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ID 3.9" OD 4.020"
- G12 fiberglass from wildman rocketry
Tools
- Radial indexer
- Center Drill
- 2323/64 Drill Bit
- 27/64 Drill Bit
- 39/64 Drill Bit
- 100 degree Countersink
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Set up radial indexer. Tram with dial indicator to 2 thousands of an inch accuracy in x and y, tram to 10 thousandths of an inch radially.
Started with a stock of length 23 15/16" (this is just the size of the one from wildman, but anything that is 19.5" or longer works)
- Left 2" for clamping space on one side
- center Center drill --> through hole --> counter sink
- Drill holes at 1200 RPM & counter sink at 200 RPM
- Move to the next set of holes based on drawing.
- Flip the tube after the first half set of holes to finish the rest.
- Cut the tube to size, leaving 0.01" extra which would be sanded down to exact size
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