Comment Re:This is a great example. (Score 1) 144
If it is going to cost $50 million (or more!) to build the prototype after $10 or 20 million just to design it and do all of the computations, you'd have to both have a very, very serious plan with a very, very high probability of success
I remember following the late Bussard's ploywell development a few years ago before he passed and before the Navy snapped his team up. They claimed to have actually achieved net fusion in the lab and still needed something like $200 mil just to get the engineering done to scale up to a production size prototype.