The Supermarine Nighthawk fighter was a prototype anti-Zeppelin fighter with quadraplane wings and a biplane tailplane.
https://s3-us-west-1.amazonaws.com/h...ht_fighter.jpg
https://s3-us-west-1.amazonaws.com/h...t_fighter1.jpg
https://s3-us-west-1.amazonaws.com/h...t_fighter2.jpg
Previously:
https://www.homemadetools.net/forum/...206#post149917
https://www.homemadetools.net/forum/...192#post149880
https://www.homemadetools.net/forum/...288#post134979
https://www.homemadetools.net/forum/...217#post134781
https://www.homemadetools.net/forum/...536#post136010
https://www.homemadetools.net/forum/...389#post161907