S.E.5a Tripple build
Viper, Hisso and night-fighter is one build

The idea is to build 3 different SE5s:
1) "normal" 2 bladed propeller (later version) [Royal Air Force No. 60 Sqn. F5687/G (Lt. J.A. Roth) November 1918]
2) four bladed propeller (early version) [Royal Flying Corps No. 56 Sqn. RFC B4863/G (Capt. J.T.B. McCudden) September 1917]
3) Night Fighter [Royal Air Force No. 143 Sqn. C1805/2 (Lt. W.R. Oulton) May 1918]