What is one knot equal to in kilometers? Knot
One knot equal to one thousand eight hundred fifty-two meters or one kilometer eight hundred fifty-two meters
By international definition, one knot is equal to 1.852 km/h (exact) or 0.5144444 m/s. This unit of measurement, although non-systemic, is allowed for use along with SI units.
A knot is a linear speed of 1 nautical mile per hour.
one sea knot is equal to 1852 meters => 1 km 852 m
The origin of the name is related to the principle of using sector lag. The speed of the vessel was determined as the number of knots on the line (thin cable) that passed through the hand of the measurer in a certain time (usually 15 seconds).
Knots do not measure distance but speed, number of knots = number of nautical miles per hour, nautical mile = 1.8 km.
Knot and international nautical mile are widely used in maritime and air transport. Knots were considered the most common measurement in England until 1965, but after the re-decision they became known as miles.
Initially, this value corresponded to the length of 1/60 degree of the arc of a circle on the surface of the Earth with the center coinciding with the center of the planet. In other words, if we consider any meridian, then a nautical mile will be approximately equal to the length of one minute of latitude. Since the shape of the Earth is somewhat different from the outline of a perfect sphere, the length of 1 minute of degree of the meridian in question may differ slightly depending on latitude. This distance is greatest at the poles - 1861.6 m, and least at the equator - 1842.9 m. To avoid confusion, it was proposed to unify the length of the nautical mile. The length taken as a basis was 1 minute of degree at 45º latitude (1852.2 m). This definition led to the fact that the nautical mile became convenient for calculating navigation problems. For example, if you need to measure a distance of 20 miles on a map, then it will be enough to measure 20 arc minutes with a compass on any meridian marked on the map.
1 sea knot is equal to:
- kilometer per second (km/s) 0.0005144
- meter per second (m/s) 0.5144
- kilometer per hour (km/h) 1.852
- meter per minute 30.87
You can find out the speed from 0 to 100 nautical knots converted into km/h and m/sec in this table:
| Speed in knots | Speed in km/h | Speed in m/sec |
| 1 | 1.852 km/h | 0.514 m/s |
| 2 | 3.704 km/h | 1.028 m/s |
| 3 | 5.556 km/h | 1.542 m/s |
| 4 | 7.408 km/h | 2.056 m/s |
| 5 | 9.26 km/h | 2.57 m/sec |
| 6 | 11.112 km/h | 3.084 m/s |
| 7 | 12.964 km/h | 3.598 m/s |
| 8 | 14.816 km/h | 4.112 m/s |
| 9 | 16.668 km/h | 4.626 m/s |
| 10 | 18.52 km/h | 5.14 m/sec |
| 11 | 20.372 km/h | 5.654 m/s |
| 12 | 22.224 km/h | 6.168 m/s |
| 13 | 24.076 km/h | 6.682 m/s |
| 14 | 25.928 km/h | 7.196 m/s |
| 15 | 27.78 km/h | 7.71 m/sec |
| 16 | 29.632 km/h | 8.224 m/s |
| 17 | 31.484 km/h | 8.738 m/s |
| 18 | 33.336 km/h | 9.252 m/s |
| 19 | 35.188 km/h | 9.766 m/s |
