Model Rocket Building Blog
Flying Engine Mount Build Part 1, Parts? DIY Centering RingsThis is a spare parts odd-roc based on Steve Lindeman's Little Me-Me. Steve's design was a left over engine mount from the Estes Jetliner kit. He upgraded the Jetliner to 18mm engines. The leftover 13mm engine mount was assembled and launched as a spool. To build it you'll need: 2 5/60 ...[Read More]
Flying Engine Mount Build Part 2, DIY Centering RingsInitially the center hole will look rough. Slip in a BT-5 and shave off any raised edges. Don't take off much, you'll still want a tight friction fit around the BT-5. It's easier to separate the rings before cutting the outside circle. The outside circle can be cut with strong, sharp scissors. ...[Read More]
Flying Engine Mount Build Part 3, Engine Hook NotchThe lower ring will need a engine hook relief notch. Use a rotary punch. Knock off the corner ends with a knife. The inset picture shows the finished notch. I didn't realize it until after everything was glued up I forgot the launch rod holes! Punch a hole in each ring opposite the engine hook ...[Read More]
Flying Engine Mount Build Part 4, Gluing It TogetherNotch the tube 1 1/2" from the rear for the engine hook bend. The lower ring is glued 1/4" from the end of the BT-5. A wrap of electrical tape goes above that. Here's how the mount glues together. While the instructions show the upper ring flush with the end of the engine mount tube, I set it back ...[Read More]
Flying Engine Mount Build, FinishedI forgot the launch lug holes! You won't need a launch lug on this one. Two holes in line through the centering rings is all it takes. Ideally, the holes should have been punched before the rings were glued on. My rotary punch doesn't allow me to get close enough to the engine mount tube. It'll ...[Read More]
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