There is a nice write-up in the Feb. issue of the AOPA Pilot magazine. It's all about the restoration of Doc, a lot about the people involved over the years. One gal in her 90's actually did some of the original riveting back when it was first built. She was 20 at the time and riveted the nose. Now, 72 yrs. later only a half dozen rivets were missing. It took 15 yrs. and approx. 300,000 volunteer hours. The project director made a rule: If you're older than the airplane, you can't get on top of the wing. He said that only left a couple of guys to do work topside.
As to fuel, it burns 400 to 500 gallons/hour for takeoff and climb, 400 in cruise. It can go 300 mph but they have restricted that. The engine rpm are limited to 2400 to prevent the blade tips from going supersonic. Glad I don't have to pay the fuel bill.
