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An air cycle machine (ACM) is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine-powered aircraft. Normally an aircraft has two or three of these ACM. Each ACM and its components are often referred as an air conditioning pack.
The primary component for the functioning of the cold air unit (CAU) is the Air Cycle Machine (ACM) cooling device. Some aircraft, including early Boeing 707 aircraft, used vapor-compression refrigeration like that used in home air conditioners. An ACM uses no Freon: the air itself is the refrigerant. The ACM is preferred over vapor cycle ...
Aircraft carrier operations ACM Air cycle machine: Part of A/C air conditioning system ACMS Aircraft condition monitoring system ACP Audio Control Panel ACR Avionic Communication Router ACS 1: Airman Certification Standards [4] FAA pilot testing ACS 2: Audio control system ACU 1: Air condition unit ACU 2: Alternator control unit [2]
High-temperature, high-pressure air cycle machine (ACM) packs can be replaced with low temperature, low-pressure packs to increase efficiency. At cruise altitude, where most aircraft spend the majority of their time and burn the majority of their fuel, the ACM packs can be bypassed entirely, saving even more energy.
A foil bearing, also known as a foil-air bearing, is a type of air bearing. A shaft is supported by a compliant, spring-loaded foil journal lining. Once the shaft is spinning fast enough, the working fluid (usually air) pushes the foil away from the shaft so that no contact occurs. The shaft and foil are separated by the air's high pressure ...
In 1948 the newly created United States Air Force took delivery of several larger 30" (0.76 m) designs and fitted them to the wingtips of a P-80 Shooting Star, which became the first manned aircraft to be powered by ramjets alone. An even larger 48" (1.22 m) design was built as a booster for a new interceptor design, but not put into production.
The Wright R-3350 Duplex-Cyclone is an American twin-row, supercharged, air-cooled, radial aircraft engine with 18 cylinders displacing nearly 3,350 cubic inches (54.9 L). Power ranged from 2,200 to 3,700 hp (1,640 to 2,760 kW), depending on model.
First produced by the Aircraft Engine Corporation of Oakland, California, new interests acquired the California company and the Comet Engine Corporation was formed under the sponsorship of Air Investors Inc., the Crocker First Company of San Francisco and the Gisholt Machine Company.
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