[Semper Fidelis]

So this is the solution !

TPHG 4.6 nested tubes to pack small

TPHG46-PACKING-USHAWKS.jpg (74.9 KiB) Viewed 95 times

Tomorrow in Germany (Munich), be ready, I'll see you soon in LA guys !

Semper Fidelis

[JoeF]

Thanks, Semper Fidelis, for the detail photograph of the tubes.
The shown is a solution for your TPHG 4.6 version 001, guessing

Opening and closing such a part pack at a beach site:
I hope you will have a drying-cleaning-de-static kit!
Maybe also a ground sheet that is meticulously kept sand free during packing.

Tube materials? Aluminum alloy and temper? Other?
=========================================

[JoeF]

Split tubing
One split, two splits, three splits, four splits? Axial split, helical split, lateral split? Partial split? Full split? Shims? Gap fillers? Torsion controls? Sail anchoring? Rigging anchoring? VG involvement? Adjustable torsion? Adjustable compression? Adjustable tension? Kedering?
The art of splitting tubing to obtain parts useful in some TPHG may or may not prove helpful; time will tell.
What could be the uses of tubing splits in some TPHG?


Unbaked ideation involving rich and poor hints and even errors are in the following AI chat:

User:
Split tubing
One split, two splits, three splits, four splits? Axial split, helical split, lateral split?
The art of splitting tubing to obtain parts useful in some TPHG may or may not prove helpful; time will tell.
What could be the uses of tubing splits in some TPHG?

Assistant:
Splitting tubing for a Tiny Packed Hang Glider (TPHG) could provide several functional benefits, depending on how the splits are designed and applied. Let’s consider various types of splits and their potential uses:

1. Axial Split (Longitudinal)
- Description: A straight split along the length of the tube.
- Uses:
- Adjustable Compression Stiffness: The split allows a tube to "collapse" or reduce its diameter, which could be useful for telescoping spar segments or adjusting compression in different flight conditions.
- Rigging Attachment: You could place rigging lines or other components through the axial split, eliminating the need for additional attachment points.
- Elasticity: An axial split might offer flexibility in parts that need to expand and contract slightly, such as tensioned rigging elements or structural tubes.

2. Helical Split (Spiral)
- Description: A spiral cut that runs along the tube’s length, similar to a spring.
- Uses:
- Torsion Control: A helical split can allow the tube to twist or deform slightly under torsional loads, which might help in absorbing forces and preventing sudden stress failures in the spars or compression elements.
- Tension Adjustment: This could be useful in dynamically adjusting rigging or internal tube tensions during flight. The spiral allows for length adjustment without disconnecting parts.

3. Lateral Split (Cross-Cut)
- Description: A horizontal cut perpendicular to the tube’s axis.
- Uses:
- Segment Assembly/Disassembly: Quick release or disconnection points could be created, especially where rapid assembly and disassembly of tube segments are critical.
- Tensioned Joints: This could create an easy method for slipping tubes over each other while maintaining the option to lock them with tensioning devices like straps or cords.

4. Multiple Splits (Two, Three, Four)
- Description: Multiple splits along the tube's axis or perimeter.
- Uses:
- Sectional Folding: A tube with two or more splits could be folded into a smaller package without fully detaching the segments, potentially aiding the compact packing design of a TPHG.
- Adjustable Rigidity: Multiple splits can reduce rigidity in certain sections while maintaining overall structural integrity elsewhere. This would allow more adaptive flight characteristics based on aerodynamic loads.

Possible Overall Uses in TPHG:
1. Telescopic Spar Adjustment: Split tubing may help in locking telescopic spars into place through expansion and contraction, ensuring rigidity or flexibility when needed.

2. Weight Reduction: Depending on the material and type of split, you could reduce material weight without losing much structural strength—a key goal in glider design.

3. Compression/Expansion: Split tubes could assist in making compression ribs or spar segments more adaptable during in-flight pressure changes, allowing for slight flex or resistance depending on the aerodynamic loads.

4. Modular Construction: Creating modular segments that can be connected or disconnected easily without heavy locking mechanisms or couplers.

5. Control Surfaces: Tubes with controlled splits could be used as part of variable-geometry surfaces that adjust camber, like in variable V-sections where tubes control the sock shape or tail reflexes.

The art of splitting tubing opens up possibilities for adapting both rigidity and flexibility, enabling further design options for compact, lightweight, and adjustable structural elements in TPHG systems.

User:
If I mention kedering in the present context, what comes to your mind?

Assistant:
In the present context of TPHG and split tubing, mentioning kedering brings to mind the idea of creating a sliding attachment system, commonly seen in tent construction or fabric structures, where fabric is attached to a frame using a flexible bead or cord inserted into a track or channel.

Here’s how kedering might apply to your TPHG design and split tubing:

1. Sliding Joint Mechanism:
- Split Tubing with Keder Track: You could split a tube longitudinally and add a keder track inside or outside the split. This would allow fabric (like the wing socks or other fabric elements) to be securely attached and slid into place along the tubing, making assembly and disassembly easier.
- Adjustable Fabric Tension: By using a keder track, the fabric covering could be slid and adjusted to ensure proper tension or alignment along the spar or frame structure.

2. Wing Sock Mounting:
- Keder for Wing Attachment: Kedering could be used to attach the wing socks along spars. A keder bead sewn into the fabric edge would slide into a channel, possibly split tubing, allowing for easy mounting and precise tensioning of the wing’s surface.

3. Dynamic Surface Control:
- In your design involving camber adjustment or tensioned control surfaces (e.g., reflexing tail or adjustable wing socks), kedering might allow for the smooth movement of these elements along the structural tubes. For instance, split or spiraled tubing could integrate a keder channel that adjusts as the spar segments are tensioned or compressed.

4. Quick Disassembly/Assembly:
- The use of kedering could make assembling and packing the TPHG faster and more efficient, as the fabric elements could simply slide into position along spars rather than requiring intricate lacing or wrapping mechanisms.

Overall, the idea of kedering evokes a useful method for achieving secure, flexible, and easy fabric attachment, potentially enhancing the compact, modular, and adjustable aspects of your TPHG design.