toastedcrumpets
toastedcrumpets t1_j16jk42 wrote
Reply to comment by KnightDuty in Court ruling: High earners can't prevent media accessing their tax data. by FINCoffeeDaddy
I member
toastedcrumpets t1_ityqcoe wrote
Reply to comment by the_zelectro in US Space Systems debriefs Jeff Bezos and Blue Origin executives on military space weapon applications and opportunities by upyoars
Hydrogen isn't "better for the environment". You're assuming we get hydrogen for free. At the moment, most hydrogen is created through steam reforming of methane, thus methane, right now, is greener than hydrogen just because you save the energy cost of the reforming process.
Hydrogen is harder to store, has a lower energy density by volume, and is massively more dangerous than methane thanks to its enormous flammibility limits and its high flame front speed leading to larger explosion overpressures. Hydrogen has more energy by mass, but mass is not that relevant thanks to its enormous volume requirements forcing structural masses to be larger (just look at the size of hydrogen rockets versus falcon 9).
You could argue that hydrogen can be made via water electrolysis and renewable energy in the future, but this is also true for methane being made from water and carbon dioxide. What is also interesting is that SpaceX is betting its entire Mars architecture on getting the 2xH2O+CO2->CH4+2xO2 chemistry working via the Sabatier process. It is also a step in carbon capture and reutilisation, a key technology if we're to reduce CO2 emissions.
Overall, hydrogen is not the solution to the energy crisis or the solution to rocketry. The solution to the energy crisis is decarbonisation of energy production (no need for hydrogen at all there, just use batteries, solar, and wind). The solution for rocketry around the solar system seems to be methane, with the only possible exception being the moon which has no carbon source.
toastedcrumpets t1_j25g5n2 wrote
Reply to comment by MudSling3r42069 in SpaceX launches 54 upgraded Starlink internet satellites and nails rocket landing at sea in 60th flight of the year by ovirt001
There were two parts to that Ukraine blacking out story. First was that they were charging for starlink after providing free initial access (terminals were bought by someone else). To be fair, this was clearly stated at the beginning, is normal capitalism, and the only reason the change was painful was because the service was so useful. This should have been a simple case of starlink's CEO saying someone has to pick up the tab but they'd offer it at cost, and it should have been a PR win.
The second was that starlink is blacked out in any areas under russian control, or being contested by Russia. This included the front lines for Ukraine which was a point of complaint. This is something outside starlink's control, embargoes against tech support of Russia are clear. You can bet the US government/military is telling starlink exactly when and where to enable it's service. For example, Starlink is active in Iran precisely to support US interests thanks to special exception even though this is illegal due to the overall sanctions in place.
All of this could have been handled by a competent PR department, but it's not something Elons companies have, deliberately so.