wizzlebippi

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About wizzlebippi

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    Spacecraft Engineer

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  1. wizzlebippi

    KSP Weekly: The Solar Visit

    @SQUAD Is any of this, including the expansion, coming to consoles?
  2. wizzlebippi

    KSP Weekly: Ultima Thule

    Since my aging laptop decided it no longer needed a screen, I've been playing on Xbox. Seeing all the improvements pc is getting is nice, but consoles don't have making history, or even a clear future. It's really hard to justify a new machine for one game, even if I have nearly a thousand hours in it, when something I already have will play ksp. Are consoles going to get making history and these updates? Not looking for a date or schedule, only a yes/no answer.
  3. wizzlebippi

    Jet engines and compressors

  4. wizzlebippi

    Jet engines and compressors

    Because the process of compressing air slows the air down. The compression/deceleration process starts at the intake on all jet engines, slowing it to less than 0.3 Mach before it reaches the compressor. This is because below 0.3 Mach, air can't be aerodynamically compressed. From there, multiple compressor stages mechanically work the air. These can be numerous axial rotor/stator stages, or on some engines, a few axial stages and a large centrifugal stage before the burners. The idea is the same, something speeds air up and forces it into something stationary to increase pressure. On a ramjet, the intake air is fast enough that aerodynamic compression is enough to operate the engine. No moving parts needed.
  5. wizzlebippi

    KSP Challenge: Impact the Mun!

    At 15:02, I think I'm close to the max of what an xbox can accomplish. Didn't bother to look at the total part count, but those vectors sound like an evil horn.
  6. The fuselage is one awkward airfoil. On conventional aircraft, the fuselage is usually assumed to produce as much lift as the wing area it covers. Assume the chord is the length of the craft, and the area is what you see in your top down view. The easiest way to calculate area on that is to break it down into simpler shapes.
  7. wizzlebippi

    GPS navigator on a space station

    It doesn't even need to be in space. Next time you fly on an airliner, have a navigation app open. Your phone will drop GPS shortly into the takeoff roll because it senses excessive acceleration. For entertainment, if you get the chance to fly on something smaller and slower like a skyhawk, open a navigation app and watch it try to figure out where you are.
  8. wizzlebippi

    For Questions That Don't Merit Their Own Thread

    I might be a savvy engineer, so I'll take a crack at this. Engines work by using a heat source to cause a working fluid to expand as a means of transferring energy from fuel into mechanical energy. The problem is most working fluids don't hold much thermal energy at useful temperatures, limiting the energy output and efficiency of the engine. The solutions are either increasing the operating temperature or increasing the mass of the working fluid. Increasing operating temperature usually isn't an option, at least not by enough to make a difference, due to material properties and cooling. Increasing the size of the engine can dramatically increase energy output by increasing the volume of working fluid, but at the expense of efficiency due to difficulty heating all the working fluid. Compressing the working fluid increases the mass being heated while keeping the volume being heated reasonable, allowing more chemical energy to be captured as heat, resulting in increased energy output and efficiency of the engine.
  9. The problem is transferring gasses to and from your blood relies entirely on pressure. If the pressure of oxygen in the air is less than the pressure of oxygen in your blood, then oxygen moves from your blood to the air in your lungs. Above about 35,000 ft, the ambient pressure is low enough, that the time of useful consciousness becomes constant. This is because there isn't enough air pressure to keep enough oxygen in your blood for you to remain conscious. It then becomes a race of you using oxygen vs. oxygen and other gasses escaping in your lungs. Holding your breath will not stop this because breathing also relies on relative pressure. If you have an FAA medical certificate, you can take a chamber ride for free at the Civil Aerospace Medical Institute.
  10. wizzlebippi

    Enable disabled reaction wheels

    And now it magically works again. I'm not sure what I did to disable the reaction wheels and today they work again.
  11. wizzlebippi

    Enable disabled reaction wheels

    I have a ship with an mk1-2 command pod that for some reason has had it's reaction wheels disabled. It has both power and a pilot, and the reaction wheel mode is set to normal. RCS works, but I already ran out of monoprop. How do I dock this ship with the station to salvage its science.
  12. It's not just chord length, but speed as well. Calculate your expected takeoff and cruise Reynolds Numbers. There's a transition around 250-300k, above which airfoil shape matters a lot more. As a point of reference, RC aircraft operate around this transition.
  13. How big will this glider be? If you want to build something large, a sheet or two of foil won't do it, but at the right scale it could get the job done. Also, for small enough wings, the shape of the airfoil doesn't matter as much because even airfoils behave like flat plates.
  14. wizzlebippi

    Contrail

    The engine exhaust also needs to have the correct amount of soot and water vapor for contrails to form. Stealth aircraft have contrail detectors to help them avoid throttle settings that could help the enemy spot them.
  15. wizzlebippi

    Cannae/EmDrive

    I think you're underestimating the cost of testing on earth. The cost of man hours spent designing away test interference has likely greatly exceeded the cost of launching a cube sat. NASA Eagleworks probably spent at least a million just on having independent test experts analyze their rig and findings. Bench testing, or basically all that has been done with the Cannae drive, is inherently flawed. There is always interference from the test setup, despite how carefully designed it may be. It takes a lot of time and money do design out flaws, and even then we can only account for known sources of error. The only way to truely eliminate error due to the test setup, it to put the Cannae drive in space. Yes, if it breaks we may never know exactly why, but if it produces the same amount of thrust in space, we will finally know it's not test error.