airspeed indicator manufacturer, custom airspeed indicators wholesaler from China ELE Electric Products

airspeed indicator

Founded in 1996, China ELE Electric Products Co., Ltd is professional airspeed indicator manufacturer and supplier specializing in developing and producing all kinds of electrical products and accessories. As an enterprise certified by ISO9001 system strictly, we have also got many safety certificates, such as CB, SEMKO, FIMKO, ESC, CCC, VED, UL, CE etc. We have great capacity to develop new airspeed indicators products, plastics and mental products according to our clients.

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airspeed indicators show

The Airspeed indicator measures how fast the airplane is moving through the air.The picture above is similar to the one in N4907J but is from a slightly slower type of airplane.On N4907J it is calibrated in miles per hour (MPH) although it has a second scale calibrated in knots as well.The indicator works by comparing ram air pressure with regular outside pressure.Although this method sounds rudimentary, modern airliners use the same technique.This speed is different from how fast the airplane moves over the ground because there might be a tail wind or headwind.
The airspeed indicator has colored bands indicating important speed ranges for the airplane.The white band indicates the permissible operating range with full flaps. This is slower than the normal operating range and is normally used for approaches and landings (and sometimes takeoffs). The green band is called the normal operating range and is normally used with flaps up (these ranges overlap quite a bit). The yellow band is not really a warning band but is only to be used in relatively smooth air. Most airplanes cruise near the top of the green band. This is normal. The lower portion of the yellow range is used for descents unless turbulence is present so seeing the needle flick into the yellow range should not be a cause for concern. At the top is a red line that represents the maximum speed that should ever be used.

The 8200 Series Maximum Allowable Airspeed Indicator displays the Indicated Airspeed and the Maximum Allowable Airspeed simultaneously. Indicated Airspeed is the difference between pitot pressure and static pressure. The expansion of the Indicated Airspeed diaphragm by the differential pressure causes the rotation of the sector gear and pinion which in turn moves the pointer. The vacuum diaphragm for the Maximum Allowable Airspeed is expanded by the static pressure. This displacement is transferred to the sector gear and pinion as an angular motion, and it is indicated on the scale as Maximum Allowable Airspeed by the pointer.
A high speed airplane has a maximum allowable airspeed, limited by Mach number, which depends on its structural design. It is necessary to know the maximum allowable airspeed equivalent to Mach number as well as the indicated airspeed in order to avoid damage to the aircraft structure. This instrument has an altitude diaphragm (vacuum dia-phragm) to correct the maximum allowable airspeed which changes with the altitude. The Mach number, based on the aircraft's structure, is pre-set; and the correct maximum allowable airspeed equivalent to the specific Mach number is indicated by the pointer.
Certification: FAA TSO C46
Case configuration: MS33638, 3.25" x3.25" x 3.9" maximum
Typical Weight: 2 pounds maximum
MAAS Adjustable Range: within a range of 0 to 41,000 feet per request
Static, Pitot Pressure Port: 0.4735 (7/16)-20UNF-3B threads
Finish: Dull Black Paint