#1
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Nose Cones on Payload Section
Recent Mid Power builds include Payload sections with recovery system below in the booster section, popped by motor's ejection charge as normal. I would like to keep the nose cone removable to allow access for altimeters, etc. Tape around the shoulder has failed for me. Maybe Rivets or Screws,
Any opinions on what's the best way to secure nose cone? |
#2
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Quote:
By "tape around the shoulder" do you mean a friction fit? That doesn't always work. Instead, I wrap tape on exterior of rocket where the nose cone - body tube meet. This is not a friction fit. You want to make it look nice, then use aluminized mylar tape. I've also used colored electrical tape which seems easier on the underlying finish but does a nice job at securing nose cones.
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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#3
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Screws are a more-positive non-finish-marring retention method.
That said, I have had zero cone retention issues using friction fitting through H-power.
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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, TURMOIL, FIASCOS, and HAVOC ! |
#4
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Screws also work. I have used metal and nylon screws on different projects. With cardboard tubes, you probably want to reinforce the holes in both the tube and nosecone since they can wear over time and get large enough that the screws fall out. A little CA around the edge of the holes in the tube is a quick reinforcement.
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#5
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Yes, screws work for me too.
I use teeny tiny wood screws.
__________________
"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/ |
#6
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how do you gauge how tight to make it without making it destructive to get the cone in and out.
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#7
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teeny as in #4 or # 6 by about 3/8?
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#8
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seems like nylon screws would hold down the weight. What size would you use on a 3" and a 4" rocket?
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#9
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Friction fit is what I have been using with mixed results. Can't tell if I have it tight enough because I don't get to fly my MPR birds a lot. The electrical tape idea sounds interesting although I'd like a cleaner look if possible.
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#10
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On my Estes Mammoth, I wanted to be able to bust it in half for easier transport. I used very small screws (around #3 I’d guess) in 3 locations (since it’s a 3-finned rocket, I wanted symmetry.) I toughened the holes in the tube with thin CA. The screws go into the coupler, and I toughened these holes with CA as well.
If you want a quick-to-connect/disconnect solution, Apogee sells nice two-piece removable rivets. A 10-pack is $3.86. https://www.apogeerockets.com/Build..._Plastic_Rivets
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Lee Reep NAR 55948 Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor In the Paint Shop: Nothing! Too cold! Launch-Ready: Farside-X, Maxi Honest John, Super Scamp |
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