Originally it was the Mitsubishi MU-300 Diamond which was developed after the MU-2. 89 MU-300 Diamond I's were built then 11 MU-300 Diamond II's before the type was acquired by Beechcraft and re-designated as the Beechjet 400 and later 400A models. The Military version (JPATS) is the T-1 Jayhawk. The current upgraded version is the Hawker 400XPR.
Spent alot of time around these since the Diamond Jet days to the current NEXTANT 400 XTi. A total pain to fuel with two overwing wing tanks and the hated trunk tank. Cool thing about the USAF version is that it is single-point refueled which makes it so much easier. Mike
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