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Topic: Airspeed

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Airspeed indicator

Equivalent airspeed

Calibrated airspeed

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	Airspeed - Wikipedia, the free encyclopedia
		Airspeed refers to the speed of an aircraft in relation to the air; it is nearly always different from ground speed, the speed of the aircraft in relation to the ground.
		Indicated airspeed (IAS) is the speed as measured by the aircraft's sensors, and displayed on the airspeed indicator.
		Indicated airspeed is derived by subtracting the static air pressure (usually detected at the static ports on one or both sides of the aircraft) from the dynamic air pressure, usually detected by the pitot tube which is mounted facing forward.
	en.wikipedia.org /wiki/Airspeed (447 words)

	Airspeed indicator - Wikipedia, the free encyclopedia
		The airspeed indicator is an instrument used in an aircraft to display the craft's airspeed, typically in knots, to the pilot.
		During approach and landing, the aircraft is typically operated at airspeeds specified by air traffic control or the aircraft's operating handbook depending on conditions and the phase of the approach.
		During instrument flight, the airspeed indicator is the primary instrument of reference for pitch control during climbs and descents, and a secondary instrument of reference for pitch control during cruise and turns.
	en.wikipedia.org /wiki/Airspeed_indicator (919 words)

	Relative Velocity - Ground Reference
		Airspeed cannot be directly measured from a ground position, but must be computed from the ground speed and the wind speed.
		Airspeed is the vector difference between the ground speed and the wind speed.
		The airspeed is then the negative of the wind speed that is generated in the tunnel.
	www.grc.nasa.gov /WWW/K-12/airplane/move.html (1007 words)

	Airspeed Ambassador - Wikipedia, the free encyclopedia
		The Airspeed Ambassador was a twin piston engined airliner that first flew on July 10, 1947 and served in very small numbers through the 1950s.
		It had its origin in 1943 as a requirement identified by the Brabazon Committee for a twin-engined, short to medium-haul DC-3 replacement.
		Airspeed Ltd was asked to prepare an unpressurized design in the 14.5 tonne gross weight class using two Bristol Hercules radials.
	www.wikipedia.org /wiki/Airspeed_Ambassador (346 words)

	Flight Training Articles
		Equivalent airspeed is calibrated airspeed corrected for the compression of the air at a particular altitude.
		True airspeed is the calibrated airspeed or EAS as appropriate corrected for pressure altitude and temperature.
		It is the airspeed of an aircraft relative to undisturbed air and is used primarily in flight planning.
	www.gg-pilot.com /ggweeklyarticle.asp?id=5 (372 words)

	Types of Airspeed
		Indicated airspeed drops as you climb, because as the density of the air decreases with altitude, fewer air molecules hit the pitot tube.
		The difference between indicated airspeed and calibrated airspeed is usually greatest at low airspeeds, when the air flow around the static ports is turbulent.
		Aircraft that operate at high altitudes use Mach number, not airspeed, as a reference for aircraft performance and navigation, because the airspeed indicator is subject to many errors at high speeds in the thin air of the upper atmosphere.
	www.abbysenior.com /aviation/typesof.htm (445 words)

	Arizona Airspeed Home Page
		What Airspeed started in 1994 has now become an ever evolving skydiving project, changing members from year to year but continuing the foundation of training and competing techniques developed by the original team.
		Airspeed is not only a competition team but it also works hard to share what is learned over thousands of jumps with the rest of the skydiving community.
		Arizona Airspeed is again training full time for both the 4 and 8-way events at the U.S. Nationals in Perris, CA this September.
	www.airspeed.org /main_index.htm (498 words)

