From the Estes Model Rocket News, Volume 5, #1
The first reference I've seen for using an aluminum angle to mark body tubes for fin placement.
This MRN dates back to 1965. I thought it was a more recent idea for a tool.
In the same issue there's also a good plan for an Aerobee Hi.
To see the issue, go to www.oldrocketplans.com or, CLICK HERE
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