Red Dragon Options

[Paolo]

'Red Dragon' Mission Mulled as Cheap Search for Mars Life
any opinion on this? would it really make sense adapting a manned spaceship to unmanned Mars landing? I am skeptical...

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[Kaputnik]

It's been interesting to figure out how Red Dragon is supposed to work, as more details have been released.
When the idea was first mooted, I was extremely sceptical. It seemed that a Dragon would simply have too high a ballistic coefficient to work as a Mars lander.

The key information that has emerged is that Dragon appears to have a very low dry mass, and, crucially, the landing profile relies on a last-moment blast of the retros to produce a 7G deceleration to bring the craft to a soft landing from an approach speed of more than Mach 2.

Given this landing profile, some of the more inventive ideas suggested upthread, such as dropping off additional payloads on the way down, or having propellant in reserve to make a 'hop' after landing, seem IMHO to be all but impossible.

What would be *really* exciting would be if SpaceX were to offer their best price for a dedicated Mars lander, using a more conventional design which would be much more flexible wrt payload, but using their in-house technologies (e.g. PICA-X and Draco), as well as a Falcon launcher, to greatly reduce the cost.