Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-17 Thread Jon Stockill
On Thu, 16 May 2002, Julian Foad wrote: John Wojnaroski wrote: I recall reading an article several years ago in a flying mag (can't remember exactly where or when) on someone's proposal to change the number of degrees on the compass from 360 to 400. ... Have you noticed

[Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Melchior FRANZ
* [EMAIL PROTECTED] -- Thursday 16 May 2002 16:25: After reading this story I can't help but note another advantage of SI: easy-to-remember figures. 0 degrees celsius is where water freezes, 100 degrees is where water boils, and a liter of water weighs one kilogram. *) [...] *) I know, its

[Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Melchior FRANZ
* Melchior FRANZ -- Thursday 16 May 2002 16:35: ... and the SI unit for temperature is Kelvin, no? :- OK, OK. Degree Celsius is a so-called Derived SI Unit. :-) m. ___ Flightgear-devel mailing list [EMAIL PROTECTED]

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Curtis L. Olson
Melchior FRANZ writes: * [EMAIL PROTECTED] -- Thursday 16 May 2002 16:25: After reading this story I can't help but note another advantage of SI: easy-to-remember figures. 0 degrees celsius is where water freezes, 100 degrees is where water boils, and a liter of water weighs one kilogram.

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Jon S Berndt
On Thu, 16 May 2002 09:48:06 -0500 (CDT) Curtis L. Olson [EMAIL PROTECTED] wrote: ... and the SI unit for temperature is Kelvin, no? :- So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) One of the worst things about metric,

[Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Melchior FRANZ
* Curtis L. Olson -- Thursday 16 May 2002 16:48: Melchior FRANZ writes: ... and the SI unit for temperature is Kelvin, no? :- So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) There's no contradiction, as far as I see: degree comes

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Christian Mayer
Jon S Berndt wrote: On Thu, 16 May 2002 09:48:06 -0500 (CDT) Curtis L. Olson [EMAIL PROTECTED] wrote: ... and the SI unit for temperature is Kelvin, no? :- So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) One of the

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread John Wojnaroski
So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) I recall reading an article several years ago in a flying mag (can't remember exactly where or when) on someone's proposal to change the number of degrees on the compass from 360 to

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Curtis L. Olson
John Wojnaroski writes: So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) I recall reading an article several years ago in a flying mag (can't remember exactly where or when) on someone's proposal to change the number of

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Christian Mayer
John Wojnaroski wrote: So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) I recall reading an article several years ago in a flying mag (can't remember exactly where or when) on someone's proposal to change the number of

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Julian Foad
John Wojnaroski wrote: I recall reading an article several years ago in a flying mag (can't remember exactly where or when) on someone's proposal to change the number of degrees on the compass from 360 to 400. ... Have you noticed Deg/Rad/Grad or DRG on every scientific calculator? Those

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Alex Perry
Christian said: (Note: degrees are still valid as they are *internationally* well known. slugs aren't) Yes they are ... each country's definition depends on local climate and fauna, ranging from one gram, through one ounce to as high as one pound. I don't know of a slug being one kilogram but

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Christian Mayer
Alex Perry wrote: Christian said: (Note: degrees are still valid as they are *internationally* well known. slugs aren't) Yes they are ... each country's definition depends on local climate and fauna, ranging from one gram, through one ounce to as high as one pound. I don't know of a

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Andy Ross
Curtis L. Olson wrote: So what is the SI unit for direction/heading? Certainly they wouldn't overload unit names, right? :-) Oooh, here's a good one! There *are* no unit names for angles. Angles are unitless numbers. So to be strict, the SI unit for heading must be the radian. :) FWIW,

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Jon S Berndt
On Thu, 16 May 2002 18:46:16 +0200 Christian Mayer [EMAIL PROTECTED] wrote: Christian said: (Note: degrees are still valid as they are *internationally* well known. slugs aren't) Alex responded: Yes they are ... each country's definition depends on local climate and fauna, ranging

[Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Melchior FRANZ
* Julian Foad -- Thursday 16 May 2002 18:27: Have you noticed Deg/Rad/Grad or DRG on every scientific calculator? Those are Grads. I've heard that the military use them ... but I haven't seen any evidence of it. Infantery and artillery use 0-6400 mil (called Strich over here), NBC also uses

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread Andy Ross
Christian Mayer wrote: (Note: degrees are still valid as they are *internationally* well known. slugs aren't) Actually, there's a very good reason why we use a 360 degree circle. This number has loads of small integer divisors. What's the inner angle between the walls of a 4-sided room? 90

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-16 Thread C. Hotchkiss
Andy Ross wrote: Christian Mayer wrote: (Note: degrees are still valid as they are *internationally* well known. slugs aren't) Actually, there's a very good reason why we use a 360 degree circle. This number has loads of small integer divisors. ...In the days before calculators, this

[Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Melchior FRANZ
* Christian Mayer -- Wednesday 15 May 2002 17:39: David Megginson wrote: /environment/pressure-inhg /environment/density-sea-level-slugft3 [...] But I'm really concerned that these values aren't in SI units. So most of the world (except the US and perhaps a few other countries) can't

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread John Check
On Wednesday 15 May 2002 12:12 pm, Melchior FRANZ wrote: * Christian Mayer -- Wednesday 15 May 2002 17:39: David Megginson wrote: /environment/pressure-inhg /environment/density-sea-level-slugft3 [...] But I'm really concerned that these values aren't in SI units. So most of the

[Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Melchior FRANZ
* Andy Ross -- Wednesday 15 May 2002 18:44: Typical (North American, anyway) altimeters still report feet, VSI indicators read in fpm, etc... Same here. But please don't tell me that US meteorologist work with slugft3. PS: I withdraw my estimatian that 90% of the world are using SI-units. I

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Tony Peden
--- Melchior FRANZ [EMAIL PROTECTED] wrote: * Andy Ross -- Wednesday 15 May 2002 18:44: Typical (North American, anyway) altimeters still report feet, VSI indicators read in fpm, etc... Same here. But please don't tell me that US meteorologist work with slugft3. Don't be so quick to

[Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Melchior FRANZ
* Tony Peden -- Wednesday 15 May 2002 19:47: Meters are not better than feet, just different. [...] Yes, obviously. It's the words international and standard that make the difference. But these a quite essential details. And it would be quite poor if US universities taught anything else than SI

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread James A. Treacy
On Wed, May 15, 2002 at 10:47:03AM -0700, Tony Peden wrote: --- Melchior FRANZ [EMAIL PROTECTED] wrote: * Andy Ross -- Wednesday 15 May 2002 18:44: Typical (North American, anyway) altimeters still report feet, VSI indicators read in fpm, etc... Same here. But please don't tell

[OT] Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Curtis L. Olson
James A. Treacy writes: Of course, I am constantly reminded of my US background when I tell the Scouts in my troop to cut a 6' piece of line and get blank stares. They want me to say 2m. At the same time almost none of them can tell me their 'weight' in kilograms. I remember when I was in

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread Christian Mayer
James A. Treacy wrote: SI is a real international standard, while 'english' units are just a mess. Of course, I am constantly reminded of my US background when I tell the Scouts in my troop to cut a 6' piece of line and get blank stares. They want me to say 2m. At the same time almost

Re: [Flightgear-devel] Re: Environment subsystem status

2002-05-15 Thread James A. Treacy
On Thu, May 16, 2002 at 12:07:21AM +0200, Christian Mayer wrote: Anyway to come back to the thread: isn't your story a proof that SI should be used? Proof? That's a bit strong. I'm somewhat torn on this issue. Having grown up using english units, I have a (small) soft spot for them. On the