Ditching Tests with a 1/16-Size Dynamic Model of the Army B-24 Airplane in Langley Tank No. 2 and on an Outdoor Catapult
Abstract
Tests were conducted to determine the best way to ditch the Army B-24 airplane in calm and rough water and to determine its probable ditching performance. A dynamically similar model of the B-24 airplane was ditched in calm water in tank no. 2 and in calm and rough water from an outdoor catapult. Its behavior was ascertained by making visual observations, by recording maximum declarations, and by taking motion-picture records of the landings. Conclusions based on the tests are that a water landing with a B-24 airplane should be made at as low a vertical and horizontal velocity as possible. A medium (4 or 5 deg) attitude ditching with flaps down appears to be slightly preferable, and if possible, the airplane should be ditched parallel to the waves. Decelerations of about 5g are to be expected. A hydroflap was found to be a very effective ditching aid for preventing dives. Generally speaking, the tests indicate that the B-24 airplane with the extensive damage to the bottom that will probably occur in a ditching is an unsafe airplane. The model settled into the water up to the wings very soon after impact. There was a tendency to dive in certain conditions of seaway when damage caused a "nosing-in" moment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1945
- Accession Number
- ADB815061
Entities
People
- Lloyd J. Fisher
- Margaret F. Steiner
Organizations
- National Advisory Committee for Aeronautics