Quote:
A B-17 will easily burn 200 gallons of fuel per hour, plus about 10 gallons of oil per hour. Consumables and wear items cost an estimated $3,000 per flight hour. For each hour a Flying Fortress spends in the air, ten are spent on the ground in maintenance. An engine overhaul can cost $40,000, and FAA required wing-spar inspections and repairs will cost each Flying Fortress in excess of $100,000.
Yes, some of the work is done by volunteers - but much of it, especially the larger work, has to be performed by licensed mechanics, often at a maintenance/repair shop, that needs to be paid for. Never mind the cost of replacement parts - when you can find them.