Air speed indicator

Air speed indicator - Factbites
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Topic: Air speed indicator

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In the News (Sun 27 May 12)

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	index11.html
		The red line on an airspeed indicator indicates the maximum speed at which the airplane can be operated in smooth air, which should never be exceeded intentionally.
		The pitot-static system is a source of air pressure for the operation of the altimeter, airspeed indicator, and vertical speed indicator.
		The maximum speed at which the airplane can be operated in smooth air is indicated by the red radial line.
	www.coryat.com /faa-pp-written/index11.html

	Global Aviation
		This highly accurate Airspeed Indicator gives the speed of the airplane in relation to the air.
		2 �" Air Speed Indicator (available in knots)
		3 1/8" Air Speed Indicator (available in knots)
	www.globalav.com.au /uma_flight_instruments.html

	Encyclopedia: Vertical speed indicator
		A variometer (also known as a rate-of-climb indicator, a vertical speed indicator (VSI), or a vertical velocity indicator (VVI)) is an instrument in an aircraft used to inform the pilot of the rate of descent or climb.
		The information that glider pilots really need to enable them to soar is not the vertical speed of the glider itself, but the vertical speed of the air through which it is flying.
		Although they could readily detect abrupt changes in vertical speed ("in the seat of the pants"), their senses did not allow them to distinguish lift from sink, or strong lift from weak lift.
	www.nationmaster.com /encyclopedia/Vertical-speed-indicator

	abtinst.html
		The airspeed indicator is important to help the pilot maintain airspeed comfortably higher than the machine's stall speed at all times, and, because two-stroke engines are aluminum and prone to overheat if not properly tuned, we think it's necessary to continually take the engine's temperature to avoid sudden silences.
		If your air speed indicator seems to be working okay, but reads consistently higher or lower than you believe your speed to be, chances are good that you have a "static" pressure problem, not a defective instrument.
		Because the instrument is measuring he difference between the air pressure in the pitot tube and that surrounding the instrument.
	www.airstuff.com /abtinst.html (5091 words)

	Comair Flight 3272 - The Enquirer - January 16, 1997
		A third indicator, a standby air-speed indicator, is independent from the first two, so it is virtually impossible that all three could give identical - incorrect - readings, Mr.
		It is possible the air-speed indicators were working properly but that pilots simply did not monitor them closely enough, he said.
		Seventeen seconds before the crash, the plane was in a turn and the air speed had dropped to 167 mph.
	www.enquirer.com /comair3272/loc_crashmain0116.html (625 words)

	USHGA - Articles - Rigid Wing Accident Report
		Instructors for these craft need to not just mention keeping speeds in check, but develop actual training methodologies that drive the correct behavior into the pilots who typically have years of experience and habit not using an air speed indicator.
		Mike had two airspeed indicators on the glider, a Hall indicator and a Tangent flight computer suspected of being used more for the vario function.
		Please bear in mind that the air loads increase with the square of the flight speed yielding the following results:
	www.ushga.org /article10.asp (2359 words)

	Pushing The Envelope With Test Pilot Herb Fisher
		Air speed indicators of the era were not designed to cope with descents that could exceed 40,000 feet per minute.
		There is little doubt that the pilots who reported speeds in excess of Mach 1 were honestly and accurately reporting what they has seen on their air speed indicator.
		However, due to the extreme rate of descent, the pressure differential in the static pressure airspeed indicator lags far behind the actual altitude of the aircraft.
	home.att.net /~historyzone/Fisher.html (2043 words)

	Innovative Solutions & Support
		Innovative Solutions and Support exclusive Air Data Systems offer a wide range of instruments that are RVSM compliant including, Altimeters, Mach Air Speed Indicators, Digital Air Data Computers (DADC), Air Data Display Units (ADDU), Alerters and Analog Interface Units (AIU).
		Innovative Solutions and Support's exclusive Engine Indicator is a great way to replace six different instrument types with one part number.
		Innovative Solutions and Support has taken digital fuel gauging to a new level with a single part number for both Indicator and Totalizer, simplifying maintenance.
	www.innovative-ss.com /Product1.htm (261 words)

	Vertical Speed Indicator
		However, when flight conditions are relatively calm and the aircraft is in level flight, it can be used as a trend instruments due to the vertical speed indicator needle became generally more sensitive than the altimeter and so responding more quickly to any variations of altitude.
		A vertical speed indicator is essentially a sensitive differential pressure gauge which is connected to the static tube to indicate the rate of change in static pressure.
		Therefore whenever the aircraft climbs, the pressure in the case will remain slightly higher than that within the capsule and the indicating mechanism will cause the pointer to indicates the rate of climb.
	home.freeuk.net /pc4084/page3.html (261 words)

	Airspeed indicator - Wikipedia, the free encyclopedia
		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.
		Along with the altimeter and vertical speed indicator, the airspeed indicator is a member of the pitot-static group of aviation instruments, so named because they operate by measuring pressure in the pitot and static circuits.
		The airspeed indicator is an instrument used in an aircraft to display the craft's airspeed, typically in knots, to the pilot.
	en.wikipedia.org /wiki/Airspeed_indicator (911 words)

