Yes, but it will depend on the type of payload. If an TSTO is lower
price per pound to a higher inclination/altitude orbit, and it's bulk
dense cargo, the TSTO will win.
On 2019-05-25 09:51, William Claybaugh wrote:
Rand:
So? Price sensitive customers will go with the best pricing. Those
that cannot design their payload for the available throw mass will go
on a bigger SSTO....
Bill
On Sat, 25 May 2019 at 06:45, Rand Simberg <simberg@xxxxxxxxxxxxxxx>
wrote:
For a specific destination, yes, but the off-nominal performance of
SSTO
is much worse than for a two stage, which is much less sensitive to
altitude and inclination.
On 2019-05-25 09:38, William Claybaugh wrote:
David:adds
SSTO is cheaper than a TSTO of the same dry mass because staging
about 10% additional integration cost (assuming expendables,reusables
cost still more due to recovery and refurbishment costs).best
However, TSTO throws more payload into orbit than an SSTO; the
anyone has ever done with any rocket is about 5% payload (Spacean
Shuttle, counting the Orbiter as payload) and so it follows that
SSTO w/ that payload fraction will be lower cost than any similardry
mass and payload multi-stage vehicle.as
This thought experiment overlooks the effect of technology (any
technology that allows 5% payload on an SSTO should improve a TSTO
well) but a more detailed analysis will show that the effect isvery
small: at 5% payload the advantages of staging become small.wrote:
Bill
On Sat, 25 May 2019 at 04:24, David Summers <dvidsum@xxxxxxxxx>
the
I sense something I could learn from!
Why do you say 5% to be the economical msss ratio? What drives
themnumbers?
My guess: engine cost is much higher than tankage, and you drop
thiswith the tanks?
On Sat, May 25, 2019, 12:08 AM William Claybaugh
<wclaybaugh2@xxxxxxxxx> wrote:
Craig:
Are you being a jerk on purpose or have you just not followed
ifconversation?
Second stage of the Saturn 5 was also capable of expendable SSTO
economic.re-engined with SSME’s. Expendable SSTO has be technically
feasible since the late 1950’s; it simply hasn’t been
wrote:Nor will it be until 5% payload fractions are achievable.
Bill
On Fri, 24 May 2019 at 19:01, Craig Fink <webegood@xxxxxxxxx>
On Wed, May 22, 2019 at 7:34 PM Henry Spencer
<hspencer@xxxxxxxxxxxxx> wrote:
On Wed, 22 May 2019, anthony@xxxxxxxxxxx wrote:
Wasn’t the former Titan capable of SSTO, assuming a practical“zero”
payload?
The Titan II first stage could even carry a token payload into
orbit,
maybe 1t or so if you did things just right
Hi Henry,
Titan was a missile, how many 1t weapons did it take to orbit?
Or, Ascents did it perform SSTO?
--
Craig Fink
WeBeGood@xxxxxxxxx
