AECTP 230 PDF

ICS, Doc ID, STANAG Ed 6. Title, CLIMATIC CONDITIONS – AECTP Edition 1. Original Title. Category, TS. Location. AECTP (Edition 1) Leaflet /2 World-wide Ambient Air Temperature and Humidity Conditions and Levels of Direct Solar Radiation Additional Climatic. NATO AECTP CLIMATIC CONDITIONS. Amendment by NATO Publication, 05/01/ This document is an amendment. View the base document.

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Acceleration of chemical and biological attack. Erosion by impact See paragraph 2.

aectp climatic conditions

Sand and dust a. Immersion, precipitation and spray a. Examples of such data obtained at two locations within an aircraft are in Annex A. Mechanical systems and components for general use Normal Operational Transient Changes Immersion, precipitation and spray See paragraph 2. Where internal ambient temperatures or temperature levels of individual components are of concern, expected temperature levels should be estimated using thermal analysis programs incorporating the influences given above supported by specific measurements made in representative conditions.

Man mounted and portable materiel may be subjected to rapid change of temperature during transfer from air conditioned buildings to external ambient conditions when deployed in geographical regions noted for their extremes of temperature both high-tolow and low-to-high temperatures.

Rotary-winged aircraft and materiel and stores on those aircraft are subject to spray generated by the downwash of the rotor of the host aircraft when hovering at low level aextp water. Pressure levels experienced by deployed materiel are the prevailing ambient conditions at all stages of operation.

Examples are materiel that is moved into cold outdoor ambient environments from a comparatively hot storage area. When power is applied either directly from the engine or from external supplies, on-board environmental control systems will distribute conditioned air to some compartments of the aircraft and to any aircraft carried stores to alleviate the effects of environmental conditions.

Conversely, such protective structures and temporary covers are also liable to be better radiators to the night skies than the ambient air, such that temperatures in enclosed compartments may be lower than the external ambient.

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Click here for more details. Humidity Reference 1 of Annex A gives advice on the protection of materiel from the effects of moisture-laden atmospheres. In the absence of measured data, severities may be derived from knowledge of maximum rates of climb and descent for the host aircraft. This is particularly applicable at airfields in hot, wet tropic regions, where the diurnal cycle characterised by high temperatures during the day and low temperatures at night produces variations of pressure in partially sealed, unventilated compartments.

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Equipment containing refrigeration systems will be particularly susceptible to condensation throughout a 24 hour period. Indeed, long-term ground running without forced-air cooling should be avoided in hot, dry regions, otherwise permanent damage or degraded reliability is likely to occur. Humidity in Fully Air-conditioned Compartments Preferably, test severities should be derived from specific measurements made on the intended transporting platform, on the intended flight platform, at the location in the compartment, or the area on deck during representative worst-case conditions expected in service.

This fron panel is realized so that the air contitioner can be easily installed and dismounted externally from the shelter by means of fork lift. Tailored test severities 4. Road and rail transportation For materiel carried in covered and in enclosed vehicles, icing of materiel during transportation normally arises entirely from the prevailing meteorological conditions.

Aectl ground running continues, the environmental control system becomes more effective. General AECTP includes test procedures that may be used to simulate the effects of induced climatic environments on materiel during storage.

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While subject to routine aecgp pressurisation tests, materiel fitted in aircraft compartments pressurised during flight may be required to remain in-situ to determine the integrity of seals. Wetting Precipitation, spray, drip, splash, and immersion are factors contributing to induced levels of wetting caused by dripping condensation from overhead surfaces, fire sprinklers, fractured pipes, leaking joints, cleaning operations, and exposure to splashing or immersion directly from operations in or near open waters.

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Dependent on the provision or otherwise of appropriate levels of ventilation or forced-air conditioning, materiel carried or installed within the protective structure or under temporary covers of trucks, trailers and fighting vehicles is liable to be subjected to conditions in excess of the local ambient due to the response of the vehicle to the external ambient conditions, heat emissions from power sources and operating aaectp carried on the vehicle and their duty cycles.

For ships manoeuvres in prevailing sea conditions, containers or stores placed above deck, and movement of vehicles or other types of service platforms that use the wectp as an operational base, can result in levels of wetting ranging from mild spray or splashing to rough seas. Reduced efficiency of cooling systems, particularly those that depend on convection and radiation to the surrounding atmosphere, resulting in: The level of ventilation is likely to be such that any moisture in the incoming air is liable to be retained during the heating phase of the next diurnal cycle, raising the relative humidity and dewpoint temperature inside the enclosure.

To assist test engineers in preparing test specifications by indicating which test methods are preferred when considering how to test for specific climatic environmental effects. The Drag Test of Document D.

Data on induced temperatures should be derived from measurements made at the intended location of materiel on the flight platform during representative worst-case conditions. High altitude aircraft and missiles High and low temperatures affect the physical and chemical characteristics of rocket fuels which may result in malfunction of motors of guided weapons.