bronicabill
Well-Known Member
- Joined
- Nov 11, 2019
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I am currently building my second AeroTech ARCAS HV kit and, as usual (for me anyway), have converted it to dual-deployment utilizing the included coupler as my avionics can, an Apogee e-bay sled kit upgraded to my particular needs, and a MissleWorks RCC3 dual-deployment altimeter. (Technically this is my third, as I built my second one a few months ago and totally screwed up my dual-deploy conversion due to not following known working methods, so decided to start over!!!)
What I'm wondering is if I should even consider 2-56 nylon shear pins on the upper section of this rocket to retain the nose cone until main chute deployment? My first version of this rocket, built nearly 15 years ago used friction fit, but I never felt 100% comfortable with that idea. (I must add that I only flew it once as dual-deploy before "life issues" forced the sale of it as I couldn't afford to fly it anymore.)
My biggest worry is the paper body tubes instead of FG or CF, and the need to reinforce any shear pin holes in the outer body so they don't eventually deform or rip out. Seeing as how this is only a 2.6" body tube, I don't think I'd need more than 2 shear pins max. Then... there is the additional need of a stronger BP charge to ensure the pins are sheared as needed... every single time!
Any input on this would be greatly appreciated! I've been flying model rockets for 50 years now, but practically all of them have been LPR. My ONLY venture into MPR was 12-15 years ago with my first AeroTech ARCAS kit!
Thanks!!!
What I'm wondering is if I should even consider 2-56 nylon shear pins on the upper section of this rocket to retain the nose cone until main chute deployment? My first version of this rocket, built nearly 15 years ago used friction fit, but I never felt 100% comfortable with that idea. (I must add that I only flew it once as dual-deploy before "life issues" forced the sale of it as I couldn't afford to fly it anymore.)
My biggest worry is the paper body tubes instead of FG or CF, and the need to reinforce any shear pin holes in the outer body so they don't eventually deform or rip out. Seeing as how this is only a 2.6" body tube, I don't think I'd need more than 2 shear pins max. Then... there is the additional need of a stronger BP charge to ensure the pins are sheared as needed... every single time!
Any input on this would be greatly appreciated! I've been flying model rockets for 50 years now, but practically all of them have been LPR. My ONLY venture into MPR was 12-15 years ago with my first AeroTech ARCAS kit!
Thanks!!!