The TAC request for a fighter-bomber was addressed with the F-100C which flew in March 1954 and entered service on 14 July 1955, with the 450th Fighter Wing, Foster AFB, Texas. Operational testing in 1955 revealed that the F-100C was at best an interim solution, sharing all the flaws of the F-100A. The uprated J57-P-21 engine boosted performance but continued to suffer from compressor stalls. However, the F-100C was considered an excellent platform for nuclear toss bombing because of its high top speed. The inertia coupling problem was reasonably addressed with the installation of a yaw damper in the 146th F-100C, later retrofitted to earlier aircraft. A pitch damper was added starting with the 301st F-100C, at a cost of US$10,000 per aircraft.