| 20 | 37.04 km/h | 10.28 m/sec |
| 21 | 38.892 km/h | 10.794 m/s |
| 22 | 40.744 km/h | 11.308 m/s |
| 23 | 42.596 km/h | 11.822 m/s |
| 24 | 44.448 km/h | 12.336 m/s |
| 25 | 46.3 km/h | 12.85 m/sec |
| 26 | 48.152 km/h | 13.364 m/s |
| 27 | 50.004 km/h | 13.878 m/s |
| 28 | 51.856 km/h | 14.392 m/s |
| 29 | 53.708 km/h | 14.906 m/s |
| 30 | 55.56 km/h | 15.42 m/sec |
| 31 | 57.412 km/h | 15.934 m/s |
| 32 | 59.264 km/h | 16.448 m/s |
| 33 | 61.116 km/h | 16.962 m/s |
| 34 | 62.968 km/h | 17.476 m/s |
| 35 | 64.82 km/h | 17.99 m/sec |
| 36 | 66.672 km/h | 18.504 m/s |
| 37 | 68.524 km/h | 19.018 m/s |
| 38 | 70.376 km/h | 19.532 m/s |
| 39 | 72.228 km/h | 20.046 m/s |
| 40 | 74.08 km/h | 20.56 m/sec |
| 41 | 75.932 km/h | 21.074 m/s |
| 42 | 77.784 km/h | 21.588 m/s |
| 43 | 79.636 km/h | 22.102 m/s |
| 44 | 81.488 km/h | 22.616 m/s |
| 45 | 83.34 km/h | 23.13 m/sec |
| 46 | 85.192 km/h | 23.644 m/s |
| 47 | 87.044 km/h | 24.158 m/s |
| 48 | 88.896 km/h | 24.672 m/s |
| 49 | 90.748 km/h | 25.186 m/s |
| 50 | 92.6 km/h | 25.7 m/sec |
| 51 | 94.452 km/h | 26.214 m/s |
| 52 | 96.304 km/h | 26.728 m/s |
| 53 | 98.156 km/h | 27.242 m/s |
| 54 | 100.008 km/h | 27.756 m/s |
| 55 | 101.86 km/h | 28.27 m/sec |
| 56 | 103.712 km/h | 28.784 m/s |
| 57 | 105.564 km/h | 29.298 m/s |
| 58 | 107.416 km/h | 29.812 m/s |
| 59 | 109.268 km/h | 30.326 m/s |
| 60 | 111.12 km/h | 30.84 m/sec |
| 61 | 112.972 km/h | 31.354 m/s |
| 62 | 114.824 km/h | 31.868 m/s |
| 63 | 116.676 km/h | 32.382 m/s |
| 64 | 118.528 km/h | 32.896 m/s |
| 65 | 120.38 km/h | 33.41 m/sec |
| 66 | 122.232 km/h | 33.924 m/s |
| 67 | 124.084 km/h | 34.438 m/s |
| 68 | 125.936 km/h | 34.952 m/s |
| 69 | 127.788 km/h | 35.466 m/s |
| 70 | 129.64 km/h | 35.98 m/sec |
| 71 | 131.492 km/h | 36.494 m/s |
| 72 | 133.344 km/h | 37.008 m/s |
| 73 | 135.196 km/h | 37.522 m/s |
| 74 | 137.048 km/h | 38.036 m/s |
| 75 | 138.9 km/h | 38.55 m/sec |
| 76 | 140.752 km/h | 39.064 m/s |
| 77 | 142.604 km/h | 39.578 m/s |
| 78 | 144.456 km/h | 40.092 m/s |
| 79 | 146.308 km/h | 40.606 m/s |
| 80 | 148.16 km/h | 41.12 m/sec |
| 81 | 150.012 km/h | 41.634 m/s |
| 82 | 151.864 km/h | 42.148 m/s |
| 83 | 153.716 km/h | 42.662 m/s |
| 84 | 155.568 km/h | 43.176 m/s |
| 85 | 157.42 km/h | 43.69 m/sec |
| 86 | 159.272 km/h | 44.204 m/s |
| 87 | 161.124 km/h | 44.718 m/s |
| 88 | 162.976 km/h | 45.232 m/s |
| 89 | 164.828 km/h | 45.746 m/s |
| 90 | 166.68 km/h | 46.26 m/sec |
| 91 | 168.532 km/h | 46.774 m/s |
| 92 | 170.384 km/h | 47.288 m/s |
| 93 | 172.236 km/h | 47.802 m/s |
| 94 | 174.088 km/h | 48.316 m/s |
| 95 | 175.94 km/h | 48.83 m/sec |
| 96 | 177.792 km/h | 49.344 m/s |
| 97 | 179.644 km/h | 49.858 m/s |
| 98 | 181.496 km/h | 50.372 m/s |
| 99 | 183.348 km/h | 50.886 m/s |
| 100 | 185.2 km/h | 51.4 m/sec |
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You probably want to know specific numbers as soon as possible? Well, let's not bore you with long conversations.
