|XB-81 Tau Accelerator|
|Type||Experimental, handheld tau particle accelerator|
|Place of origin||Harbitros|
|In service||2081 to 2111|
|Used by||Harbian Eclipse Agency|
|Designed||2077 to 2111|
|Number Built||3 (by 2111)|
In 2083, the tau cannon was tested during Operation Black Deluge and was used against Eor Stragsden, Glade Sunderval, and Brett Colgreave. However, it was destroyed from being in its own proximity when its beam struck Colgreave. After its destruction and successful test run, Project Prismbeam and Casanovus Incorporated made plans to create more.
A second one, with several minor improvements, was finished in 2085. After testing the second one, a third one was built in 2096. However, at the same time, a successive model was being designed by Project Prismbeam -- the XB-111 Tau Accelerator. It was officially completed in 2111, and a dozen original models were produced and circulated through the Harbian Eclipse Agency and Fuerzas Armadas Larusianas.