Hydrogen tanks have better crumple zones and lower terminal velocities, but
I still think you should consider having a reserve parachute. With a
properly designed entry suit you should be able to eject anywhere!
The Parachute is optional.
https://youtu.be/o2xmAWS4akE?t=100
On Wed, May 22, 2019 at 11:05 AM David Summers <dvidsum@xxxxxxxxx> wrote:
Oh, I don't know, it will probably reach rest with respect to ground. With
a good enough crash couch might even be survivable!
On Wed, May 22, 2019, 12:58 PM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:
Craig:
There is not enough mass reserve on this vehicle to land it after reentry.
Bill
On Wed, 22 May 2019 at 07:24, Craig Fink <webegood@xxxxxxxxx> wrote:
Bill,
Landing Propellant mass fraction used for delta-V should be
significantly less for this prototype than for the Falcon 9 first stage.
The Fly-Back Burn and the Entry Burn are unnecessary, so it's only
necessary to have enough delta-V to slow down from Terminal Velocity to
zero at the ground.
On Wed, May 22, 2019 at 8:51 AM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:
Not fully reusable; there will not be sufficient propellant to land.
Time will tell as SpaceX is walking down a flexible path, they are
apparently taking two paths right now, to their goal. From what I've seen
so far, the landing legs are an integral part of the aerodynamic control
surfaces so probably wouldn't be taken off. Like an aircraft flying across
Pacific, one would not expect the aircraft to carry enough fuel for the
return trip. For a Launch Vehicle, the Destination is LEO, a place to let
passengers and cargo off, take on new passenger and cargo and Refuel for
the return trip. Refueling in LEO is already a goal for this vehicle. When
refueling is added to the Prototype? Time will tell.
Bill
On Wed, 22 May 2019 at 05:47, Craig Fink <webegood@xxxxxxxxx> wrote:
Looks like we are close to seeing the first Single Stage to Orbit--
launch. As a bonus, this launch should be a fully reusable vehicle,
capable
of Entry and Landing. Plus, this accomplishment will be just a step on the
path to his new launch vehicle, as the SSTO is SpaceX's research version
of
Starship's second stage.
https://youtu.be/6IydYEBrk0E?t=413
CloudLicker on Youtube seems to do a good job aggregating SpaceX News
so you don't have to.
Following SpaceX today is what following NASA was like in the 1960s.
All Doing, less Talk. Exciting times ahead.
Craig Fink
WeBeGood@xxxxxxxxx
--
Craig Fink
WeBeGood@xxxxxxxxx
