r/EngineeringPorn

This is before it's maiden and only flight as no reuse is planned

This EPROM chip, manufactured by STmicroelectronics, shows the intricate inner workings of integrated circuits (it is behind a quartz windo since UV can actually erase the information), with the memory cells in the middle, controllers on the side, and bond wires to the pins.

Fun fact: in some cases, data recovery can actually be performed by physically inspecting the memory cells under a microscope.

One of the less obvious reasons is the composite structure itself.

The interesting part is that composites allow engineers to tune stiffness and vibration behaviour directionally, simply by changing fiber orientation, laminate stacking or local reinforcements.

Two drone arms can look almost identical externally, yet behave very differently once airborne.

A frame with a laminate focused mostly on axial stiffness may react differently to propeller-induced vibration than one designed with more off-axis reinforcement. The result can affect: flight stability, sensor accuracy, camera vibrations, control response, autonomous navigation performance.

This becomes especially noticeable with HD mapping payloads, LiDAR systems, thermal cameras and high zoom optics

A lot of the engineering is basically invisible. The external geometry may stay the same, while the real tuning happens inside the laminate architecture itself. That’s also why in UAV engineering, manufacturing quality matters much more than you might expect. Small differences in fiber alignment, bonding or compaction can completely change the dynamic behaviour of the aircraft.

A transparent ETFE sphere contains a spherical concentrator that focuses sunlight onto a ceramic receiver, heating the internal air to generate lift. No combustion, no helium, no batteries.

The rotation mechanism uses two "pearl necklaces" — wires strung with small freely-rotating spheres that grip the envelope when tensioned and roll freely when not, allowing the concentrator to track the sun.

Still in the concept and early testing phase. Full documentation and updates on GitHub and Hackaday — links in comments.

Thoughts and challenges welcome. Especially the brutal ones.

https://hackaday.io/project/205609-nimbus-concentrated-solar-thermal-flight
https://github.com/michlore6-dot/Nimbus

YouTube video is live for interested folks and it has tons of real-world tests and engineering info on how I achieved this insane output