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is demanded of the engine (it is throttled back) so it is developing much less heat. In a descent, the plane's airspeed increases, simultaneously increasing the cooling rate of the engine. As metals expand and contract under temperature changes, dimensional changes in the engine may exceed tolerance
94:
during flight that is purported to cause damage in most engines. Equally, it has been pointed out the rate cylinder head temperatures drop off after a normal engine shutdown is often much faster than the usual rates deemed to present a shock cooling risk. Complicating the analysis, high operating
86:. This position is supported by the fact twin engine planes commonly experience ideal conditions for shock cooling during simulated, single engine failures, yet statistically show no difference in wear or damage
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107:, or in more sophisticated installations, an array of sensors, one for each cylinder, may be employed to monitor the temperature and cooling rate of the engine.
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temperatures in of themselves, can contribute to excessive component wear and damage, which is typically associated with "shock cooling".
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on the wings may also be deployed to lose lift without having to reduce engine power substantially, slowing the rate of engine cooling.
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between engines. Doubts have been raised regarding the plausibility of achieving the temperature reduction in
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While the subject is very controversial, some believe shock cooling, as commonly explained, is nothing but a
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Damage from shock cooling is most commonly believed to manifest itself as stuck
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refers to the theory that damage to engines (particularly
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41:The situation where rapid cooling arises is on
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146:"How to Avoid Sudden Cooling of Your Engine"
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45:from altitude. In this condition, less
193:"Shock Cooling: Time To Kill The Myth"
105:cylinder head temperature (CHT) sensor
7:
173:Bedell, Peter A. (5 November 1996).
251:components, systems and terminology
32:air-cooled aviation piston engines
25:
129:"Shock Cooling: Myth or Reality?"
573:Propeller speed reduction unit
62:, excessively worn or cracked
1:
383:Capacitor discharge ignition
841:
393:Electronic fuel injection
439:Aircraft engine starting
99:Detection and prevention
88:probability distribution
484:Mean effective pressure
18:Shock cooling (engines)
524:Time between overhauls
799:Ice protection system
539:Volumetric efficiency
504:Overhead valve engine
784:Auxiliary power unit
664:Flight data recorder
115:Notes and references
753:Pressure carburetor
489:Naturally aspirated
459:Engine displacement
131:. 19 February 1997.
768:Updraft carburetor
642:Engine instruments
568:Propeller governor
464:Four-stroke engine
812:
811:
649:Annunciator panel
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636:
547:
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529:Two-stroke engine
499:Overhead camshaft
479:Manifold pressure
449:Compression ratio
16:(Redirected from
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825:Aircraft engines
794:Hydraulic system
614:Counter-rotating
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310:Hydraulic tappet
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199:. 4 January 2018
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689:Engine controls
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609:Contra-rotating
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474:Ignition timing
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403:Ignition system
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175:"Shock Therapy"
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777:Other systems
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669:Glass cockpit
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300:Cylinder head
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54:Manifestation
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28:Shock cooling
19:
804:Recoil start
763:Turbocharger
758:Supercharger
624:Single-blade
534:Valve timing
513:
355:Sleeve valve
340:Poppet valve
315:Main bearing
201:. Retrieved
196:
187:
179:www.aopa.org
178:
153:. Retrieved
149:
123:
102:
81:
66:and cracked
57:
40:
27:
26:
748:Intercooler
674:Hobbs meter
599:Blade pitch
594:Autofeather
587:Terminology
494:Monosoupape
454:Dead centre
427:Terminology
335:Piston ring
305:Gudgeon pin
36:temperature
738:Gascolator
728:Carburetor
679:Tachometer
561:Components
553:Propellers
469:Horsepower
434:Air-cooled
413:Spark plug
378:Alternator
371:components
369:Electrical
350:Rocker arm
290:Crankshaft
268:components
266:Mechanical
398:Generator
103:A single
68:cylinders
819:Category
702:Throttle
619:Scimitar
325:Oil pump
295:Cylinder
285:Crankpin
275:Camshaft
246:Aircraft
150:Lycoming
109:Spoilers
78:Analysis
50:limits.
578:Spinner
418:Starter
408:Magneto
345:Pushrod
203:17 July
155:17 July
64:pistons
43:descent
716:system
519:Stroke
360:Tappet
330:Piston
60:valves
723:Avgas
659:EICAS
197:AVweb
47:power
712:Fuel
654:EFIS
444:Bore
205:2023
157:2023
84:myth
70:and
821::
195:.
177:.
165:^
148:.
137:^
74:.
38:.
238:e
231:t
224:v
207:.
181:.
159:.
20:)
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