Hydrgen it is then.Do the math on the internal volume of said wing filled with helium and you'll find that it's only 4.5 pounds lighter than if filled with air and that ignores the volume of any structure in the wing. I'll let you do the math on the fuselage volume and resultant weight decrease and then you can decide if it's worth your while or not
Yes. I've read about it. Hardto contain.Problem is helium leakage, Helium is Mother Natures Houdini which is why it's used for leak checking
How about using white 16 kg/m3 foam....and bond 1 mm thick plywood into those foam formers 2 cm thick and spaced 300 mm behind the spar and 150 mm spaced before it ? Then apply silk or mylar on the trailing part and full 1 mm plywood on the leading side+ thin class fiber and strips of carbon a top on the spar area...spar being made of 5 mm thick veneers of hard wood...so that root has "solid" wood and tips only one ply....caps 3 mm plywood ( birch ).Heavy! A 4.5' x 22' wing will have 100 lbs in it before the plywood skin and any structure, hinges, spar caps, etc.
The white foam I am familiar was the has no tensile strength so no for me.How about using white 16 kg/m3 foam....and bond 1 mm thick plywood into those foam formers 2 cm thick and spaced 300 mm behind the spar and 150 mm spaced before it ? Then apply silk or mylar on the trailing part and full 1 mm plywood on the leading side+ thin class fiber and strips of carbon a top on the spar area...spar being made of 5 mm thick veneers of hard wood...so that root has "solid" wood and tips only one ply....caps 3 mm plywood ( birch ).
The way he is describing it he is using thin foam ribs to take the lift loads on the flexible top skin. That is tension.White expanded polystyrene was used as a core material in all of the early Jabiru aircraft, it is the compressive strength, not the the tensile strength you need for a core.
Hydrogen lift has an additional issue of oxygen leaking in & causing a BIG KABOOM if the O2 content gets too high and no easy/good way to separate the O2 from the H2 with out "the earth shattering Kaboom"Hydrogen is even worse than Helium for slipping through what seems a solid.
Slow flight? You still need to resist gravity.
The lightest wings now flying are made of cloth. Very fancy, strong, cloth. Shaped & sewn so the air flow provides support, with synthetic strings to the load. Paragliders. It's a fairly mature technology today, still in progress.
The XXLite 2 is a single-surface ultra-lightweight mountain wing designed for serious Hike & Fly pilots and alpinists. This all-new wing delivers significantly improved performance and handling with a higher trim speed and easier landing, compared to its predecessor.www.flyozone.com
But if pressurized tech is your thing...
What to Wing? Immersed in Wing foiling since its birth. Translating our years of experience, working with high class kite designers and developing closely with watermen like Kai Lenny. Check our Wing range and share the passion with us.ozonekites.com
The LEI, ( leading edge inflatable ) technologies could be adapted to flying without the long lines of a paraglider, and a few kilos of carbon fiber in struts combined with intelligent power/pilot pod...
Don't let the apparent simplicity fool you. There's a lot of thought and product development.
All in all it's hard to beat aluminum tubing for ease of home manufacturing. It's technology and tooling easy to learn and cheap to purchase. I built 2 hang gliders in a garage with a portable drill and hand tools. Contracted out sewing to pros. That's it's own skill set.
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