Nuclear Thermal Rocket Engines
by Brian Wang from NextBigFuture.com on (#6HZ4Z)
There have been full scale nuclear thermal rocket engines built and tested on the ground since the 1960s. The US had the NERVA project. The attraction is that the ISP would be up to triple the ISP of chemical rockets. Nuclear thermal propulsion (NTP) systems work by heating up a gas, usually hydrogen or ammonia, ...