These motor retainers from Aero Pack are super simple and have a really clean look. They're designed to be bonded to the back of a rocket's motor tube and the twist on & off retainer cap allows for easy loading/removal of rocket motors before/after your flight. They're made of aluminium and are coated with a smooth black anodised finish.

 

FREQUENTLY ASKED QUESTIONS

 

What does a retainer do?

A retainer holds the motor inside the motor tube and prevents it from sliding out the back of the rocket. Retaining the motor during flight is crucial because when the ejection charge fires at apogee, the motor wants to shoot out the back of the rocket (Newton's 3rd law: equal and opposite reactions).

 

Which motors does this retainer work with? 

All of them! This type of retainer works with all brands of motors (both Cesaroni and Aerotech) and all types of motors (both single use and reloadable)

 

What epoxy should I use?

The motor retainer is in direct contact with the back of the motor case and can get extremely hot during flight. This means you need an epoxy that can survive high-temperatures, such as JB Weld Original, or if you're not the patient type (like me), you can use the quick-set alternative JB Weld KwikWeld. You should be able to find this at your local Repco or Jaycar electronics store (not usually sold at Bunnings).

Retainer Assemblies (Tube Mounted)

$31.99Price
Size
  • Retainer Type Compatible Motor Tubes
    24mm L

    Apogee paper

    Estes paper

    24mm L2

    Aerotech paper

    LOC Precision paper

    24mm P Performance Rocketry Fiberglass
    29mm L

    Apogee paper

    LOC Precision paper

    Madcow paper

    29mm L2

    Aerotech paper

    Madcow fibreglass

    29mm L3

    Madcow paper

    Performance Rocketry fibreglass

    Wildman Rocketry "thin-wall" fibreglass

    29mm P

    Blue Tube

    PML & GLR phenolic

    Performance Rocketry fibreglass

    38mm L

    Blue Tube

    LOC Precision paper

    38mm L2 Wildman Rocketry "thin-wall" fibreglass
    38mm P

    Madcow paper

    PML & GLR phenolic

    Madcow fibreglass

    Performance Rocketry fiberglass

    54mm L

    Blue Tube

    LOC Precision paper

    Madcow paper

    54mm P

    PML & GLR phenolic

    Performance Rocketry fiberglass

    75mm L LOC Precision "heavy-wall" paper
    75mm P

    Blue Tube

    PML & GLR phenolic

    Performance Rocketry fiberglass

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