Thread: MPC History
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Old 07-21-2017, 12:41 PM
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Location: Fairbanks, Alaska
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Originally Posted by stefanj
The instructions for the Nike-Patriot I'm building refer, in the step where the plastic launch lug is glued on, to the tube covering as "plastic."

I think the tube core is just really high quality paper. Dense, completely wrapped. No gaps.

Least-favorite tube has a brown inner layer that isn't complete; held together by the outer layer.

I wonder if Myke Bergenske would remember these details, or if Bill Stine could help.

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Other oddments for this thread:

* AVI produced its own motors for a short time. Same as the MPC motors, but with funky 1970s labeling.
* At least one MPC kit had, on the instruction sheet's suggested motor list, what appear to be FSI motors! D4, D6, etc. Were these really FSI motors, or vaporware MPC motors?
* Who designed and build the MRI / MPC / AVI motor making machine?
* What became of the 13 mm motor making machine? Or was were those motors made on the bigger machine with some kind of alternate tooling set?
You may have solved this mystery with that one word ("plastic")--you jogged my memory of the scanned Nike-Patriot instructions on the Ninfinger Productions website. A high-quality spiral-wound kraft paper tube with a thin plastic overwrap (which might also have "soaked" into the upper layer of the paper, if the plastic was applied in a dissolved liquid [or molten] form) could also have the same physical characteristics as the MPC tubes, especially if the cured (or cooled & solidified) plastic was stiff (had a low elastic modulus). It would also--depending on its composition--be perfect for making strong plastic-to-plastic bonds (with the MPC styrene plastic launch lugs, for example), using ordinary plastic cement (if I recall correctly, the instructions called for using tube-type plastic cement).
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