THE MOTOR MOUNT

Construction Details

The basic design of the motor mount is the "Tube with in a Tube" (TWT) design which comes with the Loc Bruiser EXP 3" plus additional modifications to handle an "M" class motor. Below you will see the process of construction with an explanation for each process.

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In Photos 1 and 2 you can see the TWT design. I added 3/8" steel rods for support from the 2 centering ring all the way up through the bulkhead plate.

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In this photo you can see that I gave extra support to the TWT design by using 3/4 dowels long the outer tube and the motor tube.

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Here you can see how the steel rods are mounted to the second  centering ring and a better look at the dowel rod reinforcement.

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The 5th photo shows the motor Mount mostly completed with a few minor touch ups left to do. In Photo #6 you can see how the fins are attached. I have used 9 oz fiber glass tape as a fillet to attach the fins to the inner tube. I will use epoxy fillets with filler (#406 West systems) on the outside of the main airframe.

The motor mount will be partly constructed inside the booster section of the rocket. Before it is inserted into the booster section the bulkhead plate and top centering ring will be removed. This will allow epoxy to be poured down onto the third centering. Once the epoxy has cured the fourth centering ring will be installed and epoxied. Then the bulkhead plate will be installed and epoxied into place. The rear centering ring will also be epoxied in a 1/4 from the rear edge of the airframe.

 

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Last Revised 01/19/2006