[JoeF]

Airframed hang gliders generally use beams. This topic studies beams with an eye for structuring hang gliders.
Have a beam note?
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CentroidalBracedBeam.jpg (33.39 KiB) Viewed 2491 times

Notice the airbeam that is stick-beamed stiffened by hoop lashings. (a use of splinted-fluid-beam technology, say recently with coined: tensairity)
Notice the lower centroidally-braced tri-longeron beam.
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Teasing start:
https://en.wikipedia.org/wiki/Beam_(structure)
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Avoid letting modern coined titles hide ancient public-domain technology:
https://en.wikipedia.org/wiki/Tensairity

"Mechanisms for deployable tensairity structures"
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Have a latex or PVC long toy balloon or "Thunder Sticks, Bam Bam Cheer Sticks, Blow Bar, Inflatable Boom Stick,s Noisemakers Stick, Football Noisemakers" stick. Adhesive tape drinking straws to the surface of the inflated airbeam balloon. Notice how the combination of the parts bring on a distinct anti-buckling result.
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splintedarm.jpg (200.25 KiB) Viewed 2489 times

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air-bagging TCF downtubes? (TCF :: triangle control frame)
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http://www.braider.com/Case-Studies/High-Pressure-AirBeam.aspx

[ARP]

"Notice the lower centroidally-braced tri-longeron beam."

It would seem to provide two functions the other being the drive shaft for the propeller!

[JoeF]

Soon we'll fly....
Thanks, ARP.
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https://www.researchgate.net/publication/313526868_Experimental_and_theoretical_study_of_deployable_composite_beam


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[Bob Kuczewski]

Airframed hang gliders generally use beams. ...

As in "beam me up"?