what is concept of Mach 1, 2 or 3 in speed of aircraft.?
438410
Mach is the speed of sound. So Mach 3 is three times the speed of sound.
596792
Jet engines work on Newton's 3rd law. Throw sometihng back with a certain force and you will be propelled by that same force.\n\nNow, by continuity eqn, Av = A'v'\n\nIf you throw something out of a small area at a high velocity, the rate of flow in the opposite direction is then proportional.
760675
Making something go fast is not all that difficult much of the time, it is about making it *controllable*. Speed (power) is nothing without control.\n\nIn the air, not only do you have the option of full 360 degree movement options (esp with rotating wing aircraft), you do not have "blind corners", slippery road surfaces and sodding speed cameras.\n\nIn many ways we DO embrace much of the other technology though, from lighter materials, more aerodynamic design and advanced navigational facilties (FRED / GPS) etc\n\nOne thing that has never seemed to make it to the road is an engine with twin spark plugs - a requirement on all conventional engined aircraft. Not only does it give backup (less critical on the road) but ALSO makes a fair difference in economy. When switching magnetos (ignition) from BOTH to Left or Right, a drop of 50-100 RPM is not uncommon - suggesting strongly that the additional spark does indeed improve effieicney and power output.\n\nAeroplane engines are also happy to be leaned out considerably more than automobile engines. Again allowing for greater economy AND power.\n\nAre there any other technologies you are thinking of specifically that you think should be incorporated into cars?
539111
There is a problem with the previous answer... the earth's escape velocity is around 25,000MPH... that number is based on an object without any propulsion, mankind has yet to develop a rocket or other propulsion system that can reach that speed... just wanted to clarify that ;)  we can't hit mach 30 (mach I is 720mph, 22,500mph is about mach 30) yet, but we can leave the earth's gravity field because of continuous propulsion (lots of rocket fuel)
32072
Values of the Speed of Sound:\n\nOne of the most common questions we receive is fow fast is the speed of sound, and as was pointed out earlier, there is no single value to quote. The speed of sound, also known as Mach 1, changes throughout the atmosphere based on the temperature at any given altitude. Probably the most important value to remember, however, is the speed of sound at sea level. Based on the standard atmospheric model, this value has been defined to be\n\n    * 1,116.4 ft/s\n    * 340.3 m/s\n    * 761.2 mph\n    * 1,225.1 km/h\n    * 661.5 knots\n\nIf you were to reach Mach 1, or "break the sound barrier," at sea level, the above speed is how fast you would have to travel in order to do so.
918965
Sounds like "speed" - check out the link below for more info. I hope this helps.
156648
In thermodynamics and fluid mechanics, compressibility is a measure of the relative volume change of fluid or solid as a response to a pressure (or mean stress) change.\n\nCompressibility is an important notion in aerodynamics. At low speeds, the compressibility of air is not important for aircraft design, but as the airflow nears and exceeds the speed of sound, a host of new aerodynamic effects become important in the design of aircraft. These effects, often several of them at a time, made it very difficult for World War II era aircraft to reach speeds much beyond 500mph.\n\nThe term "compressibility" is also used in thermodynamics to describe the deviance in the thermodynamic properties of a real gas from those expected from an ideal gas.
597670
doesn't really exist.  Commonly referred to as MACH.  As you approach Mach the air has trouble getting out of the way fast enough.  This creates a pressure build up.  (why modern jets have swept wings) Once exceeded the jet creates a sonic boom.  \n\nThe sound is still created, but it can't keep up with the source. Try to find a jet by sound alone.  Then find it visually.  It's kinda hard.  Even if directly overhead.
