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Technology / Hopper

Learning to land.

Our vertical takeoff and landing hopper. Built to develop autonomous flight, precision landing, and the systems a reusable rocket needs.

Explore the vehicle
Hopper hopper design with four landing legs, propellant tanks and engine
HOPPER / Flight demonstratorDesign render
Vertical takeoff. Controlled descent. Repeat.Flight sequence

The vehicle

Small hops.
Useful lessons.

Hopper tests guidance, landing control, and vehicle turnaround at low altitude before we apply them to larger vehicles.

Vehicle specifications
Height3 m / 9.8 ft
Stance5 m / 16.4 ft
Liftoff mass~650 kg / 1,433 lb
PropellantLOX / RP-1
Engine thrust7 kN / 1,573 lbf
01 / MANUFACTURING
Tanks before welding during Hopper manufacturing

Tank manufacturing

02 / PROPULSION
Linear motors for the Hopper thrust vector control system

TVC assembly

03 / VEHICLE
Completed Hopper vehicle at Oerlikon TUM Venture Labs

Hopper complete

  1. AI-generated illustration of Hopper tethered to an overhead crane during a flight testAI generated
    04 / Tether

    Tethered flight

    Validate propulsion and flight control under tethered conditions.

  2. AI-generated illustration of Hopper hovering untethered above a test padAI generated
    05 / Flight

    Free flight

    Test vehicle response, navigation, and recovery in free flight.

  3. AI-generated illustration of repeated Hopper flightsAI generated
    06 / Repeat

    Repeatable operations

    Repeat the mission and reduce turnaround time.

TKL-7 rocket engine
TKL-7 / LOX and RP-1 propulsion

Propulsion

Meet the engine powering Hopper.

LEAP71’s 7 kN TKL-7 engine burns liquid oxygen and RP-1 kerosene.

Designed with Noyron and 3D-printed in copper chromium zirconium alloy using laser powder bed fusion.

Thrust
7 kN
Material
CuCr1Zr
Manufacturing
PBF-LB
About LEAP71
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