Under-Wing Fuel Tank for Freewing L-39
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This is an under-wing fuel tank for the Freewing L-39 80mm EDF (just the tank itself, not the wing pylon).
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- 0 / 5
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- 6
- Pobrania
- 54
- Wydruki
- 0
- Wyświetlenia
- 350
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- 0
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- RC & Robotics
- Licencja
- Creative Commons — Attribution
3D printed wing tanks for the L-39. I bought my plane 2nd hand and it had the pylons installed, but was missing the tanks, so I designed them in OpenScad.
Printing
I printed the front and back parts of the tanks in LW-ASA (foaming) with 0.4 mm nozzle, 0.25 mm layer height, 4 bottom and top layers, 2 perimeters, and 2% gyroid infill. Printed like that the tanks feel solid enough and weigh around 30g each completed. You should be able to print them in any filament, but non-foaming will result in heavier tanks. The connecting/alignment tubes are optional, but will allow for easy alignment of the front and back parts when gluing them together. Those I printed in ABS with “standard” settings, but any material will do. Could also use a short (<50mm) rod/tube with 6 mm diameter (e.g., wood dowel or carbon tube) instead.
You will need 2 fronts, 2 backs, and 4 alignment tubes (optional) in total.
Assembly
Glue front and back together after inserting the alignment tubes into one of the parts (optional). Glue in magnets. I used medium CA for everything.
Hardware
Four magnets, as is the tanks are designed for 10x5x3 mm (rectangular prism) once I had lying around. Please feel free to modify the included .scad file to adapt to your magnets as needed.
Flying
After fitting them make sure to check CG before flying! If printed light they shouldn't shift CG, at least I couldn't measure a significant change. However, they introduce some additional drag compared to just the pylons that was noticeable during flying. It might be a good idea to keep the first flights with them on shorter and check battery consumption.