https://hummingbirdmodelproducts.com/tsp-rocket-motors

I'm sure some of the people here may remember the Rapier super low thrust, long duration motors used in jetex type gliders and planes.

These are the 21st century versions.

They are not considered to be model rocket motors.

No ejection charges but they thrust goes up to 20 sec.

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"Old Rocketeer's don't die; they just go OOP".....unless you 3D print them.