	About NAVAIR AIRSpeed (Site not responding. Last check: 2007-11-05)
		NAVAIR AIRSpeed is a cultural change affecting administrative, non-production, technical functions of research and development, test and evaluation, acquisition and corporate operations processes within NAVAIR.
		NAVAIR AIRSpeed is one of three AIRSpeed initiatives being employed by the Navy to address a serious challenge facing the Naval Aviation Enterprise (NAE).
		This was followed by Enterprise AIRSpeed which focuses on logistics excellence by reducing the cost of doing business within the NAE and improving production processes and material management in organizational, intermediate, and depot maintenance in order to support ready for tasking aircraft in a cost-wise readiness manner.
	www.navair.navy.mil /navairairspeed/NAVAIRAirspeed_definitions.cfm (1000 words)

	EA 205 PRINCIPLES OF AERONAUTICS AND ASTRONAUTICS Airspeed Laboratory (Site not responding. Last check: 2007-11-05)
		To determine the response of an airspeed indicator to various flow velocities and to compare the results to the theoretical values obtained from the momentum theory.
		Record the indicated airspeed and the height reading on the U-tube manometer as the flow velocity is reduced in increments of 2” of H
		The equation for indicated airspeed as a function of dynamic pressure that is fitted to the experimental data is of the form:
	web.usna.navy.mil /~aeroweb/courses/ea205/AirspeedLab.html (341 words)

	Airspeed - Velocity templates for Python - Trac (Site not responding. Last check: 2007-11-05)
		Airspeed is a powerful and easy-to-use templating engine for Python that aims for a high level of compatibility with the popular Velocity library for Java.
		The output of templates in Airspeed is not yet 'whitespace compatible' with Velocity's rendering of the same templates, which generally does not matter for web applications.
		Airspeed was conceived by Chris Tarttelin, and implemented jointly in a test-driven manner by Steve Purcell and Chris Tarttelin.
	airspeed.pythonconsulting.com (318 words)

	Airspeed Skateparks - Design, Build, Skate!
		Airspeed Skateparks is a cutting edge design/build firm that specializes in unique, custom-built concrete skateparks.
		Airspeed Lead Designer Geth Noble is shown skating Brightwater on the cover of this month's SESSION SKATEBOARDING MAGAZINE.
		Airspeed is still seeking a community with courage and vision where we can build the next step in public looping--the Double Funnel.
	www.airspeedskateparks.com (420 words)

	Airspeed - Activity
		In airport takeoff situations, the ground speed of the aircraft and the wind speed are the only factors in airspeed.
		Airspeed in this unique situation is a sum of the ship's speed through the water, wind speed, and the speed of the aircraft over the deck of the ship provided by the ship's catapult.
		Assume that the required airspeed for takeoff of an F-14 is 170 mph.
	www.grc.nasa.gov /WWW/K-12/BGA/Dan/airspeed_act.htm (349 words)

	More About Energy and Power [Ch. 7 of See How It Flies]
		As the airspeed rebuilds, you gradually release your tug on the yoke.
		In a descent, the airspeed for best (flattest) angle of glide is necessarily greater than the airspeed for best (slowest) rate of descent, as you can see in figure 7.9.
		For each point, the new airspeed is 71% of the old airspeed, and the new vertical speed is 71% of the old vertical speed.
	www.av8n.com /how/htm/power.html (8838 words)

	Aerospaceweb.org \| Ask Us - Types of Airspeed
		The difference between the dynamic and static pressures is used to determine the indicated airspeed (IAS) that is displayed to the pilot on the airspeed indicator in the cockpit.
		Equivalent airspeed is defined as the speed at sea level that would produce the same dynamic pressure as the true airspeed at the altitude the vehicle is flying at.
		While a pilot has the means at his or her disposal to calculate equivalent and true airspeeds, these are primarily intermediate results that are not typically needed in and of themselves.
	www.aerospaceweb.org /question/instruments/q0251.shtml (1575 words)

	low airspeed indicator (Site not responding. Last check: 2007-11-05)
		The low airspeed indicator, located in the pilot instrument panel, measures and displays low airspeed up to 50 knots by horizontal (fore-aft) and vertical (lateral) direction indicators.
		Airspeed is sensed by the airspeed and direction sensor.
		The intersection of the two direction indicators is related to the circular scale to obtain resultant airspeed.
	incolor.inetnebr.com /iceman/pilot04.htm (89 words)

