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Zebra II Launch Lug Standoff
I have started a build on the Centuri Zebra II Downloaded the plans, purchased all the parts from Semroc including the laser cut fins but do not have the size of the launch lug standoff.
Thanks in advance John
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John NAR #91135 L1 SAM #0037 |
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It uses BT-20 and BT-50 tubes, so the standoff should be the same height as the old Estes X-Ray. Mine is 5/32" so 3/16" will be plenty clearance. The LL-2B launch lug is 2.375" long, so make your angle cut so the standoff fits the lug.
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I love sanding. |
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The Centuri Zebra II is not remembered by many, but it is a nice design. I built a clone of it three years ago. For the standoff height, I just took the diameter of the payload section (0.976") and subtracted the diameter of the body tube (0.736") and then divided that number by 2. To insure clearance, I added another 1/32" to that, and I ended up with the same numbers that tbzep gave. For the length I marked off a length equal to that of the launch lug along one side of the piece, and then drew 45° angles away from each end of it toward the other side. It worked out to be 2.875" for the long side.
MarkII
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Mark S. Kulka NAR #86134 L1,_ASTRE #471_Adirondack Mountains, NY
Opinions Unfettered by Logic • Advice Unsullied by Erudition • Rocketry Without Pity
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Sorry about the standoff, John. It should have been on the fin sheet, but was left off. It is on there now.
Thanks for catching that!
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Carl McLawhorn NAR#4717 L2 semroc.com |
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Carl
No problem I'm glad in a round about way we could help you out. After I posted I went back into my built pile and took a look at the Semroc X-Ray kit and slapped the Zebra II payload section on the X-Ray a perfect match. I have an extra stanoff so problem solved. Decal will be coming from Fred. We will see how it goes will post a photo of both side by side unfinished. Thanks guys John
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John NAR #91135 L1 SAM #0037 |
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John,
Your replacemenrt decals went out yesterday.
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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/ |
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YESSS! Woo-hoo! [virtual fist-bump] MarkII
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Mark S. Kulka NAR #86134 L1,_ASTRE #471_Adirondack Mountains, NY
Opinions Unfettered by Logic • Advice Unsullied by Erudition • Rocketry Without Pity
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Gordy Decals for Zebra II arrived today very nice. Now back to sanding. Thank You John
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John NAR #91135 L1 SAM #0037 |
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always liked this one - one of the seldom seen late Centuri designs.
photo attached of my own clone - one of the first decal sets I redrew myself ( back when I had good software,e tc ) . Think this one flew at NARAM 50, or at least had it there, lol ... enjoy, and keep the inspiration coming, hope my few finished pics help others along as much as others' do motivate me ~ AL |
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Quote:
MarkII
__________________
Mark S. Kulka NAR #86134 L1,_ASTRE #471_Adirondack Mountains, NY
Opinions Unfettered by Logic • Advice Unsullied by Erudition • Rocketry Without Pity
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