|
The Zoche aero-diesels are a trio of German prototype Diesel radial aero-engines intended for light aircraft. The Zoche〔http://www.zoche.de〕 ZO range comprises three radial engines, namely: the ZO 01A, a "cross-4"; the ZO 02A, a twin-row "cross-8"; and the ZO 03A, a V-twin.〔 Power outputs are , and (respectively). The Zoche engine gestation period has lasted some 20 years; and whether or when production may start is unknown. ==Design and development== The founder of the project is Michael Zoche, who claims that the ZO engines will have the following advantages: they will be lightweight, compact and perfectly smooth; low fuel consumption; high power-to-weight ratio; the lubrication system will allow aerobatics; diesel fuel injection, so no carburetor icing; direct-driven generator, so no drive belts; good reliability through a low part count and absence of poppet valves; pneumatic starting obviates both electric starter motor and heavy starter battery; complete absence of rubber hoses; cheaper parts through modularity; reduced fire risk compared to avgas; good power output, even at altitudes up to 9,000 feet (3,000 m).〔http://www.zoche.de/zoche_brochure.pdf〕 The engines will also have the "classic" appearance that is suitable for some aircraft types. The AOPA website explains the "cross-4" ZO 01A as follows: "The radial design was chosen for its ability to be effectively air-cooled and 100% balanced at all rpm with a simple counterweight system. All four connecting rods are attached to a single crankshaft throw. This prevents any crankshaft twisting, which is hard to balance out in opposed-configuration engines. Zoche engines use a pneumatic starting system that does away with the need for a heavy-duty starter and battery system".〔http://www.aopa.org/pilot/features/future0008.html〕 Zoche ZO engines are modular and are all direct-drive, air-cooled, radial two-stroke diesels with up to four cylinders per row. They feature two-stage charging (turbocharger and supercharger), direct fuel-injection and intercooling. Propeller rotation is clockwise (viewed from the cockpit). Engine weights (below) include: starter-generator, hydraulic propeller-governor, turbocharger and supercharger, and oil- and fuel-filters. Engine mountings are attached to the cylinder heads. Engines are to be certified to JAR-E and FAR 33, and a TBO of 2,000 hours is anticipated. A Zoche engine has run effectively in wind tunnel tests,〔http://www.zoche.de/Zoche_video.html〕 but Zoche seem barely any closer to production than they were a decade ago. Experimental engine manufacturers seem to experience difficulties in proceeding beyond the prototype stage. The Lambert Mission 212,〔http://www.lambert-aircraft.com/eng/indexEN.htm〕 a kit-build 4-seat aircraft from Belgium that is nearing completion of pre-production testing, was initially designed around the Zoche ZO1A motor; but, with the non-appearance of the Zoche, Lambert have been obliged to select other engines, the DeltaHawk® DH200A4 (or DH180A4), or the XP-360 engine.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zoche aero-diesel」の詳細全文を読む スポンサード リンク
|