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Beams for Hang Gliders

Postby JoeF » Wed Mar 20, 2019 8:49 am

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
CentroidalBracedBeam.jpg (33.39 KiB) Viewed 2490 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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Image
splintedarm.jpg
splintedarm.jpg (200.25 KiB) Viewed 2488 times

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

Postby ARP » Wed Mar 20, 2019 10:36 am

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

It would seem to provide two functions the other being the drive shaft for the propeller!
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Re: Beams for Hang Gliders

Postby JoeF » Sat Mar 23, 2019 9:42 am

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

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Re: Beams for Hang Gliders

Postby Bob Kuczewski » Mon Mar 25, 2019 10:03 am

JoeF wrote:Airframed hang gliders generally use beams. ...

As in "beam me up"?      ;)
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