Timeline for Why was the LRV's speed gauge displaying metric units?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| May 22, 2020 at 21:31 | history | edited | DrSheldon |
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| S Aug 1, 2019 at 12:45 | history | mod moved comments to chat | |||
| S Aug 1, 2019 at 12:45 | comment | added | called2voyage♦ | Comments are not for extended discussion; this conversation has been moved to chat. | |
| Jul 31, 2019 at 15:00 | history | tweeted | twitter.com/StackSpaceExp/status/1156580389709864961 | ||
| Jul 30, 2019 at 21:53 | history | became hot network question | |||
| Jul 30, 2019 at 20:09 | answer | added | DrSheldon | timeline score: 8 | |
| Jul 30, 2019 at 15:04 | answer | added | Uwe | timeline score: 8 | |
| Jul 30, 2019 at 14:30 | comment | added | Uwe | The speed gauge looks like a simple moving coil meter to indicate analog current or voltage. Nothing digital, no semiconductors. Just an electromechanical meter used during the sixities and seventies. | |
| Jul 30, 2019 at 14:22 | comment | added | Magic Octopus Urn | @Uwe wait, so they would've made the changes mechanically, not using software? That's a great point. I forgot how mechanical those parts were! | |
| Jul 30, 2019 at 14:21 | comment | added | Uwe | @StarMan No converting to U.S customary units was necessary, just a replacement of the analog scale of the speed gauge. | |
| Jul 30, 2019 at 14:20 | comment | added | Magic Octopus Urn | @StarMan a single op for multiplication by a scalar isn't too expensive, right? Not sure if that's the reason but it might be. Then again I cannot find anything concrete as to why the gauge is in km/h so we're kind of just guessing hah. This is one of those things we're probably overthinking. | |
| Jul 30, 2019 at 14:16 | comment | added | Star Man | My guess is that it stored its units in metric internally but converting it into U.S customary units was a waste of computing power and as @MagicOctopusUrn said, they're not going that fast and don't really need it to be converted. | |
| Jul 30, 2019 at 14:09 | comment | added | Magic Octopus Urn | Weird... you'd expect 20km/h to be the top speed or something... NASA states the LRV's intended top speed was 13km/h... but that could just be the mission limits set by people because someone went 18km/h: "the rovers were designed with a top speed of about 8 mph (13 km/h), although Eugene Cernan recorded a maximum speed of 11.2 mph (18.0 km/h)". It may be a safe bet that the "hard-coded" top speed would be 20km/h-- meaning why display the gauge in mph with a top speed of 12.47mph? (This is obviously conjecture) | |
| Jul 30, 2019 at 14:01 | comment | added | Uwe | Temperatures were indicated in Fahrenheit. But which units were used for distance and range? | |
| Jul 30, 2019 at 13:52 | history | asked | DarkDust | CC BY-SA 4.0 |