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With the AETC system, the power-valve systems are normally partially closed at low RPM; when closed, it enables the engine to make more power. Up to a certain point, however, power drops off as the engine is unable to expel enough gases out of the exhaust. When the power-valve is opened, it allows more gases to flow out of the exhaust port.
The Van's RV-12 is an American two-seat, single-engine, low-wing homebuilt airplane eligible for the U.S. E-LSA category, sold in kit form and as a complete ready-to-fly aircraft by Van's Aircraft of Aurora, Oregon. [4] [5] The first RV-12, built by Richard VanGrunsven, at Oshkosh 2008. The RV-12 had its first flight on November 9, 2006. [3]
The Casablanca-class escort carrier, the most prolific aircraft carrier design in history, used two 5-cylinder Skinner Unaflow engines, but these were not steeple compounds. A non-compound Skinner Uniflow remained in service until 2013 in the Great Lakes cement carrier SS St. Marys Challenger, installed when the vessel was re-powered in 1950 ...
In the simple case, this can be a relatively simple task as in the internal combustion engine in which the valves always open and close at the same points. This is not the ideal arrangement for a steam engine, though, because greatest power is achieved by keeping the inlet valve open throughout the power stroke (thus having full boiler pressure, minus transmission losses, against the piston ...
The Van's RV-9 and RV-9A are American two-seat, single-engine, low-wing homebuilt airplanes sold in kit form by Van's Aircraft of Aurora, Oregon. The RV-9 is the tail-wheel equipped version while the RV-9A features a nose-wheel. [4] [5] [6] The RV-9 was built around a newly designed high aspect ratio wing, featuring a Roncz airfoil.
The RV-7 incorporated many changes resulting from the lessons learned in producing over 2,000 RV-6 kits. The RV-7 airframe will accept larger engines, including the Lycoming IO-390, up to 215 hp (160 kW). [8] The RV-7 also has increased wingspan and wing area over the RV-6, as well as more headroom, legroom and an increased useful load.
The Van's Aircraft RV-14 is an American aerobatic kit aircraft designed by Richard VanGrunsven and produced by Van's Aircraft. It was introduced at AirVenture in July 2012. [1] The aircraft is supplied as a kit for amateur construction. [3] [4] As of November 2022, 207 RV-14s have been completed and flown. [2]
A very steep coding, electronic design, and tuning curve prevented the system from gaining wider acceptance. [1] The designers then decided to simplify the EFI332 design, and focus on managing the fuel injectors (the EFI332 was also designed to control the spark plug ignition system if so desired). This was the basis for the first MegaSquirt ...