On Apr 16, 10:48�am, Fred J. McCall wrote:
" wrote:

For a doable Mars mission you really need a dramatic cut in flight
time, ether a nuclear or ion propulsion for round trip.

Otherwise the consumables, radiation exposure etc becomes a deal
breaker.

All untrue.

--

While its true we COULD do a mars mission with chemical propulsion,
the risks costs and time involved just isnt practical.

like bicycling across the US sure it could be done but commion sense
indicates its not practical.

besides with such a long flight time a mechanical breakdown could see
the entire crew die a long slow death.

a bad day apollo 13......