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Summary: Learn how to mount the centering rings to build a Big Bertha Estes model rocket in this free model rockets video.
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About the Expert
Jack Attkins Jack Attkins is a model rocket enthusiast who has been launching rockets for 35 years. read more
Now we're going to take the engine mount tube, after we've wrapped the masking tape around the engine mount tube and we're going to apply centering rings. Centering rings are used again to center the engine tube in the body tube. Centering rings come in a piece of cardboard; in this model again it's a level 1 model, and you simply can pop them out of the packaging or the cardboard they provide and you got to punch out the cardboard; and you also need to punch them, punch out the center hole out of the centerings too. One of the centering rings has a dimple in it as seen here, the dimple is meant to go on the side of the body tube; I'm sorry or the engine mount tube where the engine mount clip is. And what you do is your centering ring will go around the tube and the 1/4 inch mark where the centering; correction where the engine mount clip is sticking out from the bottom part of the tube. Your other centering without the dimple will go in the front of the tube, of your other end of the tube of your other 1/4 inch mark and you'll have a dry fit of the engine mount tube and how it will look before it will be put into the body tube or the main body of the rocket. The engine mount tube will be, the centering tubes or centering clips will be; or centering rings will be glued in the next set.