See Through Model Rocket Engine

[adrian]

If the idea of someone modifying an Estes motor and then posting the results on YouTube upsets you, look away now.

On the other hand, if you want to see in, graphic, slow motion detail, exactly what goes on when you press the "Fire" button:
https://www.youtube.com/watch?v=_xvVJQSGHts&feature=youtu.be

 

[Marc_G]

My favorite part was when he was holding it in his protected hand, and started drilling into the nozzle with a power drill to clear it out... (shudder!)

 

[TRFfan]

two other people already posted this.

 

[TangoJuliet]

The best video yet of how a model rocket engine works! Though it should come with a warning: Do Not try this at home!

 

[dr wogz]

https://fliskits.com/products/01prod_fs.htm

this might be more appropriate..