引用・参考資料等 https://www.quora.com/How-did-aircrew-quickly-eject-from-a-Lancaster-bomberhttps://www.quora.com/Did-bomber-crews-during-WWII-all-have-parachutes-in-the-case-of-a-mid-air-emergency-If-so-what-was-the-protocol-for-exiting-the-planehttps://asn.flightsafety.org/wikibase/48342
http://www.nicovideo.jp/watch/sm44152667