Boeing 737 takeoff speed
Let's figure out how fast a plane takes off. It all depends on individual technical characteristics.
If we talk about the Boeing 737, then takeoff is divided into several stages:
- The plane begins to move only at the moment when the engine operates at a speed of 810 revolutions per minute. Once this point is reached, the pilot slowly releases the brakes and keeps the control lever at neutral.
- Speed is gained when the aircraft moves on three wheels.
- Liner accelerates to 185 kilometers per hour and moves on two wheels.
- When the acceleration reaches 225 kilometers per hour, the ship takes off.
The above indicators may fluctuate slightly as speed is affected by wind direction and strength, air currents, humidity, serviceability and quality runway etc.
You can find out the take-off speed of other airliners from the table:
We invite you to watch this video with a visual measurement of speed during takeoff passenger plane by GPS:
Airplane speed when landing
As for the speed of the aircraft during landing, this is a variable value that depends on the mass of the side and the strength of the headwind, but in the average landing speed is 240-250 km/h, that is, approximately 20 km/h below the take-off speed of the aircraft.
If there is a headwind, the speed may be even lower, because the headwind increases the lift, in which case values from 130-200 km/h are quite acceptable.
Speed of a passenger aircraft in flight
So, the average speed of modern airliners is 210-800 kilometers per hour. But this is not the maximum value.
Cruise and maximum values
The acceleration of passenger airliners is divided into cruising and maximum. This value is never compared with sound barrier. Passengers are not transported at maximum speed.
Speed characteristics vary depending on the airliner model. Average values:
- Tu 134 - 880 kilometers per hour;
- IL 86 - 950 kilometers per hour;
- Passenger Boeing - accelerating from 915 to 950 kilometers per hour.
By the way, the maximum value for civil air transport is approximately 1035 kilometers per hour.
Passenger airliners have low cruising and maximum speeds, so you don’t have to worry again before your upcoming flight!
Passenger aircraft flight speed - quick reference:
- Airbus A380: maximum speed - 1020 km/h, cruising speed - 900 km/h;
- Boeing 747: maximum – 988 km/h, standard flight speed – 910 km/h;
- IL 96: maximum – 900 km/h, cruising speed – 870 km/h;
- Tu 154M: maximum speed – 950 km/h, average – 900 km/h;
- Yak 40: maximum – 545 km/h, and normal speed is 510 km/h.
You may find it easier to understand the numbers thanks to the table:
No related posts.
true airspeed (TAS)
The actual speed at which the aircraft moves relative to the surrounding air due to the thrust of the engine(s). The velocity vector in the general case does not coincide with the longitudinal axis of the aircraft. Its deflection is affected by the angle of attack and the aircraft's slip;
instrument speed (IAS)
The speed indicated by the instrument that measures airspeed. At any height, this value unambiguously characterizes the load-bearing properties of the glider in this moment. Meaning indicated speed used when piloting an aircraft;
Ground speed()
V1 depends on many factors, such as: weather conditions (wind, temperature), runway surface condition, take-off weight of the aircraft and others. If the failure occurs at a speed greater than V1, the only solution will continue to take off and then land. Most types of civil aviation aircraft are designed in such a way that, even if one of the engines fails on takeoff, the remaining engines are sufficient to accelerate the aircraft to a safe speed and rise to the minimum altitude from which it is possible to enter the glide path and land the aircraft.
Va
Estimated maneuvering speed. Maximum speed, at which it is possible to completely deflect the control surfaces without overloading the aircraft structure.
Vr
The speed at which the front landing gear begins to rise.
V2
Safe speed for takeoff.
Vref
Design landing speed.
Vtt
Specified speed of crossing the runway leading edge.
Vfe
Maximum permissible speed with flaps extended.
Vle
Maximum permissible speed with landing gear extended.
Vlo
Maximum landing gear extension/retraction speed.
