"flying helmet" meaning in English

{
  "forms": [
    {
      "form": "flying helmets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flying helmet (plural flying helmets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1980, Bill Oddie, Bill Oddie's Little Black Bird Book, page 61",
          "text": "This is another area in which it's hard to tell the dude from the twitcher, as ratting caps and deerstalkers, flying helmets and even toppers are considered acceptably eccentric.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A leather head covering with earflaps used by early aviators."
      ],
      "id": "en-flying_helmet-en-noun-delU7Bez",
      "links": [
        [
          "leather",
          "leather"
        ],
        [
          "earflap",
          "earflap"
        ],
        [
          "aviator",
          "aviator"
        ]
      ]
    }
  ],
  "word": "flying helmet"
}

{
  "forms": [
    {
      "form": "flying helmets",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flying helmet (plural flying helmets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1980, Bill Oddie, Bill Oddie's Little Black Bird Book, page 61",
          "text": "This is another area in which it's hard to tell the dude from the twitcher, as ratting caps and deerstalkers, flying helmets and even toppers are considered acceptably eccentric.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A leather head covering with earflaps used by early aviators."
      ],
      "links": [
        [
          "leather",
          "leather"
        ],
        [
          "earflap",
          "earflap"
        ],
        [
          "aviator",
          "aviator"
        ]
      ]
    }
  ],
  "word": "flying helmet"
}