	REA Computing True Airspeed Calculator
		The True Airspeed Calculator will allow a pilot to accurately determine the true airspeed of an aircraft using a GPS or loran unit.
		The indicated airspeed displayed on the aircraft's airspeed indicator (KIAS) should be identical to the indicated airspeed in the previous step.
		In the February 1995 issue of Kitplanes magazine, David Fox presented a method for determining the true airspeed of an aircraft using a loran or GPS unit and a pocket calculator.
	reacomp.com /true_airspeed (976 words)

	Aerospaceweb.org \| Ask Us - Airspeed and Ground Speed
		The difference between ground speed and airspeed is caused by the influence of winds on the overall velocity of the aircraft.
		Mach number is defined as the ratio of airspeed (V) to the speed of sound (a) at that altitude.
		A wind tunnel works by the principle that the aerodynamic forces on a body are the same whether the object moves through the air or the air moves past the object.
	www.aerospaceweb.org /question/instruments/q0210.shtml (1481 words)

	AIRSPEED aims to reduce production turnaround time (Site not responding. Last check: 2007-11-05)
		The AIRSPEED Team is made up of individuals from each of the three depots and headquarters and is working to develop a standardized "tool box" of cycle-time reduction methodologies.
		"AIRSPEED is planned for deployment throughout the depot corporation over the next 30 months, and during this time it will be integrated with initiatives that are currently ongoing with organization and intermediate level fleet folks to create a totally integrated naval aviation maintenance enterprise," Widick said.
		Massenburg's vision for AIRSPEED is to incorporate the most current business and cycle-time reduction processes across the NAVAIR enterprise to enable reduced cycle times to meet the requirements of the 21st century warfighter and beyond, according to NAVAIR Depot North Island Executive Officer Capt. Tim Trainer.
	www.dcmilitary.com /navy/tester/8_27/national_news/24101-1.html (1331 words)

	[CF-metadata] Four Definitions of Airspeed (Site not responding. Last check: 2007-11-05)
		Besides "Indicated Air Speed" (what a pilot would see, in theory, on his airspeed gauge), there are at least 3 other definitions of airspeed, as I learned at http://www.mathworks.com/access/helpdesk/help/toolbox/aeroblks/aero_s16.html Measuring Airspeed To measure airspeed, most light aircraft designs implement pilot-static airspeed indicators.
		Pilot-static airspeed indicators measure airspeed by an expandable capsule that expands and contracts with increasing and decreasing dynamic pressure.
		This is known as calibrated airspeed (CAS), which denotes the airspeed that a pilot would see in the cockpit of an aircraft.
	www.cgd.ucar.edu /pipermail/cf-metadata/2005/000587.html (178 words)

	Avid Introduces Revolutionary Broadcast Video Server: AirSpeed
		“The AirSpeed system is a fresh, cost-effective approach to the problems of efficiently acquiring material and getting broadcast stories to air, from start to finish,” said David Schleifer, director of Broadcast and Workgroups for Avid.
		The AirSpeed system can be programmed and operated from any workstation or controlled locally from the front panel.
		Multiple AirSpeed units can be pooled to share the same media, providing redundancy for fast, accurate playout from the rundown.
	www.avid.com /company/releases/2004/040418_airspeed_prod.html (648 words)

	Airspeed Indicator
		When the aircraft is not moving, the pressures are equal (and the airspeed is zero).
		TAS is the actual airspeed of the aircraft through the air mass.
		As an aircraft climbs, the indicated airspeed will decrease as the air becomes thinner and the impact pressure is reduced.
	www.allstar.fiu.edu /aero/airspeed.htm (513 words)