891219
The technology achieved in the race of air power is tremendous. How do you think that man has achieved to put over one million people in the skies at an altitude ranging from 29,000 to 44,000 feet continuously every hour on the hour? Is it not through having over 5000 airplanes continuously flying in the air as a result of understanding aerodynamics and behavior of air and the power that air may produce because of our understanding of its behavior extensively? The development of high bypass engines that produce 100,000 pounds of forward thrust through titanium blades shaped as airfoil to deliver considerable engine thrust for aircraft and lift for wings to carry over one million pounds of weight to safely cruise in the air with as little noise as possible by the latest Boeing 747 Jumbo jet which can easily and safely maneuver at an altitude reaching almost 10 miles above in the skies. Don't you think that this is quite an advanced technology reached from understanding fluids engineering. How about the achievement of the United States fighters that travels almost 5 times the speed of sound and cruise at a level over 90,000 feet. Isn't that quite an achievement developed by researches done to understand behavior of aerodynamics? Currently, General Electric is indulging in producing noiseless high by pass engines that delivers forward thrust exceeding 120,000 pounds. Can you imagine flying at 50,000 feet in the air with speed greater than the speed of sound and enjoying an environment quieter than your bedroom or inside your own home? What about Generating electricity by building windmills at remote areas unpopulated on Earth. How about compressing the air using electrical pumps with air flow to produce conditioned air suited for hot climates at home or office or inside your car or factory or almost any place. Isn't that an advancement made in the race of air power. I can go on and reveal to you how much advancement man has reached to subjugate the tremendous amount of air that we have in our planet to suit our peace and joy of life. Finally, consider the power of Hurricane that can lift up a whole city from the ground and result more damage to the areas on Earth that exceeds the damage that water had done during the Great flood of Noah.
257523
Lift, thrust, gravity, drag.
65812
It is currently 763 mph (or mach 1.02)
788979
For the add on: If a toy plane weighs two pounds, how fast should it accelerate? What unit of measurement would you use?\n\nNot sure what you're asking. Unless you're talking about how fast it would accelerate if you drop it. Then it would be vertically down at 32 ft/s^2 in a vacuum. No matter how much it weighs. (I'm using the English system units since you talked about pounds.)\n\nIf you're asking for an opinion of what would be a nice number for acceleration ... Well, if you wanted it to get up to a speed of 50 ft/s within 20 seconds:\nV = a*t or acceleration = V/t = (50 ft/s)/20 s = 2.5 ft/s^2\n\nI hope this helps
991881
Beginners guide to Aerodynamics:\nhttp://www.grc.nasa.gov/WWW/K-12/airplane/bga.html\n\nAerodynamics on Wikipedia:\nhttp://en.wikipedia.org/wiki/Aerodynamics\n\nAerodynamics in car racing:\nhttp://www.nas.nasa.gov/About/Education/Racecar/\n\nDownforce on Wikipedia:\nhttp://en.wikipedia.org/wiki/Downforce\n\nplenty more if you just stick the search terms "aerodynamics", "downforce", or "car aerodynamics" into any old internet search engine.
399954
SPEED=dy/dt=distance/time.its not exactly something you invent.it was an axiom,a basis of understanding.
499929
The first 4 is the maximum mean line camber in % of chord.\nThe second 4 is the position of the max camber in tenths of c.\nThe 12 is the maximum thickness of the airfoil in % c.\n\nThe airfoil you mention was derived by the folks at NACA in the late 1920s and was used on such planes as the Luscombe and  Aeronca.  Definitely a vintage model........
327928
That is rather complex.  By most aerodynamic I assume you mean the least drag due to friction with the air.\n\nI think the order of aerodynamicness, if that is a word, goes as follows.\n\nsingularity\n2D line travelling in the direction of the line.\n3D planer object traveling in the plane\nthen you start to get friction\nbullet/missile etc is optimized for straight travel with minimum drag\nWedge shaped aircraft are required so they have the ability to turn and stabilize, but lose some of the aerodynamic character\nThen you get into commercial planes....\nElephants are at the bottom of the list I believe.\n\nYou could also put frisbees and shuriken up in there somewhere, but that is the general idea.  Hope this helps.
302444
sound-330m/s in air medium\nlight-299,297km/s