Investigation of the Acceleration and Jolt Histories During Escape from High Speed Aircraft
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Report Number: WADC TR 52-278
Author(s): Scherberg, Max G., Ferguson, Harry
Corporate Author(s): Flight Research Laboratory
Laboratory: Flight Research Laboratory
Date of Publication: 1952-10
Pages: 43
DoD Task:
Identifier: AD0005010
AD Number: 5010
Abstract:
It is shown that the maximum acceleration that a person may encounter at a given time after separation of his escape unit from a damaged, unrecoverable aircraft is dependent only on the velocity of the aircraft. Acceleration histories determined from flight tests indicate that these theoretical maximums are reasonable and practical at least in the subsonic case. Lt. Colonel J. P. Stapp of the Aero Medical Laboratory has reported (see paragraph 3) that high rate of acceleration onset during a fixed time produces injuries not found at lower onset rates. On the hypothesis that decay rates may be of comparable interest it is shown in this report that decay acceleration rates are functions of the initial acceleration and speed of the escape unit. The accelerations parallel to and normal to the spine of a person in a tumbling escape unit are calculated for an assumed hypothetical case. The effects of these alternately increasing and decreasing accelerations on the person may be described as a shaking phenomena which may be beneficial to the escaping person.
Author(s): Scherberg, Max G., Ferguson, Harry
Corporate Author(s): Flight Research Laboratory
Laboratory: Flight Research Laboratory
Date of Publication: 1952-10
Pages: 43
DoD Task:
Identifier: AD0005010
AD Number: 5010
Abstract:
It is shown that the maximum acceleration that a person may encounter at a given time after separation of his escape unit from a damaged, unrecoverable aircraft is dependent only on the velocity of the aircraft. Acceleration histories determined from flight tests indicate that these theoretical maximums are reasonable and practical at least in the subsonic case. Lt. Colonel J. P. Stapp of the Aero Medical Laboratory has reported (see paragraph 3) that high rate of acceleration onset during a fixed time produces injuries not found at lower onset rates. On the hypothesis that decay rates may be of comparable interest it is shown in this report that decay acceleration rates are functions of the initial acceleration and speed of the escape unit. The accelerations parallel to and normal to the spine of a person in a tumbling escape unit are calculated for an assumed hypothetical case. The effects of these alternately increasing and decreasing accelerations on the person may be described as a shaking phenomena which may be beneficial to the escaping person.