On Fri, Jul 24, 2015 at 10:15 AM, Ethan McKinney <ethan.mckinney@gmail.com> wrote: > It was a laser drive, not fusion. Cut the Kzinti ship in half. I am kinda thinking it was the big Bussard ram jet that powered Human sublight ships before the humans acquired the standard hyperdrive from the Outsiders. https://en.wikipedia.org/wiki/Bussard_ramjet And I seem to recall that the exhaust was radioactive and potentially fatal for things that travelled through the exhaust. Although with the Bussard ramjet ships being slower than light, the ships also had multi-megawatt interstellar range output comm lasers, which the crews *also* did not consider to be "weapons". http://scifi.stackexchange.com/questions/24455/which-novel-or-short-story-was-the-first-to-utilize-a-bussard-ramjet Although there's a reference to dooing the same thing with the comm laser, here: https://books.google.com/books?id=ZmIEJYPptU4C&pg=PA561&lpg=PA561&dq=bussard+ramjet+niven+angel%27s+pencil&source=bl&ots=kn2U6p3a77&sig=qpRpVO-fbMR_Fr9KewuuLyLo2SM&hl=en&sa=X&ved=0CEYQ6AEwB2oVChMIwpiZ8ZX0xgIVyFs-Ch2CjQpv#v=onepage&q=bussard%20ramjet%20niven%20angel%27s%20pencil&f=false Dan -- "Any sufficiently advanced parody is indistinguishable from a genuine kook." -Alan Morgan