The New Type Aircraft Park where the newest models are dis-recall., is Great Britain's contribatior to the trans-Atlantic tests, to see wha land machines can do in comparison with flying-boats. The Albat: capable of carrying 22 passengers and with her smooth exterior and wide-spreading cantilever wings she a' beautiful sight. She was ne allowed to fly yesterday, but about in a tempting manner Sleev Valved Engine More than ten years ago the Bristol company set itself to solve the problem of a sleeve-valved engine in order to be ready for the increased power which it was foreseen that the future would demand. The advant ages of the sleeve-valve are great Valve maintenance and top overhaul are eliminated; fuel and oil consump Lion are exceptionally low, and the oil consumption actually diminishe as the engine is used; mechanical and exhaust noises are lessened; fire tish is less because the exhaust ring tem perature of a sleeve-valved engine are lower. Technically, the sleeve valved engine gives greater all-round thermal efficiency, while it is funda mentally simple and has few w king parts. Substantially higher cylinder compressions and supercharge ration may be employed with a given fne which means greater er and efficiency.
Many difficulties had to be ove come, through almost endless ex periment. But the reward is that the Bristol company are the only engineers now in the world to produce—successful—sleevevalvec engines, of which already announce three sizes.
More than 20,000 hours of single cylinder test running have gone t adoption by the Service of the highly efficient 100-octane fuel Military aircraft of great interest powered with the Hercules and other sleeve-valved engines, will British factories soon.
Text read from the printed page and cleaned; old type leaves the occasional error.