BREAKING-STRENGTH AND ENDURANCE TESTS OF ALUMINUM TURNBUCKLES FOR AIRCRAFT.

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Abstract:

Breaking-strength and endurance tests were run to make possible a partial evaluation of the strength of turnbuckle bodies fabricated from 2024T6 aluminum alloy. Aircraft control cable turnbuckles and fittings were exposed to extremes of temperature, salt water spray, buffeting, and low-amplitude high-frequency vibration. Failures in the aluminum bodies occurred at the transverse hole drilled through the middle of the body. When the aluminum body is modified so that the opening area is 0.057 inch, failures at the transverse hole can be eliminated. Tests of brass and aluminum bodies showed that the ratio of average tensile strength to weight of aluminum bodies was 61 percent better than for the brass bodies. When aluminum barrels were used instead of brass barrels, a saving of approximately 7 pounds could be realized for bodies used with a cargo or bomber type aircraft. Author

Author(s):
Smith, Perry L.
Author Organization(s):
SYSTEMS ENGINEERING GROUP WRIGHT-PATTERSON AFB OHIO
Descriptive Note:
Technical documentary rept. July-Nov 63,
Annotation:
Breaking-strength and endurance tests of aluminum turnbuckles for cargo and bomber aircraft.
Pagination:
0024

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
SEG-TDR64 2
Monitor Series:
TDR64 2
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application
Communities of Interest:
Air Platforms
Descriptor(s):
*POSITIONING DEVICES(MACHINERY), *ALUMINUM ALLOYS, AIRCRAFT CONTROL CABLES, POSITIONING DEVICES(MACHINERY), TENSILE PROPERTIES, FAILURE(MECHANICS), FATIGUE(MECHANICS), BRASS, TEMPERATURE, BUFFETING, VIBRATION, SODIUM COMPOUNDS, CHLORIDES, BOMBER AIRCRAFT, TRANSPORT AIRCRAFT
Report Date:
1964 Mar 01