No die-cut or laser cut fins!
At the time, Estes would have you cut out a cardstock template, pencil trace and cut out the fins.
These fin cut lines were silk-screened on the 3/32" thick balsa. Centuri kits also had printed balsa.
Notice how the fins were printed on the sheet.
Six of the cut lines line up!
Fewer cuts and straighter fins -
All four fins cut out.
There is still some cut line ink around the edges.
TIP: This should be sanded off or the ink could bleed through your finsl paint!
These four fins did need to be stacked and gang sanded.
Standard practice in the 1960s!
Since my unofficial rocketry model motto is "flying like it's 1975," I'm happy to see older parts and techniques like the screen-printed fin templates or the Shock Lock.
ReplyDeleteFrom the archive http://modelrocketbuilding.blogspot.com/2011/06/harry-stine-shock-lock-patent.html
http://modelrocketbuilding.blogspot.com/2011/04/more-shock-cord-mount-ideas-part-1.html