Re: "crackle"

Date:         16 Sep 99 16:42:31 
From:         "Roy Maxwell" <>
Organization: AT&T WorldNet Services
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I think know the sound to which you refer.  It occurred only on the old pure
jet engines, not the current fan jets.  The CV-880 with the CJ-805 and the
DC-8-33 with JT4A engines, for example.  I remember hearing it only at
takeoff thrust, generally when performing a static thrust setting before
takeoff roll began.  I have never seen anything written on it.

Roy Maxwell