Working on completion of the model so it can be flown ingame. Thinking about damage modeling. The model will have two fuel tanks, one oil tank/two oil coolers, and a hydraulic pack that can be damaged by enemy bullets. That got me thinking about structural damage, and the unique nature of the 1940 desert mod.
It would be unrealistic to continue using the standard FE concept of battle damage causing portions of wooden wings or fuselage to break off when hit by large numbers of bullets. The stars of the show may be biplanes, but - unlike WW1 aircraft - they all had metal structures which resisted rifle caliber bullets. While rifle caliber bullets fired by all of the combatants might strike fuel tanks, etc statistically most of the bullets would hit the metal structures. Rifle caliber bullets were largely ineffective against metal aircraft structures, which is why air forces transitioned to auto cannons that COULD destroy aircraft structures.
So....when hit by bullets, I'm thinking about just having the fabric skin peel off the wings, exposing the metal structure.
EDIT: Yes, I know that Japanese aircraft were highly vulnerable to machine gun fire, but there were two factors that made this situation unusual. Japanese aircraft had very light weight structures that were more easily damaged, and they were being hit by .50 cal bullets that were more powerful than "normal" machine gun bullets. Because the Browning .50 cal machine gun was unusually powerful, the US continued using it long after other countries had switched to auto canons.