TopSkills - Managing Your Power eBook. Correct management of fuel mixture, propeller pitch, and cowl flaps makes your simulated flights more realistic. This supplement to my video of the same title presents relevant data in concise form for easy reference and use. Based on stock piston aircraft in Microsoft Flight Simulator X and Lockheed Prepar3D. Everything can be applied to similar aircraft and other simulators. Eleven PDF pages. From Bill Stack and TopSkills.