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why is the US not Metric
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boffin:

--- Quote from: SilverSolder on February 13, 2020, 07:47:15 pm ---
--- Quote from: KL27x on February 13, 2020, 07:33:08 pm ---
--- Quote ---It's the same drill we are talking about, we just call it something more meaningful to us.
--- End quote ---
To be honest, imperial drill bit sizes are not all that meaningful even to me. Anything beyond 8ths, I tend to just measure the screw/pin/dowel with calipers, then find the drill bit with calipers, lol.

There's also the time-tested trick of holding the screw and drill bit together, to see that the threads of the screw are just visible behind the silhouette of the drill bit. :)

--- End quote ---

You haven't lived until you've owned a complete American drill set, including Fractional 1/16" to 1/2" by 64ths,  Letter size drills A - Z, and Number size drills No. 1 - 60!

Really all these could usefully be rationalized to metric sizes, so you don't have to refer to a chart to figure out what is going on every time you need to drill a precise hole...

--- End quote ---


it's also a lot easier to figure out tapping sizes with metric (diameter - pitch), rather than having to consult a chart (metric) with M threads.
KL27x:
Whoa! Data point. No judgement? Welcome back to the discussion, Boffin! It's nice to have you.
tooki:

--- Quote from: Gromitt on February 14, 2020, 05:34:14 pm ---
--- Quote from: tooki on February 14, 2020, 04:45:23 pm ---No they didn’t. The “communist countries” they’re referring to are the actual countries that use metric flight levels. See the link I posted earlier:
--- Quote from: tooki on February 13, 2020, 07:45:47 pm ---
--- Quote from: Gromitt on February 13, 2020, 12:56:38 pm ---
--- Quote from: SkyMaster on February 13, 2020, 02:28:10 am ---
--- Quote from: Tepe on February 12, 2020, 09:27:51 pm ---
--- Quote from: forrestc on February 12, 2020, 05:13:49 pm ---The one major area where pretty much every country in the world has not metricated is aircraft flight levels.

--- End quote ---
Note the altimeter in this Saab J35 Draken ("Höjd m"):

--- End quote ---

Except for some communist countries, nobody in the world is using meter as an altitude unit in aviation.

:)

--- End quote ---

You mean countries with the same level of communism as Canada?  :P

--- End quote ---
Canada is not among the 9 countries in the world that use metric flight levels, either exclusively or partly.

https://en.wikipedia.org/wiki/Flight_level#Metric_flight_levels

--- End quote ---

--- End quote ---

Yes, but the picture is from a Swedish fighter jet with metric instruments.

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Yes, we all know that. But that still doesn’t mean anyone said Sweden was communist.
Tepe:

--- Quote from: tooki on February 15, 2020, 04:08:58 pm ---
--- Quote from: Gromitt on February 14, 2020, 05:34:14 pm ---Yes, but the picture is from a Swedish fighter jet with metric instruments.

--- End quote ---
Yes, we all know that. But that still doesn’t mean anyone said Sweden was communist.

--- End quote ---
Somebody did: "Except for some communist countries, nobody in the world is using meter as an altitude unit in aviation."
KL27x:
^Are you saying that Sweden's airforce uses meters for altitude, today? Or are you talking like 50 years ago?

Someone else mentioned meters being use for sailplane and hang gliders or something like that, in Germany. I'm curious of other examples.

I assume these hang gliders aren't talking with ATC and are only allowed to operate in limited, relatively low altitude areas. And they use metres on their gauges and their education and whatnot, and certifications/testing/licenses.

I can't imagine a country's military using meters and other planes using feet being an advantage, unless you're trying to increase the accident rate and make things hard on their ATC and pilots.

As far as I still know, Skymaster is right, and you are wrong. Unless you change "uses meters" to "has ever used meters." Open and waiting to be corrected and hopefully learn something new.
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