View Full Version : Metric system

08-21-2005, 10:03 AM
Can I display speed and altitude in feet/knots instead of meters/kph?

08-21-2005, 10:52 AM
Yes. You have to set up a key to do this. Go into Controls and look for something like "toggle speed bar". Its in the MISC section very close to the bottom of the page.

In game the speedbar will cycle through the following:
Miles per hour


08-21-2005, 12:15 PM
Out of interest, what exactly is the difference between knots and mph? They seem mostly the same to me, give or take 20.

08-21-2005, 12:42 PM
Knots are nautical miles per hour. 1 knot=1.15 statute (land) miles per hour, and 1.85 km/hr.

08-21-2005, 01:21 PM
Ah, right. But why the need for a nautical miles per hour?

08-21-2005, 01:33 PM
"... The nautical mile was based on the circumference of the earth at the equator. Since the earth is 360 degrees of longitude around, and degrees are broken into 60 so-called "minutes", that me"ans there are 360 * 60 = 21,600 "minutes" of longitude around the earth. This was taken as the basis for the nautical mile; thus, by definition, 1 minute of longitude at the equator is equal to 1 nautical mile. So the earth is ideally, by definition, 21,600 nautical miles (and 21,600 "minutes" of longitude) in circumference at the equator. If anyone ever asks you how far is it around the earth, you can quickly do the math in your head (360 degrees * 60 minutes per degree) and answer "about 21,600 nautical miles"!

08-21-2005, 01:38 PM
While it was explained why it was used widely in today's aviation, I still find kph (or mph, depending from what country you are) more understandable for me.

It can be quite confusing when one fly German and Russian planes for a while then switch to UK planes.

Hurricane has knots as measure for speed. US planes have miles per hour..

08-21-2005, 04:18 PM
Ah, thanks for the explanation. You do indeed learn something every day...

han freak solo
08-21-2005, 06:19 PM
US aircraft use knots, too. In the game it could be a mix of the two. MPH and Knots, that is.

08-21-2005, 11:46 PM
US Navy and Marine Corps planes use knots, USAAC planes use mph.

08-22-2005, 04:38 AM
It gets worse: Indicated, Calibrated, Equivalent and True are all different flavors of airspeed.

Good explanation here though: http://forum.lockon.ru/showthread.php?t=8319