In this film, the features and correct use of the type 14 pilot's mask and dilator demand oxygen regulator are detailed. The diaphragm of the regulator responds to the pilot's breathing. This action trips the oxygen demand valve and admits oxygen as the pilot's lungs demand it. When the regulator is set at normal, it admits air from the cockpit to dilute the oxygen and increase the oxygen endurance. The regulator switch is kept at the normal or on setting for most flight conditions. The internal mechanism of the regulator restricts the inflow of cockpit air as the plane gains altitude. At about 30,000 feet, no cockpit air is admitted, and the pilot breathes the pure oxygen that is necessary to sustain life atthat altitude. An emergency valve can be used to overide the system and supply pure oxygen on demand. A pilot is shown making a thorough pre-flight oxygen system check. A mechanic checks the system for leaks. The pilot takes off and illustrates the proper use of the oxygen system in flight. Over footage of pilots in full gear in flight, several special situations are discussed in which the oxygen system must be used. These include: when carbon monoxide leaks into the cockpit; when the pilot is suffering from oxygen deprivation; and during night flights to improve vision. An aviation equipment and survival officer lectures to a group of pilots on the features and correct use and fitting of the type 14 mask. Shots include: animation to show how the oxygen regulator works and to illustrate what happens to flight time with proper and improper use of the dilutor; planes in flight and taking off from and landing on carrier decks.
The National Library of Medicine believes this item to be in the public domain. (More information)
Black and white
Received: Apr. 1, 1959 as a donation from the U.S. Navy.