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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
The Young's modulus of the test beams can be found using the bending IET formula for test beams with a rectangular cross section. The ratio Width/Length of the test plate must be cut according to the following formula: This ratio yields a so-called "Poisson plate".
The ability to gauge thickness measurement without requiring access to both sides of the test piece, offers this technology a multitude of possible applications. Paint thickness gauges, ultrasonic coating thickness gauges, digital thickness gauges and many more options are available to test plastics, glass, ceramics, metal and other materials.
The governing standard for the Barcol hardness test is ASTM D 2583. [4] Barcol hardness is measured on a scale from 0 to 100 with the typical range being between 50B and 90B. A measurement of 60B is roughly equivalent to a Shore hardness of 80D or a Rockwell hardness M100.
When a test fails to meet the thickness and other test requirements that are in place to ensure plane strain conditions, the fracture toughness value produced is given the designation . Fracture toughness is a quantitative way of expressing a material's resistance to crack propagation and standard values for a given material are generally ...
Snell & Wilcox SW2 and SW4 "Zone Plate" Test Chart (also referred to as Snell & Wilcox Test Pattern) were TV test cards introduced in the 1990s and used with NTSC, PAL and SDTV systems. [ 1 ] Popular versions of the test charts were made available on Laserdisc and DVD-Video , allowing home users and professionals to test and calibrate their ...
Top Plate – MR-710 Fregat, a target designation radar [4] [Note 1] Top Plate-B – MR-760 Fregat, an air search radar [9] Top Sail – Long-range air search radar [1] Top Steer – Long-range air search radar [1] Top Trough – Long-range air search radar [1] Trap Door – Missile tracking and control [1] Trash Can – Tamara ELINT system
Required Navigation Performance provides a specified level of navigational accuracy for the airspace or stage of flight an aircraft is operating in. Required navigation performance (RNP) is a type of performance-based navigation (PBN) that allows an aircraft to fly a specific path between two 3D-defined points in space.