spat /spt/ noun a streamlined cover-ing for a wheel fitted on a light aircraft to reduce drag. Also called wheel fair-ing
spatial disorientation noun a situ-ation of bad visibility and/or unusual manoeuvres which result in the pilot not knowing what attitude the aircraft is in
speaker /spik./ noun . loud-
speaker special /spe.(.)l/ adjective particu-lar, specific, or not ordinary . To make a composite, it is necessary to combine the reinforcing glass fibres with some form of special glue. . noun a special meteorological report
special aerodrome report
/spe.(.)l e.r.dr.υm r.p.t/ noun
report used if there are significant weather changes since the last meteoro-logical aerodrome report. Abbreviation
SAR special VFR flight noun a control-led VFR flight permitted by air traffic control to fly within a control zone in meteorological conditions below visual meteorological conditions
specific /sp.s.f.k/ adjective clearly
defined and definite . Flight levels are specific pressure altitudes. . The air-frame has to be built to very specific requirements.
specification /spes.f.ke..(.)n/
noun a detailed description that sets out what something consists of, what is needed, what is involved, etc. . Fluids are coloured for recognition purposes and fluids of different specifications must never be mixed.
specific gravity /sp.s.f.k rv.ti/ noun the density of a sub-stance compared with that of water, which is 1.00 (NOTE: This is the old name for relative density.)
specify /spes.fa./ verb to name in detail . The minimum values for deci-sion heights are specified by the national licensing authorities for vari-ous types of aircraft and for various air-ports. . Pressure must be maintained within specified limits during all phases of flight.
specimen /spes.m.n/ noun a part taken as an example of the whole . By testing specimen structures and compo-nents to destruction a safe life can be assessed for all such structures and components.
speed /spid/ noun the rate of motion over a distance in time
215 spool
sphere /sf../ noun an object in the shape of a ball . The Earth is not a per-fect sphere. . A circle drawn on the sur-face of a sphere, whose plane passes through the centre of the sphere is called a great circle.
spherical /sfer.k(.)l/ adjective
shaped like a sphere . The Earth is almost spherical in shape. . Drain cocks are generally simple, manually operated spherical valves.
spill /sp.l/ noun the running out of a liquid from a container, especially when it is unintentional . an oil spill . a fuel spill . verb to cause liquid to run out of a container, usually unintentionally . If fuel is spilt, it creates a fire hazard.
(NOTE: spilling – spilled or spilt)
spillage /sp.l.d/ noun the spilling of a liquid . Any fuel spillage must be cleaned up immediately. (NOTE: The word spillage is used in a more general sense than the word spill.)
spin /sp.n/ noun 1. fast rotation . the spin axis of the earth 2. the continued spiral descent of an aircraft where the angle of attack of one wing is greater than the stalling angle . verb 1. to rotate rapidly . The Earth is spinning on its axis. 2. to put an aircraft into a contin-ued spiral descent with the angle of attack of the mainplane greater than the stalling angle . It is prohibited to spin general-purpose light aircraft which are not equipped with a suitable har-ness.
|
