Here is one of the formations that were flying around for most of the afternoon. After each flight the pilots returned for a debriefing as none of the aircraft have radios so the formations must be controlled by hand signals. Surely this must be a unique sight worldwide.
Out the front of the hangar, you could have been forgiven for thinking you were at a German WW 1 aerodrome, with this line up of 5 German fighters. From the nearest Fokker Triplane they are Triplanes ZK-FOT, ZK-JOG, ZK-FOC and ZK-JOK, and Pfalz D III ZK-FLZ.