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  2. Robinson R22 - Wikipedia

    en.wikipedia.org/wiki/Robinson_R22

    The R22 Beta II received a larger Lycoming O-360 engine derated for sea-level operation. It allows greater altitudes for hovering in and out of ground effect (HIGE/HOGE). The R22 Beta II also made the engine speed governor standard and included a carburetor heat assist, which correlates adding carburetor heat with a decrease in collective control.

  3. Chlorodifluoromethane - Wikipedia

    en.wikipedia.org/wiki/Chlorodifluoromethane

    R-458A is for use in air conditioning and refrigeration applications, without capacity or efficiency loss. Works with MO, AB, and POE oils. [13] R-32 or HFC-32 (difluoromethane) is for use in air conditioning and refrigeration applications. It has zero ozone depletion potential (ODP) [2] and a global warming potential (GWP) index 675 times that ...

  4. List of R-phrases - Wikipedia

    en.wikipedia.org/wiki/List_of_R-phrases

    R22 Harmful if swallowed R23 Toxic by inhalation R24 Toxic in contact with skin R25 Toxic if swallowed R26 Very toxic by inhalation R27 Very toxic in contact with skin R28 Very toxic if swallowed R29 Contact with water liberates toxic gas. R30 Can become highly flammable in use R31 Contact with acids liberates toxic gas R32

  5. R22 - Wikipedia

    en.wikipedia.org/wiki/R22

    R22 (New York City Subway car) Chlorodifluoromethane, a refrigerant; Fiat R.22, an Italian reconnaissance aircraft; Ndonga dialect; R22: Harmful if swallowed, a risk phrase; R-22 Spearhead, a fictional starfighter in the Star Wars universe; Robinson R22, an American helicopter; R22 refrigerant

  6. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot. The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2-inch gauge railway modelling with both electric and live steam operation. Gauge '3' corresponds to NEM II scale, also known as "Spur II" in ...

  7. Automotive air conditioning - Wikipedia

    en.wikipedia.org/wiki/Automotive_air_conditioning

    In such an air conditioning system, the accumulator also prevents the liquid refrigerant from reaching the compressor during low cooling demand periods. The air, often after being filtered by a cabin air filter , is blown by an adjustable speed electric powered centrifugal fan across the evaporator, causing the liquid part of the cold ...

  8. American wire gauge - Wikipedia

    en.wikipedia.org/wiki/American_wire_gauge

    Any two successive gauges (e.g., A and B) have diameters whose ratio (dia. B ÷ dia. A) is (approximately 1.12293), while for gauges two steps apart (e.g., A, B, and C), the ratio of the C to A is about 1.12293 2 ≈ 1.26098. Similarly for gauges n steps apart the ratio of the first to last gauges is about 1.12293 n.

  9. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    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.