[JoeF]

NOTE ABOUT THE A TUBE:

Exterior of visual tube A may have collars, doublers, or the like.

TubeAmayhavecollarsdoublers.jpg (27.45 KiB) Viewed 735 times

In the past week, I've employed an ABC (or A, B, C) symbolic configuration for three tubes, where C is enclosed within B, and B is enclosed within A. I'd like to highlight a key point regarding the visual representation of "A" in this configuration: it's not necessary for the outer surface of A to be perfectly smooth, as this surface doesn't need to fit inside any other tube. This opens up the possibility of reinforcing A with collars or doublers at critical stress points, such as its two ends and potentially some sections along its 60-inch length.

Further, since As are visuals at tote, some As may be on their exteriors different from other As. The As of the LE can be different from the As for spreaders. Likewise the A on keel may be different from the other As. The As in spreader may be made to be doubly tapered to resist buckling.

So, how about signifying the species: A-lead, A-keel, A-spreader. Those three As might have same ID, but distinguishing exterior builds. Indeed, the stresses on A-leads will be distinguishable from the stresses on A-keel, and A-spreaders. So, these licenses should make for a more interesting solution for a tiny-packed HG.

[Chris McKeon]

Joe Mayme You can imagine My optimism regarding this Short Pack Deal. I mean here I sit watching these Posts with unbridled Enthusiasm. I GET IT}. I see the Problems with doing this with a Predator. Well John when He can take a break from teaching Peephole to Fly. So when John comes up here to give My Predator an IRAN, I will be asking Him about this Short-Pack Deal.

[JoeF]

Hi Chris, we might guess John's future comments, but I will wait on him.

The hang gliding community has widely used "short pack" as something that is less long than the pack that is most common for a given wing. Almost all "short packs" of commercially presented hang gliders are longer than this topic's limit of 5 ft. There is a strong invitation to have the tiny-pack of this topic also to result hopefully in an uncommon gross weight and an uncommon handiness in tote parameters. You are invited to join the tiny-pack movement.

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A note about a Doubly-Invaginating Joe Loop and Collar. "Joe Loop" may not have been used in the forum before; a Joe Loop might have been introduced under a different name, perhaps "Joe Strap" but there is an essential difference. The Joe Loop in one form might be a simple loop of flat webbing or ribbon, not too unlike topologically from a hang loop. A Joe Loop is born as an optional way to join two telescoping tubes. There is an image shared earlier in the topic's post. Let's note that the "Collar" need not be a full ring; rather, the "Collar" could be a split ring or even two parts that simply insert between the two webbing overlaps that occur when doubly invaginating the loop into the first tube.

Assume a join of two tubes uses a Doubly-Invaginating Joe Loop and Collar; say the collar has a small ring body diameter of 1/8th inch. And assume the join is part of the LE tubing. And then say one wanted to adjust the tautness of the sail by lengthening the LE slightly. One method might be by exchanging the first collar with a collar that was of larger small diameter; this would force the depth of the double invaginating to be slightly less.

[JoeF]

Assume one's tiny-packed HG (TPHG) features the sail in two halves, LS, RS. Assume the material fairly tough, low-density. And assume one will tolerate wear. Let's explore various potential uses of the LS and RS besides their primary use in being assembled to a flight-worthy HG.

LS might be toted as a wrap of a crutch; similarly for RS. But during a trek, perhaps one wants to settle some while at a park or spot in the hills. Maybe unwrap LS and have a ground cover; anchor some of the perimeter points of the LS to prevent wind from moving the ground cover. If the perimeter of LS was treated with some perfume or something that might discourage ants and other critters, then peace might reign some time while one picnics, naps, studies, prays, exercises, writes, etc. At that use of LS, one might take RS and bunch it for a seat or pillow or nap mat. Or perhaps use RS as a flag to signal position to other people. RS might be rigged to give a windshade, rainshade, dustshade, privacy blind, or sunshade.

[JoeF]

Safety Alert:

Regarding some arrangements of Double-Invaginating Joe Loop and Collar
When the collar is separable, the double-invaginating loop at the deep inside scene, the two webbing layers need to be firmed in position at the center of the tube by some positive means to prevent during flight any slippage of one or both of the webbing runs. A slipping out of one of the runs could collapse the leading-edge tube assembly.

It has already been noticed that the inner tube of the join is to have a well-radiused plug. That plug may feature one of several means to firm the position of the webbings of the Joe Loop. Think grooves, hook and loop, tying, mild pinning, and the like.

Similar alert regards Joe Strap with Collar or Stops. Arrange to firm the centering position of the strap at the end of the inner tube of the join.
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[dhmartens]

Unfortunately our telescopic design is being used for military purpose.
We will release it soon.
https://www.youtube.com/watch?v=BdqpxeiwSQo

[JoeF]

High school and college research projects regarding "Tiny-Packed Hang Glider"
might be a significant part of the Tiny-Pack HG Movement. A project could introduce learning opportunities of great variety. Clear invitations from Self-Soar Association or the like might be part initializations. Putting forward motivations in clear terms may increase participation.

[JoeF]

HG independent from the car?
--No car ride to the launch? Consider TPHG.
--No car transport of HG from home? Consider TPHG.
--No car transport of HG back to home? Consider TPHG.
--Invest car money into fine-tuned tiny-packed HG?
--Bus ride close-coupled to a HG? Consider TPHG.
--Pull HG across roadless terrain? Consider TPHG.
--Pull HG across a roaded nation? Consider TPHG.
--No car driver's license? No problem: still HG? Consider TPHG.
--No car? No problem: still HG? Consider TPHG.
--No car? Need a napper tent? Format a TPHG (tiny-packed HG) to have napper space? Consider TPHG.
Yet, having a TPHG still allows handy packing into a small car, a car from hitch hiking, an Uber or Lyft car or taxi, ...
--Couple HG with bicycle transport? Consider TPHG.
--Couple HG with motorcycle? Consider TPHG.
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Mechanical note:
Joe Socks, Joe Cups for joins in telescopic tubes do not have the challenges of the Joe Strap or Joe Loop addressed in the Safety Alert of yesterday.
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[JoeF]

Option to build custom Joe Cups:
Form rectangle of sheet material. Choose width to just avoid overlap. Wrap a cup bottom with the rectangle; bond it; pin it. Then flange the other end with a short strip avoiding overlap, bond, pin; have the flange with a small lip to capture and protect the end of the larger tube. If anti-wobble gap filling is still needed, then shim collars can be set on the small tube's inserted region; the shims need not be full rings; the shims' wrapping length may be less than the OD of the inner tube.

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For LE spar, what might be done with thin-wall steel "handles" (broom, scrapers, etc.) that are usually painted? Consider coupling them and then using bulkheads to hold a tension member. The bulkheads would tote separated; the tension member could be toted in a number of ways. Because of the compound spar, the diameter of the handles could be 0.80; packing might not be as efficient as telescoping, but the cost potential advantage might be interesting.

[JoeF]

Notice to hang glider manufacturers:

There's a real fear of missing out (FOMO) factor here.
If your competition is developing TPHG,
you might just be left at the rear of the launch queue.