scope:

This specification covers requirements for the procurement of tension bars/release elements (TB/RE) of the types and part numbers shown in 1.2. Frangible elements that are used to launch nose gear launch aircraft are referred to as release elements.

The tension bar/release element (TB/RE) shall be classified by type as follows in Table I: TABLE I. Type Classification

TYPE TYPE OF NAEC BREAKING MATERIAL OR PART STRENGTH PROCESS NUMBER POUNDS NEWTONS ------------------------------------------------------------------------ I Hollow Bar 502822-4 28,500 ± 1500 126,774 ± 6,672 II Solid Bar 513436-1 36,200 ± 1500 161,025 ± 6,672 413745-1 38,000 ± 1500 169,032 ± 6,672 417599-1 53,000 ± 1500 235,755 ± 6,672 506409-1 63,000 ± 1890 280,737 ± 8,407 508713-1 63,000 ± 1890 280,237 ± 8,407 III Forging 517891-1 46,453 ± 1353 206,632 ± 6,018

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be address to: NAVAL AIR ENGINEERING CENTER, SYSTEMS ENGINEERING AND STANDARDIZATION DEPARTMENT (CODE 93), Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (DP Form 1426) appearing at the end of this document or by letter.

intended Use:

This specification covers TB/RE that are intended to be used in military aircraft launchings. The TB/RE are designed to break at a specific tension load to release an aircraft from a catapult.