Rutherford is a liquid propellant rocket engine, designed in New Zealand by Rocket Lab. It uses LOX and kerosene as propellants and is the first flight-ready engine to use the electric pump feed cycle. It will be used on the company's own rocket, Electron. This is a similar arrangement to the Falcon 9, using nine identical engines on the first stage and one, optimized for vacuum with a longer nozzle, on the second stage. It produces 22,000 N (5,000 lbf) and has a specific impulse of 327 s (3.21 km/s). It was qualified for flight on March, 2016 and is expected to debut in early 2017.