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  1. jedidia

    amount of gas needed to keep up mass flow rate

    Thanks for the pointers to the Electron, guys! I can't seem to find much details about their batteries, but it does sound impressive. I've thought of Tesla, obviously, but one of the things that makes me very hesitant is... Lithium on the Moon. Exists, but getting tons of it together is a steep...
  2. jedidia

    amount of gas needed to keep up mass flow rate

    Ok, had some things messed up. The density was a typo, I tend to mix up digits in numbers. It was still wrong though because of some unit conversion kerfuffle. Unfortunately I kerfuffled multiple units and they evened each other out, so after having the (I really think) correct numbers of...
  3. jedidia

    amount of gas needed to keep up mass flow rate

    What units do these need to be in? From what I got together now, the volume flow rate would be 58.1 litres/s, and the chamber pressure would be 710 kPa. Ok, from what I gather, I'd have to multiply m^3/s * Pa, so that would be equivalent to litres/s * kPa. Which leaves me with 41 kW, before...
  4. jedidia

    amount of gas needed to keep up mass flow rate

    Uhm, no... Haven't even thought about temparature yet. But 16000 Kelvin seems somewhat excessive for a chemical thruster, as it seems a bit excessive for... well, pretty much anything apart from maybe a fusion drive 🤪
  5. jedidia

    amount of gas needed to keep up mass flow rate

    Huh, the PDF times out for some reason, but I know it. One of the few things one can find on throttlable aluminium thrusters. That would be very miraculous. I thought the best we can hope for out of Al-LOX is somewhere around 2600 to 2700 m/s, which is what I'm currently designing with. Ah, the...
  6. jedidia

    amount of gas needed to keep up mass flow rate

    I see though that these are massively more powerful motors than what I have in mind (even the SSME outthrusts my little contraption here almost 10fold, much less something like a first stage main engine like the RD-180). The 290 kN I mentioned above should really be about all that I need. Enough...
  7. jedidia

    amount of gas needed to keep up mass flow rate

    Right... The propellant has to overcome that too. Completely forgot about that... 🤦
  8. jedidia

    amount of gas needed to keep up mass flow rate

    I'm thinking about that, the question is how much power would the pump require. The problem with a hybrid is, it's not very feasible to power it by burning some of your propellant, and it might not be feasible to feed it from batteries. Also, pressure is a lot more failsafe than an electrical...
  9. jedidia

    amount of gas needed to keep up mass flow rate

    So here's a question that's hopelessly above my math paygrade but that would be cool to know more exactly than multiplying my thumb with Pi... Let's assume a fictional spacecraft, built on the moon. I'm saying this because it's a hybrid Aluminium/LOX rocket, and those wouldn't make much sense...
  10. jedidia

    Gaming Orbital Cold War

    Going on Zozer's previous works, I'd expect it to be playable without any supplements, but that it will recommend some stuff. Older works of his, like Orbital 2100 (which is one of the very few mid-future systems that I know that manages to keep halfways realistic while also being playable)...
  11. jedidia

    Humor Random Comments Thread

    I'm just glad I am none of the guys that have to update their time libraries for the umpteenth time because bureaucrats keep shuffling things around...
  12. jedidia

    Humor Random Comments Thread

    I would assume so, but I've never checked...
  13. jedidia

    Humor Random Comments Thread

    Simple things are hard, apparently. I never expected to struggle with the meaning of something as simple as "in 30 days", but being tasked with implementing automation for customer data removal and notification thereof, I feel like I need a lawyer... 🤦‍♂️
  14. jedidia

    News Contact lost with 777-200ER of Malaysia Airlines

    70 million? Wow, somebody really wants to know...
  15. jedidia

    Project Das Fliewatüüt

    My head canon is still that Mr. Clete did not fully die when crashing down a gorge in the mountains outside Ankh-Morpork, but that his spirit found a way to our reality (it's happened before...) and founded GEMA... 🤷‍♂️
  16. jedidia

    General Question Using a Chat app to simulate interactive communications ...

    Actually not so much. Without player cooperation, it's almost impossible to keep them from going off-track and introducing stuff into your game that you really didn't want in there. In case of orbiter that would be fine, as player cooperation can be assumed as given when somebody installs an...
  17. jedidia

    Gaming Orbital Margins

    The maybe most significant update of my game, at least for orbinauts: Orbital margins, now with actual orbital mechanics! Take on the new challenge as you don't just manage your money and your DV, but also your time! https://randomactsofconstruction.itch.io/orbital-margins Latest devlog to go...
  18. jedidia

    News Changes to the SpaceX BFR rocket.

    With how the current administration is set up? When Musk looses interest, I guess... It's probably not long now until he figures out a way to make Nasa pay for it. It was kind of fun to watch while they were being suborbital, but now that they're going orbital and every breakup produces hundreds...
  19. jedidia

    Orbiter Screenshot Thread

    I would rather expect the R.L.S. Legacy...
  20. jedidia

    Updates Artemis Program Updates & Discussions

    So they've found a way to brag about how much money they're spending on the project. Good for them, I guess?
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