	Patent 4539843: Altimeter and vertical speed indicator
		The switching of sample times and the selection of the proper algorithm to determine the vertical speed of the aircraft from the air pressures measured is a function carried out by interaction of signals between controller 36 and vertical speed signal processor 51, without any input or knowledge of the fact by the operator.
		In actual operation the altitude and vertical speed readings are simultaneously displayed on the indicators at all times with new readings occuring approximately every two seconds, and the barometric pressure setting being displayed automatically only at turn-on of the instrument.
		It also becomes possible with this method to average several vertical speed readings prior to display, when the aircraft is determined to be in level flight and then return to a faster updated, non-averaged, reading automatically when the aircraft is being maneuvered.
	www.freepatentsonline.com /4539843.html (911 words)

	Industrologic VSI-1000 Vertical Speed Indicator/Voltage Output Altimeter - Description and Features
		The Industrologic VSI-1000 Vertical Speed Indicator/Voltage Output Altimeter is a ruggedized instrument designed for parachute air drop testing and other applications where vertical speed at low altitudes needs to be determined by use of a voltage output into a data logger.
		This scale and span allows quick and easy vertical speed determination by using time versus altitude change calculations.
		The VSI-1000 is enclosed in a rugged die cast aluminum enclosure approximately 4.5" by 2.5" by 1.25", and comes with a pre-wired shielded cable connected to screw terminal blocks which can be easily changed by the user if desired.
	www.industrologic.com /vsidesc.htm (911 words)

	FAQ
		Most Malibu's have dual air speed indicators, but both are driven from a single pitot tube under the wing.
		We have modified this system to include two pitot tubes, each driving its own air speed indicator.
		To increase the accuracy of the air speed measurement, we have mounted the pitot tubes at the end of the wing where there is less turbulent airflow.
	www.jetprop.com /faq.html (1527 words)

	The Racing Campbells - Donald & Malcolm Campbell - Tommy Watts: Australia's First Jet Powered Hydroplane
		While unofficial runs at later dates saw the air speed indicator show speeds in excess of 180 mph, Officials would not allow sanctioned runs to occur because of concerns for the safety of all concerned.
		A tachometer and air speed indicators being mounted on top of the dashboard behind a cut down jet fighter cockpit screen.
		Sadly, on a country road just out of his boyhood town of Rosedale on a Sunday morning several years later, Watts lost control of the truck at a speed in excess of 160 mph, while attempting to set a new record speed, and ran onto a railway line running adjacent to the road.
	www.racingcampbells.com /content/campbell.archives/tommy.watts.asp (895 words)

	Accident Report MEA Caravelle 17 APR 64
		It is to be noted also that the airspeed indicator and the altimeter in both the Caravelle III and Caravelle VI N occupy respectively the same geographical position on the instrument panels, thus making a possibility of error unlikely.
		a) pilot's and co-pilot's altimeters, air speed indicators and vertical speed indicators;
		Evidences indicated that at the time the aircraft struck the water it was in an approach configuration (10° flap setting and undercarriage extended).
	www.geocities.com /CapeCanaveral/9575/640417-0.htm (3309 words)

	PILOT APTITUDE BTY TEST
		THIS IS A VERTICAL SPEED INDICATOR, INDICATING THAT AIR CRAFT IS "DESCENDING "
		We have uploaded a few Basic Instruments which you will see in an Aircraft.
		THIS IS A "TURN AND SLIP INDICATOR" SHOWING READING "Steep Turn to the left,Slipping to the Inside."
	www.defenceacademy.8m.com /photo4.html (3309 words)

	[hpv] Wind Speed Indicators (was altimeters)
		Such an indicator is extremely sensitive to subtile movements of air between 0 - 3 mph (0 - 4.8 km/h).
		Scott said: > > I suppose wind speed, or more specifically Air Speed is the important > > thing to measure when testing fairings on the road.
		Personally I would be a little leary of ordering on-line from them at the moment, and might prefer using the 800 telephone number.
	www.ihpva.org /pipermail/hpv/2000-January/001864.html (345 words)

	Digifly FAQs
		This is required to allow your instrument to display your air speed.
		You need the optional air speed probe, required to allow your instrument to determine your air speed.
		How do I get my Digifly flight instrument to display the air speed?
	www.digiflyuk.com /faqs.htm (1096 words)

	Flight Instruments
		Kit contails self adhesive coloured markings for one 80mm single sweep airspeed indicator and up to five VDO type pressure/temperature gauges.
		Gyro Horizon-air, controlled by an air driven precision gyroscope to present the pilot with pitch and roll information, through the full 360° “pictorial” presentation.
		Operating range 2 min, or 4 min turn.
	www.skydrive.co.uk /sd_fi.asp (141 words)

