by waaytoomuchintothis » Sun Jan 12, 2014 2:59 pm
Nooooo! I have many completely pointless talents, and one of them is an affinity with old engines, especially aircraft. I never have gotten my hands (Whitworth wrenches actually), on a Tiger Moth or Stamp. I have lots of experience with its child, the Chipmunk. A friend in Louisville has an early model, greenhouse canopy and all, and we went through that airplane like we were rebuilding it. I loved that upside down Gypsy engine, which was common to your Tiger Moth. There were some odd things about this particular airplane, too. The log book shows that Prince Charles solo'ed in it, and the engine wasn't built by de Havilland. It was built by Rolls-Royce, and had a small brass plaque on the crankcase casting making note of it. I never saw another like it and I have no idea why it was farmed out to Rolls, but apparently it was. The thing about those engines was oil consumption. Other inverted engines had the valve gear in a position that prevented it, but the Gypsy valve train was submerged, more or less. I was told that the more modern versions of the engine solved the problem, but I really don't see how.
I have done quite a bit of flying in a P-51 Mustang, again, Rolls-Royce Merlin engine and my Whitworth and English Standard wrenches got me the chance to play. The deal I had with the owner was that when I set the valves, I had to fly with him to the practice area, where he would joyfully drive me nuts doing aerobatics (if he was going to die, I would, too, so I'd better get it right). The enormous radio and a spare fuel tank that were behind the pilot had been removed, and there was a tiny space with a jump seat left there. We opened the canopy as far as it would go, and I could slip into the seat by crawling backwards into it. I drove a Suburban full of tools and parts to Oshkosh while he flew, and we had a ball with the other warbirds and antiques. I learned a lot about the Merlin, there, too- an amazing engine.