10-04-2016, 11:18 PM
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Master Modeler
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Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 6,507
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Quote:
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Originally Posted by tbzep
Yes, they were vacu-formed with sheet styrene, left half, right half. Same as the fins for the Estes Maxi-brute kits. Thin styrene, careful trimming, sanding. Back in the day, good old Testor's cement that contained stuff the People's Republik of Kalifornia forbids. Today it's Tenax-7R, Pro-Weld, chlorinated brake cleaner, or equivalent.
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I miss the good old-formula Testors liquid plastic cement; it worked like a charm on the vacu-formed styrene parts of my father's Estes U.S.S. Enterprise kit. As with large fiber fins, I wouldn't care to use vacu-formed styrene fins whose rear portions protrude below the bottom edge of the body tube, because they would easily get bent or broken by the landing impact forces (although even a rocket with large, non-rear-protruding vacu-formed fins could suffer such damage if the rocket was swinging--as it might be on a breezy day--at landing). |