2 ms·
Hey, a train has airspeed. :)
by hackmiester 3y ago
Hey, a train has airspeed. :)
- mulmen 3y agoHeh, true. I deliberately left out altitude because this is HN but you caught me anyway. Presumably a train's groundSpeed and airSpeed are the same. If they diverge you have bigger problems than a JSON schema. Is there a variant of this for ships? surfaceSpeed vs seaFloorSpeed?
- wasmitnetzen 3y agoA train can easily run in a head- or tailwind in the same order of magnitude as its groundspeed.
- skykooler 3y agoI've been tempted to mount a small anemometer to my car - by subtracting the groundspeed from the measured airspeed, one can get the wind speed and direction and figure out whether there is a headwind or tailwind and if so how strong. Theoretically this could be used to drive more efficiently, though the extra drag from the anemometer would probably cancel out any gains.
- mulmen 3y agoWow I got HN’ed twice in one thread. This is not my day.
- temp365984365 3y agoWell, ships have apparent wind vs real wind and apparent course vs real course (currents and drift are a thing).