Electron

📷 NASA Kennedy Space Center / Rocket Lab / Wikimedia Commons (Public domain)

Electron is a small orbital rocket designed and built by Rocket Lab, the company founded in New Zealand by engineer Peter Beck. Just 18 m tall and 1.2 m across, it carries up to 300 kg to low Earth orbit — a delivery van next to the freight trains of the launch industry. Since 2017 it has launched more than 60 times, making it by far the most successful small orbital rocket ever flown.

Electron’s body is carbon-fiber composite, and its 3D-printed Rutherford engines are driven by battery-powered electric pumps — a world first. Its pitch to customers is simple: instead of sharing a big rocket, a small-satellite owner gets a dedicated ride to exactly the orbit they want, on their own schedule.

Development History

Peter Beck founded Rocket Lab in 2006, and after a decade of engine development the first Electron — cheekily named It’s a Test — lifted off from New Zealand’s Mahia Peninsula on 25 May 2017. The rocket flew well but was destroyed by range safety when a ground telemetry glitch lost track of it. The second flight, Still Testing, reached orbit on 21 January 2018.

Rocket Lab built its own spaceport, Launch Complex 1 at Mahia — the first private orbital launch site in the world — and later added Launch Complex 2 at Wallops Island, Virginia, which hosted its first Electron in January 2023. Early on, the company added a kick stage powered by the small Curie engine to circularize orbits and drop off multiple satellites precisely.

Rocket Lab also experimented with reuse. Boosters parachuted into the ocean starting with Return to Sender in November 2020, and in May 2022 a helicopter briefly snagged a descending booster in mid-air before having to release it. The company settled on fishing boosters from the sea for study, feeding the lessons into Neutron, its much larger reusable rocket in development as of 2025.

Design & Capabilities

The Rutherford engine is the first orbital-class engine with electric turbopumps: instead of driving its propellant pumps with hot gas from burned fuel, it uses electric motors fed by lithium batteries. That makes the engine mechanically simple, cheap to 3D-print in volume, and easy to throttle — at the cost of battery weight, a trade that works at Electron’s small scale. Nine Rutherfords power the first stage and one vacuum version powers the second, burning kerosene and liquid oxygen for 224 kN at liftoff.

The carbon-composite structure keeps the whole rocket around 13,000 kg fully fueled — lighter than a single F-1 engine from a Saturn V. A dedicated launch lists for about 7.5 million dollars. Per kilogram that is expensive, but customers pay for control: their own orbit, their own timing, no waiting on a rideshare manifest.

Notable Missions

Electron’s biggest headline came in June 2022, when it launched NASA’s CAPSTONE, a microwave-oven-sized CubeSat, on the first leg of its journey to the distinctive lunar orbit planned for the Gateway station — proof that a small rocket, paired with Rocket Lab’s Photon spacecraft, could send a payload to the Moon.

Other milestones include the first ocean recovery of a booster on Return to Sender in 2020, the There and Back Again helicopter catch in 2022, and the first Virginia launch in January 2023, alongside dozens of dedicated missions for constellation builders, government agencies and startups such as Astroscale, whose debris-inspection satellite it launched in 2024.

Frequently Asked Questions

Why do Electron’s engines use batteries?

Every liquid rocket engine needs powerful pumps to force propellant into the combustion chamber. Most engines drive those pumps with complicated turbine machinery running on burned propellant; Rutherford simply uses electric motors and lithium batteries. Batteries are heavy, which would cripple a big rocket, but at Electron’s small scale the simplicity and precise control win.

How much does an Electron launch cost?

About 7.5 million dollars for a dedicated flight — one of the lowest total prices to orbit anywhere. Per kilogram it costs far more than riding along on a big rocket, but the customer chooses the exact orbit and launch date. It is the difference between hiring a taxi and taking the bus.

Is Electron reusable?

Not operationally. Rocket Lab recovered boosters from the ocean, briefly caught one with a helicopter in 2022, and in 2023 flew a mission with a previously flown Rutherford engine. Full booster reflight never became routine; instead the company channeled everything it learned into Neutron, its larger rocket designed for reuse from the start.

Where does Electron launch from?

Mostly from Launch Complex 1 on New Zealand’s remote Mahia Peninsula, the world’s first private orbital launch site, which has two pads and clear ocean downrange for a wide range of orbits. Missions for US government customers fly from Launch Complex 2 at Wallops Island, Virginia, opened for Electron in 2023.