You are correct, to my knowledge we are using a hybrid plutonium fuel but what I was getting at is the weight aspect. One of the greatest design barriers engineers are facing is dealing with the amount of fuel that will be needed to send a spacecraft on deep space round trip missions. More fuel means more weight, and more weight means the need for more fuel to transport that weight. It also means that when we enter the atmosphere of other planets we need additional fuel just to slow down and change direction, consequently we need to transport that fuel a great distance before it is ever used. The point is that we need to get away from a fuel driven propulsion.Posted by The Canceller (here)
Huh? Fossil fuels are not used to power deep space exploration.Posted by rgray222 (here)
Call it by any name atomic energy, nuclear power, core power, critical mass, fission, plutonium, etc, it is absolutely essential that man explore this energy. If not to heat and power the world then to power deep space exploration. We have already reached a critical point where we can no longer explore deep space with any accuracy using fossil fuels . . .
If memory serves me right I believe that the plutonium 238 is a diminishing resource that we are running out of and there is a mad scramble on to replace this fuel source. The bottom line is we need a fuel source that does not need to be pumped in tanks and carried on board. It will be hugely interesting to see the type of energy that carries forward into deep space.
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