sentences:  Three of the four designs eventually won contracts and were built to varying degrees at the TTC; Garrett's wheeled vehicle started testing under jet power before the LIM reaction plate was installed, Grumman's vehicle was given an extensive track, but ran out of funding before the planned LIM reaction plate could be installed, and Rohr's vehicle was the last to arrive and received the least build-out with only a mile and a half of LIM-equipped track.Like the PRT systems, none of the TACV proposals would ever see commercial development.British Rail also attended, bringing with them a full-sized mockup of the Advanced Passenger Train, at that point still powered by a gas turbine before its conversion to electric power.