ColumbiaNX01
Red blooded white American male
What is everyones thoughts about a 11' tall rocket 5" diameter with a 4" motor tube on a CTI O3400?
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What is everyones thoughts about a 11' tall rocket 5" diameter with a 4" motor tube on a CTI O3400?
I plan on 2 layers of 5.7 oz 2x2 twill Carbon Fiber tip to tip
Oh yea process would be like this: Glue in motor tube with centering rings, but leave the after CR off. Then tack in fins. Apply internal fillets where the fins touch motor tube and also where fin tabs touch airframe. There would be 12 total internal fillets. Then glue in aft centering ring. Also, a thrust plate is going to be used. Then the outside fillets. On top of that tip to tip.
What is everyones thoughts about a 11' tall rocket 5" diameter with a 4" motor tube on a CTI O3400?
I'd suggest using a TON of centering rings under the fins and filling the fincan with the highest-density expanding polyurethane foam you can get, before carefully surface mounting the fins on top.
I used 5 minute epoxy to tack fins on.
I plan to foam is on order!!!!
Not to sound like a jerk or anything, I'd just hate to see you waste your money. O motor rockets aren't built with 5 minute epoxy and expanding foam or the "foam and fly" method. That should be saved for 29 or 38mm kits.
I'm not entirely certain what the foam brings to the project (unless you are using something like the 8# stuff from US Composites). I would think a better solution is the inject-able fillet process Wildman espouses. Do it once to get the MMT to fin then flip it around and repeat for the fin to inside the BT fillet). The carbon fiber reinforced epoxy is quite durable. Alternatively, just slit to the back end, and assemble the fin can outside the body with glass tape mounting the fins to the MMT.
Considering you are already planning tip to tip, I just think the foam is gilding.
maxvelocity Not to sound like a jerk or anything, I'd just hate to see you waste your money. O motor rockets aren't built with 5 minute epoxy and expanding foam or the "foam and fly" method. That should be saved for 29 or 38mm kits.
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