On: Expanding Racks [video]

[Gravityloss]

The Stem Boom is another somewhat mind bending mechanical idea. You have a roll that when opened, creates a boom. This can be very small when stored and very long when unfurled. Or two rolls that together form a boom.

https://ntrs.nasa.gov/api/citations/20170003919/downloads/20...

[mitthrowaway2 → Gravityloss]

A similar mind-bending idea is the helical band actuator:

https://en.m.wikipedia.org/wiki/Helical_band_actuator

https://www.pacospiralift.com/solutions/spiralift-solutions/

[Gravityloss → mitthrowaway2]

Thanks, this is the mind-bendiest of them all, had never heard about it!