cstross, "Problems with this fuel include its toxicity and its characteristic of bursting into flame on contact with the air. Furthermore, its exhaust (when used in a jet engine) would also be toxic." https://en.wikipedia.org/wiki/Pentaborane(9)
cstross, "Problems with this fuel include its toxicity and its characteristic of bursting into flame on contact with the air. Furthermore, its exhaust (when used in a jet engine) would also be toxic." https://en.wikipedia.org/wiki/Pentaborane(9)