BBC Weather map filled the entire screen, with an off-screen announcer reading the next day's weather. On 11 January 1954, the first in-vision weather forecast was broadcast, presented by George Cowling. In an in-vision the narrator stands in front of the map. At that point, the maps were drawn by hand in the London Weather Centre, before being couriered across London. The forecasts were presented by the same person who had composed them, and had relatively low accuracy. The London Weather Centre which opened in 1959 took the responsibility for the national radio weather broadcasts. Radio forecasters were chosen by a BBC
NACA cowling the engine could create some thrust by exiting at high speed, in practice this required a cowling designed and shaped to achieve the high speed exit of air required (which the NACA cowling was not), and in any case, at 1930s airspeeds, the effect is negligible. The cowling constitutes a symmetric, circular airfoil, in contrast to the planar airfoil of wings. It directs cool air to flow through the engine where it is routed across the engine's hottest parts, that is, the cylinders and heads. Furthermore, turbulence after the air passes the free-standing cylinders is greatly reduced. The sum of