OPTEMPO

I've been flying for the Germans in May of 1918 in Red Baron 3D recently and I have a historical question. I have had three missions per day for 3 weeks straight, one in the morning, one mid-day and one in late afternoon. Is this optempo historically accurate? If so then the WWI pilot must have been one tired, stressed out puppy. I'm fatigued and I'm sitting in a warm room, drinking coffee and eating doughnuts between missions.

v/r
Paul