Founded in 1995, China Dongda Power Industry Co., Ltd. is one of the few piston engine manufacturer and distributor in China that has patents on the generator, motor, power supply, engine, alternator, diesel and gearmotor design, supply and sale. Our custom piston engines has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. Our 30 QC staff carefully performs inspections at every stage of production, from the time we receive raw materials to packaging. Noise, power, and stability are tested to ensure that our engines can endure 580 hours of constant use. We also can design and deliver OEM/ODM samples in one month.

The exposure, probability and severity of a wildlife strike, the aircraft and engine type, and the aircraft operating environment (See Chapter 2 and 6). Exposure and probability relate to the environment in which a particular type of aircraft operates. Since most wildlife strikes occur during takeoff and landing phases (see Chapter 7), aircraft that frequently engage in these activities are at higher risks. Operations in and out of airports where there is little or no wildlife-management activity—such as small community airports and major airports in developing nations—are also at higher risks of incurring bird and mammal strikes. Certification standards for particular engine and airframe components are important when determining the potential severity of damage. These standards vary with the type of aircraft and engine; critical forward-facing airframe components such as windshields, wing leading edges and empennages have different bird-impact design criteria.

Picture a tube or cylinder that holds a snugly fitting plug. The plug is free to move back and forth within this tube, pushed by pressure from hot gases. A rod is mounted to the moving plug; it connects to a crankshaft, causing this shaft to rotate rapidly. A propeller sits at the end of this shaft, spinning within the air. Here, in outline, is the piston engine, which powered all airplanes until the advent of jet engines.
Pistons in cylinders first saw use in steam engines. Scotland's James Watt crafted the first good ones during the 1770s. A century later, the German inventors Nicolaus Otto and Gottlieb Daimler introduced gasoline as the fuel, burned directly within the cylinders. Such motors powered the earliest automobiles. They were lighter and more mobile than steam engines, more reliable, and easier to start.

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