The fact that they can't seem to raise £200M (2013) [1] to build a prototype does seem either troubling about its feasibility OR indicative that something's ver

The fact that they can't seem to raise £200M (2013) [1] to build a prototype does seem either troubling about its feasibility OR indicative that something's very wrong with capital markets (or that they're working on traditional military aerospace "we'll get it done in 10 years" pace). On the other hand, I'm sure harnessing explosions to propel heavier than air craft into orbit also seemed insurmountably technically impossible at one point. [1] http://www.bbc.com/news/science-environment-23332592 http://www.bbc.com/news/science-environment-23332592