Model Rocket Motors & Engines

Genuine Klima model rocket motors and engines, shipped from the UK. Every motor ships with an electric igniter and delivers the consistent thrust and reliable ejection you need for a clean parachute recovery. We stock classes A to D — from gentle first flights to higher, faster launches.

Important

Rocket motors are classed as dangerous goods in the UK. This means that they can only be purchased by an adult who is over 18 years old. Motors must also be shipped in accordance with ADR regulations.

7 products

More About Rocket Motors

How rocket motor classification works

Model rocket motors are classified by letters (A to O) and numbers. The letter indicates the total impulse range, and the number represents the average thrust in newtons. For example, a C6-3 motor has a total impulse range of 5.01 to 10 N·s, produces 6 N of average thrust, and has a delay of 3 seconds before firing the ejection charge.

Motor sizes and power levels

  • Low Power Motors (A to E): Suitable for beginners and small rockets.
  • Mid Power Motors (F to G): Require some experience and can lift larger rockets.
  • High Power Motors (H and above): Used for larger, more advanced rockets and 
    require certification.

Motor Codes

  • A motor code like C6-3 breaks down as follows:
  • C: Total impulse range.
  • 6: Average thrust in newtons.
  • 3: Delay in seconds before the ejection charge.

Storage and handling

  • Store motors in a cool, dry place away from heat sources and direct sunlight.
  • Handle motors with care, avoiding rough handling or dropping.

Safety and certification

  • High power motors (G and above) require certification from organizations like the 
    United Kingdom Rocketry Association (UKRA).
  • Always use safety glasses and follow launch safety guidelines.

Which motor should I choose?

Match the motor to the rocket's weight and the manufacturer's recommendation printed on the kit. Lighter rockets fly well on A–B motors; heavier or taller builds need C–D for a stable, high-enough flight to deploy the parachute safely. The number after the letter is average thrust in newtons; the final number is the ejection delay in seconds — a longer delay suits a lighter rocket that keeps climbing after burnout. Our starter kits list the exact motors they take, so you can't go wrong.

How a model rocket motor works

Three stages in a few seconds: the propellant burns and lifts the rocket off the pad; a smoke-producing delay charge tracks the rocket to apogee while it coasts; then the ejection charge fires to push out the parachute or streamer for a gentle recovery. Every motor we sell includes the electric igniter needed to launch it from a safe distance.