Travel time to mars?

On Jan 12, 10:24*am, " wrote:
I believe with chemical propulsion its commonly believed to be about a
year each way. thats a long time

What if aerobreaking were used?

The manned portion would detach and dive perhaps repeatedly into the
atmosphere to slow for landing.

This would mean the transit vehicle would only accelerate on its way
to mars cutting travel time.

on a return from mars to earth could a capsule be built like apollo to
survive a full speed return?

Mars Hohmann is about a 8.5 month trip. Or about 250 days.

Mars Global Surveyor and Mars Reconnaissance orbiter each used
hundreds of drag passes over 4 to 5 months to achieve Mars orbital
insertion.
http://spacecraftkits.com/MGSFacts.html
http://www.spaceref.com/news/viewpr.html?pid=20710
http://hop41.deviantart.com/gallery/7438029#/d23v2fq

There is a Mars Semi Direct scheme that employs two aggressive drag
passes to achieve Low Mars Orbit.
http://www.marsdrive.com/Libraries/D...Mars.sflb.ashx
Trip time is somewhat shorter than a standard Hohmann, 200 days
instead of 250 days.

On Jan 16, 6:51*am, Fred J. McCall wrote:
" wrote:

currently the shuttle program is ending primarily becaused its killed
2 crews.

if it wasnt for columbia it wouldnt be shutting down

Oh, don't be an idiot. *The program is shutting down because the
vehicles are bloody ancient, expensive to operate, and the only way
we'll ever be able to afford to do anything different is to stop
spending preposterous sums of money on upkeep and maintenance of them.

These things are almost 30 years old, Haller, except for Endeavour,
which is only 10 years younger.

--
"Some people get lost in thought because it's such unfamiliar
*territory."
* * * * * * * * * * * * * * * * * * * --G. Behn

the program was given a termination date because of safety concerns,
by the columbia investigation board. who said either recertify or quit
flying