Overview
Electron is a two-stage, partially reusable small launch vehicle designed and built by Rocket Lab, a US-headquartered company founded by New Zealander Peter Beck. First flown in 2017, Electron is purpose-built for the small satellite market — offering dedicated launches to precise orbits on a customer's schedule, rather than requiring small-sat operators to ride-share on larger rockets and accept whatever orbit the primary payload dictates.
Electron pioneered several innovations in launch vehicle design: it was the first orbital rocket to fly with an electric-pump-fed engine (the Rutherford), the first to use extensive 3D-printed components in its engine (including the combustion chamber, injectors and propellant valves), and one of the first small launchers to seriously pursue first-stage recovery and reuse.
As of early 2026, Electron has completed over 55 flights from two launch complexes — Launch Complex 1 on the Māhia Peninsula, New Zealand, and Launch Complex 2 at Wallops Flight Facility, Virginia, USA. It is the second most frequently launched US rocket after Falcon 9 and the most prolific small-sat launcher in the world.
Specifications
| Parameter | Value |
|---|---|
| Height | 18 m (59 ft) |
| Diameter | 1.2 m (3.9 ft) |
| Liftoff mass | ~12,550 kg |
| First stage engines | 9 × Rutherford (sea-level) |
| Second stage engine | 1 × Rutherford Vacuum |
| Propellant | LOX / RP-1 (kerosene) |
| First stage thrust | ~224 kN |
| Payload to LEO (500 km) | ~300 kg |
| Payload to SSO (500 km) | ~200 kg |
| Fairing diameter | 1.2 m |
| Launch price | ~$7.5 million (publicly stated) |
The Rutherford Engine
Electron's Rutherford engine is a LOX/kerosene engine with a unique twist: instead of driving the turbopumps with hot gas tapped from the combustion process (as in most rocket engines), Rutherford uses electric motors powered by lithium-polymer batteries to drive the propellant pumps. This eliminates the complex, failure-prone gas generator cycle and simplifies the engine considerably. Each Rutherford produces about 25 kN of thrust (sea-level variant).
The engine's major components — combustion chamber, injector and propellant valves — are 3D-printed using electron beam melting, which allows rapid manufacturing and reduces production costs. Rocket Lab claims it can produce a complete Rutherford engine in about 24 hours, compared to weeks or months for traditionally manufactured engines of comparable complexity.
First-Stage Recovery
Rocket Lab has been developing first-stage reuse for Electron since 2019. Unlike SpaceX's propulsive landing approach, Electron's first stage uses aerodynamic deceleration: after stage separation, the booster deploys a drogue parachute followed by a main parachute to slow its descent. Early recovery attempts involved a helicopter catching the descending stage mid-air by its parachute lines, though Rocket Lab subsequently shifted to ocean splashdown recovery and marine retrieval.
Several boosters have been successfully recovered from the ocean and returned to the factory for inspection and refurbishment. The long-term goal is to reflew recovered boosters, which would reduce the cost of the first stage (estimated to be about 70–80% of the total vehicle cost) and increase launch cadence. As of early 2026, Rocket Lab has made significant progress toward operational reuse, with recovered stages undergoing testing and refurbishment.
Photon and Kick Stage
Electron can be equipped with Rocket Lab's Photon spacecraft platform or a simpler kick stage as a third stage, enabling missions beyond standard LEO/SSO orbits. Photon provides on-orbit manoeuvring capability, allowing precise orbit adjustments, lunar trajectories, and even interplanetary missions. The CAPSTONE mission to the Moon (launched June 2022) used an Electron/Photon combination to send a 25 kg CubeSat on a trajectory to lunar orbit — a remarkable demonstration for a small launch vehicle.
Neutron: The Next Step
Rocket Lab is developing Neutron, a medium-lift reusable rocket designed to carry up to 13,000 kg to LEO. Neutron is intended to compete directly with Falcon 9 for constellation deployment and medium-payload missions. It will use Rocket Lab's new Archimedes engine (LOX/methane, gas generator cycle) and feature first-stage propulsive landing similar to Falcon 9. Neutron's development, based at Rocket Lab's Wallops Island facility, represents the company's evolution from small-sat niche player to full-spectrum launch provider.
Who Uses Electron?
Electron's customer base spans government, military, commercial and academic sectors:
- US government — National Reconnaissance Office (NRO), Space Development Agency (SDA), DARPA and NASA missions.
- Commercial operators — Earth observation companies (BlackSky, Synspective, Planet Labs), IoT constellation providers, and technology demonstration payloads.
- International — payloads from the UK, Japan, South Korea, and various other nations seeking dedicated small-sat access.