	RV.Net Open Roads Forum: Class A Motorhomes: Air Speed Indicator
		It shows if the wind is helping me or hurting me. I.e., If the air speed indicator shows 20 mph and the GPS 40 then the winds are helping me. If the air speed indicator shows 50 and the GPS shows 40 then I have a 10 mph hour head wind.
		Has anyone ever mounted an air speed indicator on their rig?
		Conventional airspeed indicators (like used on aircraft)are rigidly mounted and measure impact air pressure straight on.
	www.rv.net /forum/Index.cfm/fuseaction/thread/tid/15439537.cfm (738 words)

	Knowledge Review on Altimeter, Air speed Indicator & Vertical Speed Indicator
		Knowledge Review on Altimeter, Air speed Indicator and Vertical Speed Indicator
		According to the vertical speed indicators shown below in each case, is the airplane climbing, descending or in level flight?
		Knowledge Review on Altimeter, Air speed Indicator and Vertical Speed Indicator - Level 1
	www.allstar.fiu.edu /aero/instrev1.htm (738 words)

	ALERT Lite Users manual
		Air Speed Indicator (ASI): Displayed airspeed is more or less than real airspeed or instrument inoperative
		Vertical Speed Indicator (VSI): Displayed vertical speed is more or less than real vertical speed or instrument inoperative
		Vacuum system: Vacuum powered indicators on specific airplanes are inoperative
	www.flytechsoft.com /docpro/fulllist.htm (738 words)

	Mensor Corporation Technical Notes and Application Notes
		, A large international avionics equipment manufacturer needs to determine the sensitivity of their anaerobic capsules used in the manufacture of altimeters, air speed indicators, and rate of climb meters.
		, The customer was using a pressure indicator / transmitter to control nitrogen pressure in three large-volume tank.
		A fast, economical and accurate way of determining the sensitivity of the capsule in a production environment was required.
	www.mensor.com /Technical_Info.htm (1221 words)

	vertical speed indicator
		The pilot and gunner vertical speed indicator displays the helicopter ascent and descent speed in feet per minute.
		This instrument is connected to the static air system.
		The indicator is actuated by the rate of atmospheric pressure change.
	incolor.inetnebr.com /iceman/pilot01.htm (1221 words)

	Mach airspeed indicator - Patent 4319333
		However, there are no prior art mach airspeed indicators known to applicant capable of internally computing VMO and/or mach number from measured altitude and airspeed for directly driving the VMO and/or mach displays, such as by closing a stepper servo motor servo loop for such a display by the internal computer.
		In addition, by utilizing the mach air speed indicator of the present invention, the command air speed bug may be selectively driven by a performance data computer or other computer to indicate to the flight crew the optimum air speed as well as also being selectively manually settable on the instrument.
		The present invention relates to airspeed indicator apparatus and particularly to mach airspeed indicators capable of displaying mach and VMO from measured altitude and airspeed data.
	www.freepatentsonline.com /4319333.html (8986 words)

	Airspeed - Wikipedia, the free encyclopedia
		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, as 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.
		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.
	en.wikipedia.org /wiki/Airspeed (492 words)

	Airspeed Calibration
		When the true airspeed is exactly the same at high altitude as at low, the high altitude indicated airspeed is lower.
		Indicated airspeed: the speed shown by the airspeed gauge.
		Calibrated indicated airspeed: the speed you would calculate by applying a correction factor to the indicated airspeed.
	home.flash.net /~dmprosvc/dave/airspeed.htm (1774 words)

	CHECK LISTS FOR MEDIUM SPEED ENGINES
		For four-stroke medium speed diesel engines running on HFO, a quick and practical check for burnt exhaust valves is to roll the engine with turning gear whilst feeling with the back of your hand expelled compression gases at each cylinder indicator cock.
		However, due to the difficulty in locating piston ring blow-by with some data collecting equipment, it might be necessary to revert back to the tried and tested method of putting air into each cylinder via the indicator cock, with the piston on the compression stroke just after the inlet and exhaust valves have closed.
		By listening for high pressure starting air leaks, first from the indicator cocks and then the starting air lines, a number of leaks can be detected.
	www.msc.navy.mil /n7/lcm/LCIN004.htm (1774 words)

	Types of Airspeed
		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.
		For example, at cruise altitude, the airspeed indicator on the Boeing 737-400 may indicate about 280 knots when the airplane's actual speed through the air is more than 400 knots.
		Indicated airspeed drops as you climb, because as the density of the air decreases with altitude, fewer air molecules hit the pitot tube.
	www.abbysenior.com /aviation/typesof.htm (445 words)

	Wills Wing, Inc. - hall Information Page
		The design of the Hall type airspeed indicator involves using a ram air versus static pressure differential to raise a disc in a tapered tube against the force of the weight of the disc.
		An airspeed indicator will help you to fly at the appropriate speed for a given situation and when compared with variometer readings yields a wealth of information about the performance of your wing.
		The Hall Airspeed Indicator is a simple, reliable way to keep track of your airspeed while flying.
	www.willswing.com /prod2.asp?theClass=inst&theModel=hall (517 words)

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In the News (Sun 27 May 12)