It's usually hard to find out exactly what weapons systems these contracts are destined for, but a contract dated Dec. 20, 2010, for $5,564, is for fans that (according to WebFlis) are specifically for the Aegis Weapons System, a crucial part of the destabilizing and wasteful "Star Wars" Ballistic Missile Defense. Rotron seems to be a regular supplier for Aegis.
Another new contract, for $85,958.80, is for fans for Sikorsky military aircraft, perhaps Black Hawk helicopters. Other new contracts indicate Rotron parts going into weapons systems made by Boeing and Texas Instruments.