Message posted by Peter Merlin on January 20, 2010 at 15:23:22 PST:

The call sign of the NT-43A (USAF serial no. 73-1155) is actually RAT 55. It is short for RAdar Testbed plus the last two digits of the serial number. The crew wears a patch with a rat on it.

In Reply to: NT-43A 73-1155 posted by Ed Winchester on January 20, 2010 at 10:21:39 PST:

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