But astrophysicist Geraint Lewis from the University of Sydney gave a talk last night explaining that, in theory at least, super-fast warp speed travel is possible according to Einstein’s theory of relativity.

Prediction of ship resistance using model tests For all model tests, we have to choose a scale, λ, for the model. Hull Speed: It is otherwise called as displacement speed is the speed at which the wavelength of the bow wave (wave formed at the bow of the ship or boat, when it travels in water) is equal to the length of the boat. Speed to Length Ratio = Velocity in Knots Waterline Length = V LWL The theoretical maximum SLR of 1.34 is the speed that a pair of wave crests can move through the … The more pronounced the blade rotation the higher the intended tip speed. Was 75 kph the speed of the car? 2006 “A simple method for predicting the maximum squat of a high-speed displacement ship”, Marine Technology, Vol. When a member ridicules another I am going to speak up, as just another member, which is what I am and all I am. Speed of Merchant ships is measured in Knots. A technology patented by an aerospace engineer describes a 'hybrid' craft that is capable of flying at breakneck speeds in the air, water, and even space using an … Also note that this formula is for deep water and that it tells you nothing about the amount of resistance it takes to get the boat to that speed-length ratio. As the speed of boat increases from rest state, the bow wave's wavelength increases, and usually its crest-to-trough dimension (height) increases as well. The size of the model will be restricted by the size of the tow tank facilities, available carriage speeds, and instrumentation. This is the answer the equation gives us, but how right is it? I try to be courteous, but I am direct. Let's say a mother ship is traveling at the speed of light. I am not "in charge" here, Admin5 is.

The maximum theoretical speed is ordinarily assumed to be 1.34 times the square root of the LWL. Gourlay, T.P. Ship speed formula I've seen several posts of people trying to figure out the effect of ship weight, engine power, cargo and fuel efficiency on fuel consumption and ship speed.

You might find it intersting that this same unit knots is used to define airplane speed too. Highly tuned propeller tips are moving at 6x the air speed. By T. H. Havelock, M.A., D.Sc, Fellow of St. John's College, Cambridge, Lecturer in Applied Mathematics, Armstrong College, JNewcastle- on-Tyne. From memory having the tip speed running at 1-3 times the the air flow speed is not efficient, but at least the propeller works over a wide range of air speeds. Generally, the bigger the model the better. The force on an object that resists its motion through a fluid is called drag.When the fluid is a gas like air, it is called aerodynamic drag or air resistance.When the fluid is a liquid like water it is called hydrodynamic drag, but never "water resistance".. Fluids are characterized by their ability to flow. The theoretical investigation of the total resistance to the forward motion of a ship is usually simplified by regarding it as the sum of certain independent terms such as the frictional, wave-makings and eddy-making resistances. I try to advise posters when they have posted in the wrong forum. The wavelength of a sound is the distance between adjacent identical parts of a wave—for example, between adjacent compressions as illustrated in Figure 2. 146-151 A Simple Method for Predicting the Maximum Squat of a High-Speed Displacement Ship Tim Gourlay, Associate Member SNAME Bob. The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: v w = fλ, where v w is the speed of sound, f is its frequency, and λ is its wavelength. 3, July 2006, pp. Full text of "The Wave-Making Resistance of Ships: A Theoretical and Practical Analysis" See other formats 276 The Wave-making Resistance of Ships : a Theoretical and Practical Analysis. The stretching function is plotted in figure 3. Discussion pressure drag. If you shoot a pod out of the mothership at the speed of light(and that pod is already traveling at the speed of light), then wouldn't that pod be traveling at twice the speed of light?

The experimental study of frictional resistance leads to a formula of the type. The ship is located at the center of the plot and you can see how the space around the ship is compressed (in front of the ship where the stretching function is negative) and stretched (behind, where it is positive). While the formula for fuel consumption in time is known and can be found in the wiki , I couldn't find the actual formula for ship speed. Re: Formula to calculate theoretical speed Hi, Capt. We just need to find the right materials to achieve it. SPEED TO LENGTH RATIO For a displacement boat, speed is a function of waterline length. To some folks that seems bossy. 1.8 km per hr make 1 knot. Unless you live in a world where cars have some kind of exceptional cruise control and traffic flows in some ideal manner, your speed during this hypothetical journey must certainly have varied.


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