引用・参考資料等<br><a href="https://apps.dtic.mil/sti/tr/pdf/ADA382900.pdf" target="_blank" rel="noopener nofollow">https://apps.dtic.mil/sti/tr/pdf/ADA382900.pdf</a><br><a href="https://www.quora.com/Why-do-military-helicopters-not-have-doors" target="_blank" rel="noopener nofollow">https://www.quora.com/Why-do-military-helicopters-not-have-doors</a><br />youtubeの方<br><a href="https://www.youtube.com/c/AdmiralyukkurimilitarybyRetoRooRaa/videos" target="_blank" rel="noopener nofollow">https://www.youtube.com/c/AdmiralyukkurimilitarybyRetoRooRaa/videos</a><br>ボクのツイッター<br><a href="https://twitter.com/retoro_V" target="_blank" rel="noopener nofollow">https://twitter.com/retoro_V</a><br>キャラデザイン<br>CaraCorn様