Gnasher Posted April 17, 2007 Report Posted April 17, 2007 how do i convert knots to mph? If my boat does 22.5 knots, whats the formula to work out how many mph i am travelling at? Dan Quote
Paul J Posted April 17, 2007 Report Posted April 17, 2007 I think 23 knots is 20mph, don't kmow the calc though PJ Quote
alun j. Posted April 17, 2007 Report Posted April 17, 2007 NO........other way round!! More mph than knots.........as a nautical mile is longer. Alun. Quote
Paul D Posted April 17, 2007 Report Posted April 17, 2007 1 mile = 5280 Feet 1 Nautical Mile = 6082 Feet. Therefore 1 Nautical Mile per Hour = 6,082 Feet per Hour = 6082/5280 Mph = 1.15 Mph So 22.5 Knots = 22.5 x 1.15 Mph = 25.88 Mph Nautical Mile definition Quote
Maverick Martin Posted April 17, 2007 Report Posted April 17, 2007 KNOTS x 1.15 = MPH I think Martin Quote
Maverick Martin Posted April 17, 2007 Report Posted April 17, 2007 Damn you beet me to it Paul Martin Quote
Gnasher Posted April 17, 2007 Author Report Posted April 17, 2007 easy peasy when you know how!! Me not travelling as fast as i thought then!!! It feels so much faster on water than it does on land ! Quote
oysterboats Posted April 17, 2007 Report Posted April 17, 2007 i was always led to belive that a knot was 1.5 times faster than mph Quote
oysterboats Posted April 17, 2007 Report Posted April 17, 2007 well ive just blown that theory completely out of the water i got it the wrong way round anyway and went on ask jeeves and can confirm that it is 1.15x 40 knots =46 mph.lol Quote
hotshot Posted April 17, 2007 Report Posted April 17, 2007 (edited) This link will take you to a piece of free software that I can really recommend - it's a convertor for just about any unit - length, speed, weight, whatever: http://joshmadison.com/software/convert/ The usual disclaimer - I've no connection, other than being a happy user of this software. It's a very small download, and I've used it with various operating systems (now on XP) without any problems. I hope you find it as useful as I do.... (and yes - if you select the "Speed" tab and "knot" for the "Input" field, then select "mile/hour" for the Output field, then typing 1 (knot) in the input gives 1.15 as the output in mph and 22.5 knots comes out as just under 26 mph to answer Dan's original question, while 40 knots = 46 mph and so on) Enjoy! Dave Edited April 18, 2007 by hotshot Quote
AHoy Posted April 18, 2007 Report Posted April 18, 2007 Most (many?) GPS and plotter units have the ability to display speed in mph. knots or Kph saving the underway calculations - if you have one with you. As an easy rule of thumb a knot is 1 and 1/8 mph (not as accurate as 1.15 mph but easier to do on the move). Quote
Afishionado Posted April 18, 2007 Report Posted April 18, 2007 There is a vital factor which all of you have overlooked ! One needs to factor in C x 2t x (-4t) + us/jp Whereas.......... The speed of light times the combustion method of the engine x (the reduction of the carbon footprint Vs a 4 cycle engine) + the country of origin of the engine (Well known fact that in the USA men need to think their willies are bigger than Japanese mens). This means that if you are running a 2 stroke e-tech you APPEAR TO BE GOING FASTER THAN OTHER SIMILAR BOATS POWERED BY BETTER ENGINES!!!!!! Mad Mike Quote
jack Posted April 18, 2007 Report Posted April 18, 2007 Naughty..Naughty.! Mike,you are at it again,!!! jack Quote
Paul D Posted April 18, 2007 Report Posted April 18, 2007 Naughty..Naughty.! Mike,you are at it again,!!! jack What's he at exactly ? What the f%*ck has an E-Tec got to do with a conversion from knots to Mph ? Quote
Brian Posted April 18, 2007 Report Posted April 18, 2007 This link will take you to a piece of free software that I can really recommend - it's a convertor for just about any unit - length, speed, weight, whatever: http://joshmadison.com/software/convert/ Dave That's a brilliant bit of software, every thing in one place. Quote
Afishionado Posted April 18, 2007 Report Posted April 18, 2007 Naughty..Naughty.! Mike,you are at it again,!!! jack What's he at exactly ? What the f%*ck has an E-Tec got to do with a conversion from knots to Mph ? Just a little gentle leg pulling re your planing speed and your passionate arguments in favour of Evinrude 2 strokes Paul. Mad Mike Quote
jack Posted April 18, 2007 Report Posted April 18, 2007 To Paul D. [ .Re;"What is he at".,] I think it is known in polite circles as "soliciting constructive controversy" jack Quote
Shropfisher Posted April 18, 2007 Report Posted April 18, 2007 Well I'm chuffed, I downloaded a chart showing Knotes x MPH x Force, and it was the wrong way round, so it means I'm going faster !! Quote
djredrupp Posted April 18, 2007 Report Posted April 18, 2007 One needs to factor in C x 2t x (-4t) + us/jp im afraid you have got that formula wrong... everyone knows that its 1.5C x 2t x (-4t) + the 10th root of us/jp x 6th multiple of the displacement! Elementary my dear watson lool Dan Quote
Afishionado Posted April 18, 2007 Report Posted April 18, 2007 One needs to factor in C x 2t x (-4t) + us/jp im afraid you have got that formula wrong... everyone knows that its 1.5C x 2t x (-4t) + the 10th root of us/jp x 6th multiple of the displacement! Elementary my dear watson lool Dan DAMNIT!! The boy is right!!! I am undone!!! Mad Mike Quote
djredrupp Posted April 18, 2007 Report Posted April 18, 2007 Sorry! im sure we could collaborate some mad theories though! lol Dan Quote
AlderneyBassman Posted April 19, 2007 Report Posted April 19, 2007 There is a vital factor which all of you have overlooked ! One needs to factor in C x 2t x (-4t) + us/jp Whereas.......... The speed of light times the combustion method of the engine x (the reduction of the carbon footprint Vs a 4 cycle engine) + the country of origin of the engine (Well known fact that in the USA men need to think their willies are bigger than Japanese mens). This means that if you are running a 2 stroke e-tech you APPEAR TO BE GOING FASTER THAN OTHER SIMILAR BOATS POWERED BY BETTER ENGINES!!!!!! Mad Mike Nice one Mike! Hang on a minute what am I saying, me an Etec owner too Quote
toerag Posted April 19, 2007 Report Posted April 19, 2007 It feels so much faster on water than it does on land ! It feels even faster when your mate's driving and you're in the back trying to clean fish or the boat!! I crawl round my deck to stop myself falling out! Quote
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