Vmo
V maximum operating - maximum operating speed.
Vne
Unexceedable speed. The speed indicated by a red line on the airspeed indicator.
Vy
Optimal climb speed. The speed at which the aircraft will reach its maximum altitude in the shortest time.
Vx
Optimal climb angle speed. The speed at which the aircraft will gain maximum altitude with minimum horizontal movement.
Vertical speed
Change in flight altitude per unit time. Equal to the vertical component of speed
Knot (unit of measurement)
Aircraft speed indicator, graduated in knots.
The prevalence of the knot as a unit of measurement is associated with the significant convenience of its use in navigation calculations: a ship moving at a speed of 1 knot along the meridian passes one arc minute of geographic latitude in one hour.
The origin of the name is related to the principle of using a sector log. The speed of the vessel was determined as the number of knots on the line (thin cable) that passed through the hand of the measurer in certain time(usually 15 seconds or 1 minute). In this case, the distance between adjacent nodes on the line and the measurement time were selected in such a way that this amount was numerically equal to the speed of the vessel, expressed in nautical miles per hour.
A knot is an independent unit of speed. To say: “The ship is sailing at a speed of 36 knots per hour” is incorrect. The absurdity of such an expression is very well described in the story “The Flying Dutchman”, an excerpt from which is given below.
“Tell me, captain, what is our speed? - raising his glasses from notebook, the guest asked again.
Guzhevoy already opened his mouth to answer with his usual wit, that there were six knots per hour - in the first, and in the second they didn’t pull even three, but Piychik warned him:
“As much as it should be: full speed, twelve knots.”
The lag cable, released while moving from the stern, broke into knots at a distance of 1/120 of a mile (50 feet). By counting the number of knots that travel in half a minute (1/120 of an hour), you can find out the speed in nautical miles per hour. It follows that the expression “30 knots per hour” is clearly meaningless: it turns out that the ship, instead of a decent speed of 56 km/h, drags 1500 feet (470 m) per hour, which is both incorrect and offensive.
The hub and international nautical mile are widely used in maritime and air transport. Knots were considered the most common measurement in England until 1965, but later they became known as miles.
Notes
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See what “Knot (unit of measurement)” is in other dictionaries:
KNOT- KNOT, 1). In anatomy, thickening or enlargement of an organ or tissue, such as a lymph node or sinoatrial node, of nervous tissue that controls the rhythm of the heart. 2). In botany, a node is a place on a plant stem from which a leaf or leaves arise. 3) ... Scientific and technical encyclopedic dictionary
Node (disambiguation)- Knot: A knot connecting and intertwining linear materials. “Gordian knot” is a catchphrase. Contents 1 Communications 2 Science and technology ... Wikipedia
KNOT- (Knot) 1. Any grip or noose made on the tackle or around anything; connecting the ends of the cables together. W. woman's knot (Grannies knot, carrick bend) incorrectly tied straight or reef W. bowel (Bowline hitch) reliable,... ...Nautical Dictionary
Node (in navigation)
Knot (speed)- Knot is a unit of speed equal to one nautical mile per hour. Since there are different definitions of a nautical mile, a knot can have different meanings. By international definition, one knot is equal to 1.852 km/h (exactly) or... ... Wikipedia
Knot (measure)- Knot is a unit of speed equal to one nautical mile per hour. Since there are different definitions of a nautical mile, a knot can have different meanings. By international definition, one knot is equal to 1.852 km/h (exactly) or... ... Wikipedia
node- noun, m., used. compare often Morphology: (no) what? node, what? knot, (I see) what? node, what? knot, about what? about the node; pl. What? nodes, (no) what? nodes, what? nodes, (I see) what? nodes, what? knots, about what? about knots 1. A knot is called a tightened... ... Dictionary Dmitrieva
List of nodes- List of nodes is a list of nodes in alphabetical order. Contents 1 A 2 B 3 C 4 D 5 E ... Wikipedia
Nautical mile- The nautical mile is a unit of distance used in navigation and aviation. The nautical mile was originally defined as the length of a great circle on the surface of the globe measuring one minute of arc. Thus, moving to... Wikipedia
kinematic units- ▲ unit of measurement is speed knot. gal is a unit of acceleration. hertz unit of frequency... Ideographic Dictionary of the Russian Language
Sometimes the notation is also used kt) - unit of speed. Equal to the speed of uniform motion at which a body travels a distance of one nautical mile in one hour. It is used in maritime and aviation practice, in meteorology, and is the basic unit of speed in navigation.
