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#1
March 31st 04, 08:38 AM
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"Hilton" wrote in message
ink.net... Some engines seem to shake a whole lot less on shutdown when set to 1000 RPM. Then the instruction should be to *set* engine power 1000 RPM before shutting down. Telling a pilot to run the engine at 1000 RPM before shutting down is ambiguous and could (probably will) lead to the pilot simply reducing RPM before pulling the mixture, after running the engine at 1000 RPM. Especially if the instruction is to run the engine at 1000 RPM "for a few moments" (which would clearly imply to reduce RPM again before actually shutting the engine down). Pete 
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#2
March 31st 04, 08:52 AM
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Peter Duniho wrote:
Hilton wrote: Some engines seem to shake a whole lot less on shutdown when set to 1000 RPM. Then the instruction should be to *set* engine power 1000 RPM before shutting down. Telling a pilot to run the engine at 1000 RPM before shutting down is ambiguous and could (probably will) lead to the pilot simply reducing RPM before pulling the mixture, after running the engine at 1000 RPM. Especially if the instruction is to run the engine at 1000 RPM "for a few moments" (which would clearly imply to reduce RPM again before actually shutting the engine down). Quoting the full sentence: "...an instructor says that it is best to idle the engine at 1,000 RPM for a few moments before Mixtu Idle Cut-Off at that RPM to shut down." So the CFI wanted Lisa to shutdown "...at that RPM" and this does not "...clearly imply to reduce RPM". Hope that clarifies it. Hilton Hilton
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#3
March 31st 04, 06:49 PM
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"Hilton" wrote in message
ink.net... [...] So the CFI wanted Lisa to shutdown "...at that RPM" and this does not "...clearly imply to reduce RPM". It does to me. "A few moments before" could even be reasonably interpreted as "run the engine at 1000 RPM for any period of time, but make sure there are a few moments between reducing engine speed and shutdown". Hope that clarifies it. I think you're pretty foolish to think that the original instruction was not ambiguous. The fact that we're even having this discussion proves that it is. Pete
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