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Thickness of Mars Snooper Fin Stock?
I want to build and blog the Estes Mars Snooper, Kit #K-20.
The instructions from JimZ's website say the fin stock is #BF-20A and BF-20B. Old Estes catalogs show the "20" designation as 1/16" thick balsa. The laser cut Mars Snooper fins are listed on the Semroc site as 3/32". Anybody know which thickness is correct?
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Hans "Chris" Michielssen Old/New NAR # 19086 SR www.oddlrockets.com www.modelrocketbuilding.blogspot.com http://www.nar.org/educational-reso...ing-techniques/ Your results may vary "Nose cones roll, be careful with that." Every spaceman needs a ray gun. Look out - I'm the Meister Shyster! |
#2
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Quote:
Both thicknesses are used. Thin stuff on the top fins, thick stuff on the bottom fins.
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"I'm a sandman. I've never killed anyone. I terminate runners when their time is up." Logan from "Logan's Run" http://sandmandecals.com/ |
#3
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Quote:
Thanks Sandman, that makes sense! On the JimZ page, the bottom fins are on one sheet (the 3/32") the top fins and cooling vanes are on a second sheet. (the 1/16")
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Hans "Chris" Michielssen Old/New NAR # 19086 SR www.oddlrockets.com www.modelrocketbuilding.blogspot.com http://www.nar.org/educational-reso...ing-techniques/ Your results may vary "Nose cones roll, be careful with that." Every spaceman needs a ray gun. Look out - I'm the Meister Shyster! |
#4
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Estes has had 5 fin stock thicknesses in the past; they were always the same thickness per part number, they did not change.
BFS-10x = 1/32 BFS-20x = 1/16 BFS-30x = 3/32 BFS-40x = 1/8 BFS-60x = 3/16 There never was a BFS-50x, but using the convention above, it would have been 5/32. Interestingly enough, the Mars Snooper II used ONLY BFS-20 fin stock for its die-cut fins, part number 32205.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, and HAVOC ! |
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