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by Marcel F. Williams Tuscany is renowned for its beautiful cities of Florence and Siena, and is historically famous as the birthplace ... -
by Marcel F. Williams Congress has now made it clear that they want the immediate development of a heavy lift vehicle and a crew explorato... -
Links and References Was the Swamp Ape Bipedal? Marine Adaptations in Human Kidneys Morphological Evidence of Marine Adapta...
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by Marcel F. Williams America has the best hospitals, physicians, nurses, and medical technicians in the world! Unfortunately, the US also... -
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Some of the SSME (RS-25D) in storage at the Kennedy Space Center (Credit NASA). by Marcel F. Williams N ASA's future Space La...
3 comments:
You will get banned from Parabolic arc if you keep criticizing spaceX Marcel. Word will get around and you will eventually not be able to post anywhere except Dr. Spudis' blog and SpacePolicy online......like me.
That's why its fortunate that I run my own blog:-)
I'm a strong advocate for Commercial Crew development since I believe the private space programs are complimentary to public space programs.
But using the ISS to subsidize the development of Commercial Crew efforts is the most expensive and inefficient means to do so,IMO.
And trying to paralyze the public space program in order to show favoritism towards private space programs hurts both the public and private space programs.
Thanks for your comments!
Marcel
One of the most significant advantages of using ADEPT technology on Mars is that its terminal velocity is only 511 meters/second at about 10 kilometers above the martian surface. Therefore, only 511 m/s would be the delta-v requirement for a vehicle using propellant to softly land on the martian surface. Since the delta-v requirements space vehicles landing on the surface of the Moon from lunar orbit is usually above 2.0 km/s, lunar vehicles using an ADEPT deceleration shield could be used to land payloads on the martian surface.
Larger lunar vehicles capable of round trips to and from the surface of the Moon from one of the Earth-Moon Lagrange points-- on a single tank of fuel-- would also be capable of taking off from the surface of Mars into low Mars orbit.
Marcel
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