New Axis Aircraft
In Germany, tests are being completed on a new torpedo seaplane built by Blohm and Voss. With three engines in the fuselage it appears to be or novel design, though no further data are available now. Blohm and Voss also built the asymmetric plane recently seen in news pictures.
Asymmetrical Aircraft Dr Vogt, designer of the asymmetrical BV-141, was ordered to provide exceptional visibility for military operations. A study of the thrust and slipstream and their reactions, led to the conclusion that the asymmetry should be arranged in such a way that thrust and slipstream canceled each other. The airscrew, situated on the left, turns the plane to the right, while the slipstream, striking the fin from the left, turns the plane to the left. In tests it was found that the swing met when changing from level to climbing flight, which can be very strong in single-engined aircraft, was rather moderate. The torque is canceled out by trimming the ailerons, while the right tailplane was eliminated solely to improve the field of fire.
New German Radial The BMW-801A engine, used in several German planes, including the FW-190 and the Do-217E, has aroused great interest in British engineering circles. It is a two-row 14-cylinder radial engine with a volume of 42 litres (2563 cu in), giving 1,580 hp for takeoff and 1,460 hp at the critical altitude of 16,300 ft. Special features studied on planes shot down over England are the cooling and cowling. The twelve bladed cooling fan mounted directly behind the airscrew runs at 3.14 times shaft speed. It gives adequate cooling at high rpm and low forward speeds and also serves a low-drag oil cooler mounted immediately behind it. A controllable slot at the rear of the cowling provides space for the exit air without disturbing the airflow or adding anything to the drag.
These news clips were excerpted from the "Aviation Abroad" column in the September, 1942, issue of Aviation magazine, vol 41, no 9, pp 258-259.