Catapult Launch Fatigue Investigation of the Model S-2E Airplane.
NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT
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A laboratory fatigue investigation was performed on an S-2E fuselage with reinforced catapult keel beam and holdback carry through structure to determine if it could sustain the loads associated with 3,000 catapult launches. The bulkhead at fuselage station 206 failed after 5,690 test cycles of the catapult start of run condition. Using a test scatter factor of 2, this is equivalent to 2,845 service catapult launches. The test article experienced 419 service catapult launches prior to reinforcement, which when added to the test results provides for a service catapult launch life in excess of 3,000 launches. The holdback release condition test was discontinued after 10,000 test cycles, with no failures. Again, using a test scatter factor of 2, this is equivalent to 5,000 service catapult launches. Author
- Patrol and Reconnaissance Aircraft