posted on Jan, 30 2013 @ 03:18 PM
The hush house can accommodate engines by themselves or installed in the aircraft.
If the test article is a classified aircraft, then testing its engine indoors provides additional security by hiding the aircraft from uncleared
personnel. Also, there is instrumentation and a monitoring station built into the hush house to collect data, which probably makes this technique
preferable to simply running the engine inside a hangar with doors open on both ends. Not all hangars have that feature. Also, they lack the extra
instrumentation and may contain equipment or hazardous materials that would have to be removed in order to do such a test.