First scratch build flies on a C6-5

Oct 30, 2026 Last reply: 1 day ago 3 Replies
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The detail that caught me straight away is the weight: the whole airframe comes in at just 40 grams. For a first-ever scratch build, that is a disciplined figure, and it was apparently confirmed on a WeighMax digital scale rather than guessed at. Watching something that light climb into a clear sky and then come back down intact is exactly what this hobby is about.



The construction mixes classic and modern approaches nicely. There is a white cardboard body tube with wooden fins, so the airframe itself is traditional, but the engine mount assembly is a different story. It was designed in Autodesk Fusion 360 as a threaded unit, and the physical parts were printed on a Creality Ender 3. A threaded mount on a first rocket seems a genuinely smart choice to me, since swapping motors cleanly beats wrestling with friction fits. Recovery relies on a yellow plastic parachute.



The prep work stands out too. OpenRocket was used to display a flight profile, with a projected altitude around 300 meters on the C6-5, and a homemade launch controller was built to fly it. The flight itself went well, with the rocket coming down fully reusable.



The open question is the next step: developing a working flight computer. After that, a two-stage rocket with parallel separation is planned. Going from a 40 gram first build straight toward staging is an ambitious path, and I am curious how the electronics work will shape it.



Project by Ryan Dick. Watch it on their YouTube channel:

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The threaded engine mount is the choice I would highlight. Printed parts on an Ender 3 holding a C6-5 is a tidy bit of work, and threading it means the motor can be removed without tearing up the airframe. The trade-off is extra printed mass, but at 40 grams total for the airframe, that does not look like a problem here.

Curious about the flight computer plans. When the flight profile from OpenRocket showed around 300 meters, was that figure run before the first launch as the target for the C6-5, and does the maker expect the added electronics weight to be checked on the same WeighMax scale before the next flight?

For the flight computer, a suggestion: consider an ATTiny85 as the core. It saves both weight and space compared with bigger boards, and on an airframe this light every gram matters when the projected altitude is around 300 meters. A compact chip leaves more margin in a 40 gram design.

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