According to international definition, one knot is equal to 1852 m/h exactly or 0.51444... m/s. This unit of measurement, although non-systemic, is allowed for use along with units of the International System of Units (SI). In the Russian Federation, the unit is approved for use as an off-system unit without a time limit with the scope of application “marine navigation”. The unit is included in the All-Russian Classifier of Units of Measurement.
The prevalence of the knot as a unit of measurement is associated with the significant convenience of its use in navigation calculations: a ship moving at a speed of 1 knot along the meridian passes one arc minute of geographic latitude in one hour.
The origin of the name is related to the principle of using a manual sector log, which in its simplest form was a plank tied to a long thin cable (lagline) in such a way that when thrown overboard of a moving vessel, it would be braked by the water. Knots were tied on the laglin at equal distances from each other; the distance was selected such that the number of knots on the lagline being etched overboard, escaping from the lag view and passing through the measuring hand in a certain time, was numerically equal to the speed of the vessel, expressed in nautical miles per hour.
A knot is an independent unit of speed. To say: “The ship is moving at a speed of 36 knots per hour” is incorrect. The fallacy of such an expression is illustrated in the story “The Flying Dutchman” by L. S. Sobolev, an excerpt from which is given below:
Tell me, captain, what is our speed? - Raising his glasses from his notebook, the guest asked again.
Guzhevoy already opened his mouth to answer with his usual wit, that there were six knots per hour - in the first, and in the second they didn’t pull even three, but Piychik warned him:
Allowed: full speed, twelve knots.
- Leonid Sergeevich Sobolev. Stories of Captain 2nd Rank V. L. Kirdyaga, heard from him during the “Great Seat”
Knot and nautical mile are widely used in maritime and air transport. The knot is the only widely used unit of speed that has its own name. Decimal prefixes (kilo-, milli-, etc.), which are used to form multiples and submultiples, are not used with the “knot” unit.
Knots and miles per hour should not be confused. A knot is one nautical (or nautical) mile (1852 meters) per hour, and "mile per hour" (English mph, miles per hour), widely used in Great Britain and North America, is a statute mile (1609 meters) in hour.
Before the introduction of the international knot, similar knot definitions were also used, based on different definitions of the nautical mile. In the USA, until 1952, a knot based on the American nautical mile (1852.249 m) was used. In Great Britain until 1970 (as well as in the countries of the British Commonwealth), a unit based on the British or Admiralty nautical mile (1852.184 m) was used. The difference between both definitions is modern definition node is about 0.01% and is insignificant in almost all practical cases.
There is a simple mnemonic for quickly mentally converting knots to kilometers per hour: “multiply by two and subtract 10 percent.” For example, speed 15 knots, 15×2 = 30 km/h, subtract 10% = 3 km/h, we get 27 km/h. The rule gives values with an error of less than 3%. To recalculate km/h → nodes, the reverse algorithm is used: the speed in km/h is divided by 2 and 10% is added to the resulting value. For example, 20 km/h → 10 knots → 11 knots(the exact value is 10.799136... nodes).
Notes
- Regulations on units of quantities allowed for use in the Russian Federation. Approved by Decree of the Government of the Russian Federation No. 879 of October 31, 2009.
- The international designation “kn” (from the English knot “knot”) is established ISO standard 80000-3.
- Not recommended as it is the same as the international designation for kiloton.
- Dengub V. M., Smirnov V. G. Units of quantities. Dictionary-reference book. - M.: Standards Publishing House, 1990. - P. 117. - 240 p. - ISBN 5-7050-0118-5.
