Originally Posted by
WHBM
Back to the Strat. It was a customer choice whether you had Hamilton Standard hydraulic propeller control units, or Curtiss electric ones. Some aircraft were later changed from one to the other, I seem to recall the Curtiss electric was the one that fell out of favour. Along with this were the choices of hollow or solid prop blades, again some changed these later. The aircraft had more than its fair share, for its limited production, of runaway props and shed blades.
The props on an R-4360 engine must have been transmitting the most power of any reciprocating engine built, and would have been up against the technology limits of the day. There's an R-4360 on display in the Udvar-Hazy museum at Washington Dulles, what a huge engine.
7 cylinders to a row, with 2 spark plugs to each cylinder. 4 rows of cylinders per engine. 4 engines. That's 224 spark plugs. Apparently there was some shock loading failure mode which required the changing of all an aircraft's spark plugs. An engineer of the era wrote of doing these multiple times, all on weekend overtime, and making enough to put down the deposit on a decent house.
Not only were there 224 plugs, i knew a ,mechanic who used to work on C-124's in the USAF and he said they used to change cylinders almost as often as plugs.