Date: 01 Aug 97 04:04:17 From: email@example.com (DQC) Organization: AOL http://www.aol.com References: 1
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> When the 5th engine is installed, it is inactive - it gets no fuel. To >prevent the engine from windmilling, which is a very high drag state, a >special inlet is fitted to change the inlet area and hence, massflow. I've installed several "5th pods." Actually, the fan blades are all removed and a large mushroom shaped dome is attached which "locks" the (bladeless) fan hub and thereby the low compressor/turbine module preventing rotation, and fairs the now blunted inlet. In addition, a cone shaped "plug" is attached to the exhaust "tailpipe" and attached via a smaller cap at the end of the "tailplug." Together these fixtures close off the inlet to the "core" (or "hot-stream") section of the engine, close the exhaust nozzle and provide the best anti-drag fairing for the installation. Joe W, TWA Ret.