ORIGINAL: abufletcher
Given that many of the WWI era fighters had flight durations of about 1 1/2 hours, I don't think falling asleep at the wheel in an open cockpit was a major problem. Passing out from engine fumes mabye...
However, some of the bomber and observation types did make flights of over 4 hours and in the case of some aircraft which the pilot had to really "fly" all the time this could truly be nerve-wracking and exhausting.
Actually, I find it nerve-wracking and exhausting just to fly my RC models for 5 minutes so maybe an hour and a half isn't so short a time!
Anyway, we've sort of drifted away from the original thread here. I'm looking forward to seeing some in-flight photos of people's SR Eindeckers.