MIL-V-43511C, MILITARY SPECIFICATION: VISORS, FLYER'S HELMET, POLYCARBONATE (16 JUL 1990) [S/S BY MIL-DTL-43511D]

MIL-V-43511C, MILITARY SPECIFICATION: VISORS, FLYER'S HELMET, POLYCARBONATE (16 JUL 1990) [S/S BY MIL-DTL-43511D]., This specification covers general and performance requirements for curved polycarbonate flyer's helmet visors worn by aircrew personnel.