Jetrader - September/October 2008 - 32

Bristol Hercules engine at The Museum of Flight, East Fortune, Scotland and the jamming of the British radar the RN was caught napping. Six Swordﬁshes were dispatched from RAF Manston, Kent. In Brighton I saw them pass very low overhead with their torpedoes slung underneath and disappear in the rain out to sea. All were shot down. Getting Back on Target Roy Feddon was chief engineer of the Cosmos Engineering Company, which was bought out by Bristol in 1920 together with its promising Jupiter radial engine. Feddon eventually became chief engineer (and later “Sir” Roy). He had been RIGHT CARGO SYSTEM. RIGHT HANDLING. We're on it ™ 364853 Goodrich 1/4v Goodrich has developed a new advanced cargo handling system with retrofit market 4C compatibility. Our customers experience: Goodrich Cargo Systems • Quicker turns • Faster loading • Extended range • Lower life cycle costs • Lower system weight for more payload and revenue working on the development of the sleeve valve concept since 1926 and was encouraged by Harry Ricardo’s tests that showed the sleeve-valve engine had lower speciﬁc fuel consumption and weight, as well as a superior volumetric efﬁciency than an identical poppet valve model. Ricardo has an engine development company at Shoreham on England’s South coast. If you happen to have owned a Honda, you should know that the engine has his patented stratiﬁed-combustion chamber design. That’s why it has two inlet valves but only one exhaust valve. Brieﬂy, the sleeve valve is the cylinder liner with four specially shaped holes in the wall, two inlets and two exhausts. The liner reciprocates vertically, driven by a mini-crank running at half engine speed (remember it’s a four-stroke cycle). It also performs little horizontal rotational movements simultaneously, as the rotating crank pin wiggles it back and forth, as well as up and down. By this geometry, the holes line up with the intake manifold on the induction stroke and the exhaust after the power stroke. Of course during the compression and power strokes the holes do not line up with anything except near the end of the stroke. The best-known sleeve valve engine was the Bristol Hercules with 14 cylinders in two rows with a rated power range of 1,445-1,735hp for the fourengine bombers and twin-engine Beauﬁghter. In all it powered 17 different aircraft types including four commercial aircraft. A total of 57,400 Hercules engines were built. In October 1942, in the middle of the war and development of the 2,520hp 18-cylinder two-row Centaurus, the Bristol board of directors ﬁred Roy Fedden, who had been the program manager for every Bristol engine. Animosity between the parties had been growing for years to the point that cooperation over funding new programs was non-existent. REFERENCES: • Graham White: “Allied Aircraft Piston Engines of WWII”; SAE, 1995 • Graham White: “R-2800, Pratt & Whitney’s Dependable Masterpiece,” SAE, 2001 • Sir Archibald Russell: “A Span of Wings,” Airlife Publishing Ltd (UK), 1992 • Sir Stanley Hooker: “Not Much of an Engineer”; SAE, Airlife Publishing Ltd, 1984 • www.bristolaero.112 com/exengines • www.aviationartprints.com/new_page_2.htm • www.en.wikipedia.org/wiki/Frederick_Brant_ Rentschler • www.history.nasa.gov/SP-4219/Chapter1.html • Plus multiple www pages for cross checks p 32 Looking for a system to handle your needs? We're on it. right attitude/right approach/right alongside www.goodrich.com 32 The ofﬁcial publication of the International Society of Transport Aircraft Trading 364853_goodrich.indd 1 1/21/08 10:44:03 AM

http://www.goodrich.com http://www.bristolaero.112.com/exengines http://www.aviationartprints.com/new_page_2.htm http://www.en.wikipedia.org/wiki/Frederick_Brant_Rentschler http://www.en.wikipedia.org/wiki/Frederick_Brant_Rentschler http://www.history.nasa.gov/SP-4219/Chapter1.html

Jetrader - September/October 2008

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