The 1994 contract with ETI was originally for 63 buses: 3 demonstrators and 60 production. Costs for 4 were used to pay for handicap redesign, and two were deleted to pay for the KAMAN project.
Contract dollars remained the same, and RTA got the 3 prototypes and 54 production ETB's.
The KAMAN dual mode (trolley+battery) bus(es) were diverted from the 1994 ETB contract, and took the place of 2 ETI's. One actually ran up in Boston.
The RTA terminated the contract before it was completed, getting tires and poles back. Kaman retained the buses. They were standard 40' RTS shells off of the NYCTA production series.
The thing went like a rocket even under battery power, and ran several miles. Charged the batteries from the trolley wire. Never got the HVAC system incorporated before termination of the contract.