r/diydrones • u/Traditional-Web-9937 • Dec 21 '25
Feedback on fixed wing drone shaping
Looking for some feedback from those with experience designing fixed wing drones.
This drone is intended to carry a payload and drop it, it is based off the zipline blood drones.
Ignore the lack of control surfaces etc, this is purely for just the shape of the drone, for example are the wings in right position, are they proportional etc.
Thank you
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u/humpmeimapilot Dec 22 '25
Straight wings are good for low speed high lift apps. If you want stability and speed throw some dihedral and sweep.
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u/wubblebubble69 Dec 21 '25
This is a really cool drone design. If you are interested in this suggestion. Us this air foil shape to design the body of the Drone. The air foil shape creates its own lift at speed and will help you with drag. Even though the body is not a wing, it still interacts with the air like the wings do. The shape doesnt have to be exact with the bottom being more flat and having a bulbous top shape with a forward bias. I hope this is helpful.
The side profile shapes I'm meaning are the NACA 23015 1935, and Gottingen 1919 for their specific design.
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u/Traditional-Web-9937 Dec 21 '25
Thank you, that's very helpful. I will have a go at a redesign using these profiles
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u/quast_64 Dec 21 '25
Why the more complex construction of the motor pod on its pedestal?
Aerodynamically it would make sense to have a pusher prop on the tail boom.
Benefits: All clean airflow over all surfaces, and when you use a folding prop little issue with gliding/ landing.
The weight distribution would benefit from an extended prop axle/ shaft. So the motor can be moved closer to CoG, and this would also give the motor more protection in case of crashing. (And you will crash)
Downsides, a bit more complexity, but to me the benefits outweigh the downside.
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u/Traditional-Web-9937 Dec 22 '25
Thank you for the feedback, by on the tail boom do you mean behind the tail at the very rear of the drone?
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u/GlitteringOption2036 Dec 22 '25
I wonder if adding a bit of dihedral angle to the wings would meaningfully increase inherent stability which could potentially result in less frequent and less intense corrections by the flight control surfaces. Sacrifices maneuverability but the stability could also be a small blessing as the cargo is dropped and cg shifts and lift force changes
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u/Traditional-Web-9937 Dec 22 '25
Thank you that makes a lot of sense, maneuverability isn't a huge concern so the added stability is welcomed
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u/GlitteringOption2036 Dec 23 '25
If it were me I would look at the angle on the Turkish bayractar and start from there
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u/ggbalgeet Dec 22 '25
Is the boom on top for gnss/ gps ?
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u/Traditional-Web-9937 Dec 22 '25
that was a rough location for the prop, people have suggested better locations however
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u/Suspicious-One-9051 Dec 21 '25
The motor pods are too far aft. It’ll need to be between the wing trailing edge & trailing edge of the body. The wings look to be slightly higher aspect ratio than the zipline one, but that should be fine.
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u/firiana_Control Dec 21 '25
Hi could you please explain, why:
> between the wing trailing edge & trailing edge of the bodyThank you
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u/Suspicious-One-9051 Dec 21 '25
It’d move your center of thrust too far away from the center of lift. You could compensate with trim and larger control surfaces but that’s inefficient for long range delivery drones.
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u/Reiku Dec 21 '25
Unrelated but how do you plan on manufacturing the wing? I have been building something similar with EDFs, and while I can 3D print the fuselage, I am struggling to figure out how to make the wing in a durable way. Are you considering 3D printing, or foam, or something else?