SpaceX Starship: Earth Point to Point Transportation

The next step in Starship 15 evolution.
Let’s take a good look at the entire Starship system
and consider something we often hear discussed
but have not seen analyzed.
Starship Point to Point Transport…
Stardate 000.003
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Excerpt:
We will start with the Super Heavy booster by itself…
The SpaceX Super Heavy Booster has a dry mass of 180 tonnes
And a propellant mass of 3,400 tonnes
Giving it a gross mass of 3,580 tonnes.
We break out the rocket equation…
and I use a spreadsheet so I don’t transpose anything as easily…
We see the propellant mass is 3,400 tonnes,
The dry mass is 180 tonnes,
And when we add these, we get 3,580 tonnes.
We take the specific impulse at sea level,
330seconds,
And multiply by 9.81m/s^2 to get the ejection velocity
And put together our rocket equation
DeltaV equals the ejection velocity times the natural log of the initial mass over the final mass.
The initial mass is 3,580 tonnes, the empty or dry mass is 180 tonnes.
That ratio is 19.89, the natural log of 19.89 is 2.99. Multiply 2.99 times the ejection velocity
And we get 9,680 m/s or 9.68 km/s deltaV.
We see that the booster by itself,
With no second stage at all,
Could get into orbit.
It could in fact be a single stage to orbit ship.
And it turns out that we could add up to 16.5 tonnes,
Giving a total final mass of 196.5 tonnes, and still just make it.
Or that could all be fuel to come back and land.
I don’t know how many tonnes superheavy will need to land
but I’m pretty sure it will be more than that.
If it ever goes into orbit its probably doomed.
It depends on the terminal velocity and that depends on many factors…
Thank you so much!

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Видео SpaceX Starship: Earth Point to Point Transportation канала Terran Space Academy