Checking the panels of the DC3 and Ford TriMotor, both have only one rev counter.Even making allowance for the age of the aircraft and the relatively primitive instrumentation then available did they really fly around in those days with only one gauge to show the RPM? If so which of the two engines on the DC3 (or three on the TriMotor) is the rev counter showing the RPM of?

Simple, for the Ford TriMotor, open with SHIFT-6 an additional window with the gauges for the other engines. When you have tooltips enabled, you would see with mouse over "main" rpm: engine 2.Look for the DC3 in views|panel for similair option.Jozef http://www.dse.nl/~joker32/pictures/signature.jpg

JozefThanks for the clarification. I tried looking for the answer in the Learning Center but couldn't find an explanation.