shock stall
Language: English
Part of speech: verb
Pronunciation: ipa: /ˈʃɒk ˌstɔːl/
ipa: /ˈʃɑk ˌstɔl/
Forms: form: shock stalls
form: shock stalling
form: shock stalled
form: shock stalled
form: shock-stall
Etymology: The noun is derived from shock + stall (“loss of lift due to an airfoil’s critical angle of attack being exceeded”). The verb is derived from the noun.
Senses: examples: text: The tailplane usually becomes more effective as a stabiliser at high Mach numbers because there are decreases of wing lift-curve slope and rate of change of downwash with mean lift coefficient. The latter effect is mainly due to the wing-root shock stalling at a lower Mach number than the rest of the wing.
ref: 1947, S. Kirkby, A[braham] Robinson, Interference on a Wing due to a Body at Supersonic Speeds (Aeronautical Research Council Reports and Memoranda; no. 2500), London: Her Majesty's Stationery Office, published 1952, →OCLC, page 23:
text: [A] loss of downwash due to the main wing shock stalling would result in an undesirable diving tendency.
ref: 1947 January, The Journal of the Royal Aeronautical Society, volume 51, part 1, London: Royal Aeronautical Society, →ISSN, →OCLC, page 130, column 1:
text: The separation of the flow over wings precipitated by the compression shock that forms as speeds are increased into the supercritical Mach number range has imposed serious difficulties in the improvement of aircraft performance. These difficulties arise principally as a consequence of the rapid drag rise and the loss of lift that causes serious stability changes when the wing shock-stalls.
ref: 1948 August, John Stack, W. F. Lindsey, “Summary”, in Characteristics of Low-aspect-ratio Wings at Supercritical Mach Numbers (National Advisory Committee for Aeronautics Technical Note; no. 1665), Washington, D.C.: National Advisory Committee for Aeronautics, →OCLC, page 1:
text: In fact, in this case, after stalling in the normal manner, he would probably have fallen off in a dive and in doing so, increase his speed until he shock[-]stalled before effecting recovery.
ref: 1949 June, R. G. Naugle, “Are Jet Fighters Overrated?”, in William B[ernard] Ziff [Sr.], editor, Flying, volume 44, number 6, Chicago, Ill.: Ziff-Davis Publishing Company, →ISSN, →OCLC, page 68, column 1:
text: As a result of these tests it was shown that at the design incidence the conventional cascade shock stalled at some 75 per cent of the critical inlet velocity.
ref: 1949 October, K. W. Todd, An Experimental Study of Three-dimensional High-speed Air Conditions in a Cascade of Axial-flow Compressor Blades (Aeronautical Research Council Reports and Memoranda; no. 2792), London: Her Majesty's Stationery Office, published 1954, →OCLC, archived from the original on 03 Oct 2015, page 1:
text: When the wing shock stalls, the lift gradient a falls and, if no shock stalling occurs on the tail plane, the term #92;frac#123;a#95;1#92;bar#123;V
ref: 1951, staff of the RAE [Royal Aircraft Establishment] High Speed Wind Tunnel, High Speed Wind Tunnel Tests on Models of Two Jet-propelled Fighters (Meteor and Vampire) (Aeronautical Research Council Reports and Memoranda; no. 2504), London: Her Majesty's Stationery Office, →OCLC, page 35:
topics: aeronautics
aerospace
aviation
business
engineering
natural-sciences
physical-sciences
glosses: Of an aircraft or a component of it: to undergo a shock stall.
Derived terms: word: shock-stalled
word: shock stalling