1S Endurance drone, 30min flight time

74 g, 2-inch quad powered by one Molicel P28 2,800 mAh 18650 Li-ion cell.

The cell is not only the power source—it is also a stressed structural member. Its metal can works together with two high-modulus 3 mm CFRP tubes and PPA-CF printed mounts to create a very stiff airframe. Torsionally, it is much stiffer than a typical 2–3-inch toothpick frame. The tubes and printed frame hardware weigh 5 g; the complete flying build weighs 74 g, of which the cell itself is 50 g.

Besides the 7 printed parts (4x motor mounts, front and rear arm bands + fc mount) you will need 2x 80mm long cfrp tubes with 3mm diameter.
For best performance, print the parts from stiff but durable filament (I used PPA-CF).

Low-effort/low-cost build could use PETG & 3mm solid wooden dowels instead of CFRP tubes, with some weight/stiffness penalty, but it should still work (I didn't test that).

Suggested electronic parts:

• RCinPower GTS 1002 19,000KV motors

• 2015 propellers

• Hummingbird F4 V3 AIO or different 5v1 AIO board

• Molicel P28 18650 Li-ion cell

For Betaflight, I am using an aggressive UAV Tech preset for 1S whoops. It runs less filtering and significantly more D-term and master multiplier than the stock Betaflight settings.

In a 12:30 hover test it consumed 1,136 mAh—about 5.45 A average. A simple capacity-scaled calculation projects roughly 30:49 from 2,800 mAh, but I want to be explicit: that is an estimate, not a measured full-duration flight yet.

I designed the frame as an editable parametric model in TrussLab:

https://app.trusslab.ai/#/frame/micro-drone-1s@v1?tab=reactive-properties