On Sat, 19 Oct 2002, Angus Gordon wrote: > This is nonsense. There is no one universal mandated TBO for aircraft engines. > Here is an example of the recommended TBO for Lycoming engines - > > http://home.earthlink.net/~tbo/SI1009.pdf > > Many of the turbocharged models (those with a T in the prefix) > have recommended TBO's that are as long or longer than some normally > aspirated engines. Those recommendations are also just that -- recommendations, though most people follow them. They do not carry the force of law. Turbine engines tend to have some parts that *do* have mandated lifespans after which replacement is required. This is also often true of helicopter rotor blades. What I have heard is that turbocharged aircraft piston engines are considerably less forgiving than normally-aspirated ones. They require a bit more skill and attention to operate. (Many have manually-controlled wastegates, for example, and the fuel mixture (also manually controlled) is a bit more critical than in NA engines.) A ham-fisted pilot can destroy a turbocharged engine in relatively few hours. It takes someone with skill to get the engine to last until its TBO. _ _ __ _ _ _| | | | David M. Brodbeck (N8SRE) Ypsilanti, MI / _` | | | | | | +----------------------------------------------------- | (_| | |_| | | | @ cyberspace.org \__, |\__,_|_|_| "More and more of our imports come from overseas." |___/ -- President George W. Bush |
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