	Airspeed
		The torque of the engine and inertia of the heavy propeller tends to twist the aircraft around the propeller shaft and the consequent roll may increase the aoa of the downgoing wing past the critical aoa.
		The parameters for a light aircraft usually are the limiting critical airspeeds – Va, Vne, Vno, Vs1 and Vso; the certificated load limits and possibly an angle of bank limitation – e.g.
		Regulations for type certificated aircraft require that the complete airspeed indicating system of pitot head, static vent, connecting tubes and instrument be tuned so that the IAS reading is within 3% of the true reading over the normal airspeed range from Vs to Vc.
	www.auf.asn.au /groundschool/umodule2.html (9584 words)

	NAVAIR AIRSpeed Homepage (Site not responding. Last check: 2007-11-05)
		The term AIRSpeed means how fast an aircraft flies in relation to the air in which it is flying.
		The air we're flying in, a transformational Navy, is congested with demands for newer and faster technologies.
		Encouraged by the results, we are convinced that AIRSpeed is a necessary set of tools that each of us needs to master so we can do our jobs better.
	www.navair.navy.mil /navairairspeed (267 words)

	TGH Catalog: True Airspeed
		The 8100 Series True Airspeed Indicator is intended for use on an aircraft to indicate the speed relative to the air at sea level and at any other altitude, to indicate the equivalent speed corresponding to the actual force of the air.
		When properly connected to an airspeed tube, mounted so as to be in undisturbed air, the airspeed indicator measures the differential pressure developed between the pitot and static opening.
		The pressure is indicated in units of airspeed (mph and or knots).
	www.gyrohouse.com /catalog/subcat80.html (171 words)

	style.org > Estimating the Airspeed Velocity of an Unladen Swallow
		Estimating the Airspeed Velocity of an Unladen Swallow
		We can estimate the airspeed of the European Swallow to be roughly 11 meters per second (15 beats per second * 0.73 meters per beat).
		The maximum speed the birds could maintain was 13–14 meters per second, and although the Lund study does not discuss cruising flight in particular, the most efficient flapping (7 beats per second) occurred at an airspeed in the range of 8–11 meters per second, with an amplitude of 90–100° (17–19 cm).
	www.style.org /unladenswallow (1050 words)

	Airspeed Consulting - Business Systems Analysis and Software Development
		Airspeed delivers value for your Information Technology consulting budget by designing reliable solutions that help you achieve your strategic goals.
		Airspeed specializes in helping you use IT to achieve your operational, tactical, and strategic goals.
		Airspeed's team of seasoned professionals can provide resources to staff your existing project, or develop a solution from inception through analysis and development to implementation.
	www.airspeed.ca (232 words)

	True Airspeed System (Site not responding. Last check: 2007-11-05)
		A true airspeed measurement system is a combination of sensors, data acquisition equipment, a calculation and data storage medium, controlling software and an output device.
		Additional requirements for accurate true airspeed measurement include a data acquisition system that can concurrently read the signals from each of the three inputs so that calculations of airspeed can be made with instantaneous data.
		True airspeed is not stored in the A matrix however the user can extract any row from the A matrix and use the function SPEED to calculate it.
	home.att.net /~jroal/aspeed.htm (2240 words)

	NIST Calibration Services: Airspeed Instruments
		Calibration of airspeed measuring devices such as Pitot-static tubes, thermal, ultrasonic, and vaned anemometers are performed in two wind tunnels ("Air Speed Calibrations at the National Institute of Standards and Technology", 1992).
		A normal airspeed calibration consists of the average of ten independent measurements at seven to thirteen air speeds.
		Examples include in-situ calibrations of airspeed instrumentation, proving other airspeed instrumentation, proving other airspeed measurement systems, and tests where appropriate scaling will allow the results to be applicable to fluids other than air, and wind speed and wind direction.
	ts.nist.gov /ts/htdocs/230/233/calibrations/mechanical/airspeed.htm (362 words)

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