutan] did the Model 205 and 206 preliminary designs.
The mothership is currently known only by its Scaled model number: M351 ...[with design] planned for completion by late summer of next year ... [and to] begin flight testing in late 2015 in Mojave, with rocket test launches from the airplane to begin at Cape Canaveral in late 2016.