Abstract
This paper tells of some of the installation problems of air-cooled radial engines, and the author points out some improvements that are desirable. Engine exhaust and cowling systems are described, and the purposes of carburetor air heaters and cleaners are given. Variation of the viscosity of oil with temperature, together with its low heat conductivity, causes many difficulties in the lubricating system. Oil foaming is another source of concern to designers. An effective method of preventing this is to discharge the oil on a plate sloping into the oil volume and allow it to run down the sides into the oil tank.
There are many types of fuel systems, and the author gives some general considerations that should be followed in installation. To provide for inverted flight requires special arrangements to give satisfactory results.
