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U.S. Navy retired the last ones in 2003.

In the U.S., originally known as Armistice Day, changed to Veterans Day in 1954 to commemorate veterans of all conflicts.

OK, everyone ignore Xyon, see if she notices . . . Ready, set, go!🤪 Kiddin'

To some, the focus is on the technical aspect, the checklist, flipping of switches, operating primitive computers to duplicate the real world flights; to others the joy is planning orbits, to get there without missing, more like SpaceX style with touchscreens and let the computers do the grunt...

I also play KSP on occasion, just a distant second to Orbiter. I do kinda like the pull handle style orbit planner, to an extant. :welcome:

OK, what next? If Artemis doesn't launch soon, the SRB's expire and they'll need to reevaluate them to see if they're still flight capable. https://www.space.com/nasa-artemis-1-moon-rocket-boosters-expire-december

Acronymfinder.com, that was the most logical choice.

Maybe the green at 4500 psi +/- 5% for predeployment pressure check?

Another suggestion. In the case of a standard gauge like this in the cabin, if the gauge fails/leaks, there would be a shutoff valve immediately accessible to shutoff the flow of fuel into the cabin. Might wish to install an image of a quarter-turn valve handle or knob somewhere close.

@Urwumpe can speak to the math, he knows it better than I, besides it’s his request. But visual looks great! If a gauge like this is what he likes, a couple suggestions: Looks like you got this from an image of a glycerin-filled gauge, might whiteout the bubble. In space the bubble floating...

Lockyer that! A sailplane with a motor!

I would expect a simple bourdon tube pressure gauge, and wouldn’t even have to be calibrated to psi, Pa, kg/cm3, it could be just 0 to 100% with maybe 0, 25, 50, 75, 100% marks, and maybe a green mark at the 100% point for filling, and red arc at 0 to 25 % at ‘bingo fuel’ time to head home. I...

Enjoy!

欢迎

:welcome: Woof! Woof!

Interesting visual on the rotation rates of Solar System bodies.

For Orbiter, there are the docs that come with the Simulator, of course. Once installed, go to Orbiter\Doc\ folder, start with Orbiter.pdf. A good tutorial is 'Go Play In Space' by Bruce Irving, which can be read from the OrbiterWiki, beginning at...

Oops! Sorry 'bout that.

The DART mission changed the orbit of Dimorphus by something like 32 minutes, much more than anticipated. https://www.space.com/nasa-dart-asteroid-impact-orbit-change-success EDIT It'll be interesting to see if it changes the period of the solar orbit of the Didymos system significantly.

:welcome: to the forum. I just logged off and browsed the add-ons as a guest (use the Orbiter Downloads button above), all the add-ons from OrbiterHangar are here now. There are about 5K add-ons available to anyone not logged in or not members; there are only about 15 that require login to the...