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2025年1月25日 · Hello! I've been trying to design a 38mm minimum diameter J510 recently but I'm new to minimum diameter rockets going near mach 2 and had some questions about fin sizing. I saw another post recommending 4 fins and 1.2-1.5 ratio fin height/diameter for flights near mach 2+ but that makes my...

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2025年1月1日 · Keeping hybrid propulsion topics active is what we do... Previous Threads: Hybrids 2015 Hybrids 2016 Hybrids 2017 Hybrids 2018 Hybrids 2019 Hybrids 2020 Hybrids 2021 Hybrids 2022 Hybrids 2023 Hybrids 2024 Here we begin another year on the topic of hybrid propulsion and all activities...

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