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  1. J

    Passive Flow Jet Control

    Ran across this interesting thesis whilst checking out some Formula 1 tech articles. Got me thinking about rocket boattails. Just thought I'd share the link in case anyone else here find it interesting and get ideas...
  2. J

    What I did today -instead- of Rocketry.

    Worked on getting garden ready for spring/summer plantings. Built 4 new large raised beds and picked up a cu-yd of soil/compost. I think I probably will need 3-4 more cu-yd of material to finish filling them up. Pretty physical work but feels good. In between that garden work, also pulled...
  3. J

    H Motor World Record Build

    I was reading recently about the Krushnik Effect and your comment reminded me a bit of it. I don't know if it actually applies to your build but maybe look into it when you consider the next iteration of your tailcone. You may be loosing thrust. Awesome job though and thanks for sharing...
  4. J

    What are you reading?

  5. J

    NATO relations with Ukraine

    A whole lot has happened in a week, even more so once the China olympics closed. China says they support an independent Ukraine, but they'll probably just watch on the sidelines and take notes for Taiwan. Wouldn't surprise me if they even agreed to buy (more) gas from Russia. It almost seems...
  6. J

    NATO relations with Ukraine

    The Kieven Rus - Belarus, Russia (Moscow), Ukraine (Kiev). https://en.wikipedia.org/wiki/Kievan_Rus%27 Putin being a devout Russian Orthodox Christian. When Vladimir The Great converted basically making it the primary Russian religion, of which Kiev was the center. Ukraine being part of NATO...
  7. J

    NATO relations with Ukraine

    Found another interesting read: https://rusi.org/explore-our-research/publications/commentary/russia-will-not-stop-ukraine
  8. J

    NATO relations with Ukraine

    Found this interesting read on Putin's ideas of what Russia is and means. http://en.kremlin.ru/events/president/news/66181
  9. J

    Where was your first flying field?

    Polo Field in Golden Gate Park SF
  10. J

    What I did today -instead- of Rocketry.

    Where is the tannin mostly from? The skin?
  11. J

    What are you drinking right now?

    Have you heard of the Aerobie flying ring/disc? The guy that invented that was tired of bad coffee so he invented this other device called an Aeropress, which makes a pretty tasty cup in my opinion.
  12. J

    What are you drinking right now?

    Aeropressed coffee with foamed vanilla flavored creamer Any other 'pressers or pourover-ers in here?
  13. J

    What are you reading?

    A couple new ones for me: In Praise of Shadows; Jun'ichiro Tanizaki The Color of Law; Richard Rothstein
  14. J

    William Shatner is going to space. For real.

    Maybe forego the traditional countdown and instead something like this: I imagine the post interview answer to the question of how was it? "It was... <long pause> FUN!. Kirk out"
  15. J

    What I did today -instead- of Rocketry.

    Will get back to you on that after I pick up a couple tall cans somewhere. Video incoming, lol. Actually, I think I have a cocktail shaker somewhere so, definitely shaken and not stirred. TGIF everybody!
  16. J

    What I did today -instead- of Rocketry.

    Made a spray can shaker attachment for my reciprocating saw. Retirement cash cow or keep my day job? :p
  17. J

    Spray paint/can nozzle maintenance?

    I think this is what is going on with a can that I'm currently working with. Put a cleaned nozzle on it, shook for a long time and it still spit instead of sprayed. The can was stored in a fairly hot enclosed patio so this may also be a contributor. Thanks for the tips guys!
  18. J

    Spray paint/can nozzle maintenance?

    Not sure if this is the best forum to ask this; mods please move if necessary: How do you guys maintain your spray can nozzles? I'm having a problem of not fully using the contents of a new spray can and then a month or two later the nozzle doesn't spray properly - mostly spits out the paint...
  19. J

    What I did today -instead- of Rocketry.

    Fixed my seatbelt as the receiver wasn't releasing the buckle. I think it may just have been some debris obstruction as it released soon after I opened it up and wiggled it about. Lubed it up and now seems to work a bit smoother. Good thing the coil is door mounted so I was able to get out by...
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