P flyer\'s helmet.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18

MIL-DTL-87174A(USAF)

4.5.8 Impact protection test. The helmet shell shall be mounted on a rigid headform (see 6.7) and

impact tests shall be performed in accordance with ANSI Z90.1 by the rigid anvil method using the

hemispherical impactor, and the following exceptions: the helmet shall be subjected to single

impacts only at the front, back, crown and each side location. The helmet�headform off�set

distance shall be measured at each impact site and the weight of the headform drop system obtained

prior to test. Based an the system drop weight, the height of drop shall be determined to deliver 35

foot�pounds impact energy. The acceleration recorded shall not exceed 150g for more than 6

milliseconds, 200g for 3 milliseconds, or 400g.

4.5.9 Windblast protection. The helmet assembly shall be mounted on a rigid headform (see 6.7)

with the appropriate oxygen mask in place and the lightweight visor assembly in the operating

(down) position. The headform shall then be secured in the test platform and exposed to windblast

velocity of 450 � 20 knots at the attitudes listed below. Separate helmet assemblies may be utilized

for each of these attitudes:

Head on

45� yaw to the right

45� yaw to the left

30� pitch aft

The helmet assembly shall not loosen or tear away from the form and shall not break.

4.5.10 Visor optical characteristics. The visor lens shall be inspected and tested in accordance with

MIL�V�43511.

4.5.11 Coating abrasion resistance. The coating on the visor lens shall be inspected and tested in

accordance with MIL�C�83409.

4.5.12 Weight. The complete helmet assembly, as defined in 3.8, shall be weighed. Weight of the

helmet shall be determined in increments of 0.01 oz. minimum.

PACKAGING

5.1

Packaging. For acquisition purposes, the packaging requirements shall be as specified in

the contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD

personnel, these personnel need to contact the responsible packaging activity to ascertain requisite

packaging requirements. Packaging requirements are maintained by the Inventory Control Point's

packaging activity within the Military Department or Defense Agency, or within the Military

Department's System Command. Packaging data retrieval is available from the managing Military

Department's or Defense Agency's automated packaging files, CD�ROM products, or by

contacting the responsible packaging activity.