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Knots  
User currently offlineNotar520AC From United States of America, joined Jul 2001, 1606 posts, RR: 4
Posted (12 years 12 months 4 days 3 hours ago) and read 989 times:

Just a quick answer please- how many mph is a knot? Is there a conversion formula?


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12 replies: All unread, jump to last
 
User currently offlineApuneger From Belgium, joined Sep 2000, 3032 posts, RR: 11
Reply 1, posted (12 years 12 months 4 days 2 hours ago) and read 949 times:

A knot is defined as follows (if I remember well):

If you travel one nautical mile per hour, your speed is exactly one knot.

Therefor, one knot is one nautical mile per hour.

I don't know how many statue miles that is, or how do you call that? However, I do know that it's about 1.5 kilometer, so one knot is more than one statue mile per hour.

Ivan

Plz correct me if I'm wrong



Ivan Coninx - Brussels Aviation Photography
User currently offline777236ER From , joined Dec 1969, posts, RR:
Reply 2, posted (12 years 12 months 4 days 2 hours ago) and read 944 times:

Knot to MPH x1.1515

MPH to Knot x0.8684


Yeah, a knot is one nautical mile per hour


User currently offline777236ER From , joined Dec 1969, posts, RR:
Reply 3, posted (12 years 12 months 4 days 2 hours ago) and read 931 times:

Oh my god, i just realised i know that by heart. That's it, i'm committing myself now.


User currently offlineNotar520AC From United States of America, joined Jul 2001, 1606 posts, RR: 4
Reply 4, posted (12 years 12 months 4 days 2 hours ago) and read 920 times:

Gracias.


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User currently offlineJet-a gasguy From United States of America, joined Dec 2000, 266 posts, RR: 1
Reply 5, posted (12 years 12 months 4 days 1 hour ago) and read 915 times:

Notar520AC,

hey buddy, how ya doin? Been flyin the NOTAR lately?

 Smile
Jet-A gasguy




Find a job you love, and you'll never work a day in your life.
User currently offlineTimz From United States of America, joined Sep 1999, 6842 posts, RR: 7
Reply 6, posted (12 years 12 months 3 days 21 hours ago) and read 881 times:

In the past there have been slightly-different definitions of the nautical mile, but it's now supposed to be 1852 meters exactly, while the statute mile is 1609.344 meters exactly.

User currently offlineLAPA_SAAB340 From Spain, joined Aug 2001, 390 posts, RR: 4
Reply 7, posted (12 years 12 months 3 days 13 hours ago) and read 868 times:

Notar, if you want to roughly convert knots to mph and don't feel like using a calculator, you can do this:

Say your speed in knots is 160. Divide by ten (and get 16) and add it to your original to get 176mph. This gives you a rough estimate.
If you want a more exact answer, you do a little more math, just divide that 16 by 2, and add it as well.

So you have 160+16+8=184mph

The same applies if you want to convert mph to knots, except instead of adding to your mph speed, you subtract.



User currently offlineTAA_Airbus From Australia, joined Nov 1999, 726 posts, RR: 0
Reply 8, posted (12 years 12 months 3 days 12 hours ago) and read 862 times:

For those of you that dont know, which seems to be everyone otherwise it would of been said already, the nautical mile was derived from 1 minute of longitude on the equator.

Therefore 1' = 1nm

However, as far as conversions go, As I am unaware of the international standard for the radius of the earth at the equator, I cant work out what 1nm is in kms or St.miles


User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4575 posts, RR: 41
Reply 9, posted (12 years 12 months 3 days 12 hours ago) and read 860 times:

Um, I have always found these good:
Nautical->Statute (knot->mph): Divide by 8, multiply by 9
Statute->Nautical (mph->knot: Divide by 9, multiply by 8



"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineTimz From United States of America, joined Sep 1999, 6842 posts, RR: 7
Reply 10, posted (12 years 12 months 3 days 10 hours ago) and read 848 times:

The reason there have been various nautical miles in the past is the fact that the earth isn't spherical. WGS84 assumes the radius of the equator is 6378137 meters exactly, which makes a minute of longitude at the equator about 1855.325 meters. But a minute of latitude is 1842.905 meters at the equator and 1861.566 at the poles-- so presumably the now-official 1852-meter nautical mile is just a semi-arbitrary semi-average.

User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 11, posted (12 years 12 months 3 days 10 hours ago) and read 845 times:

One statue mile - 5,280 ft.

One nautical mile - 6,000 ft.


User currently offlineJohnnybgoode From Germany, joined Jan 2001, 2187 posts, RR: 6
Reply 12, posted (12 years 12 months 3 days 7 hours ago) and read 833 times:

pretty simple:

say you´ve got 200 knots, take 2 times and then minus 10%.
so that´s 200x2=400 400-40=360

200kts= ~360mph

rgds
daniel



If only pure sweetness was offered, why's this bitter taste left in my mouth.
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