[JoeF]

Moyes Soars Higher: In-House Carbon Production Takes Flight!
At Moyes, hang gliding is not just a business–it’s a way of life, a family,
and a shared dream of soaring to new heights. That’s why we’re thrilled
to announce a huge leap forward: we’re now producing
our own carbon components right here in our Kurnell factory!

This in-house carbon deal could affect the making of TPHGs by Moyes.
Moyes does not yet make Tiny Packed Hang Gliders.

[JoeF]

Can we get away with "no keel"?
And no cross bar?
And no "spaneron"?
And no base "bar"?

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Pentagonal002TwoQueensHangForwardAndTriangleTips02.jpg (21.39 KiB) Viewed 12 times

Yes, it is possible to design a Tiny Packed Hang Glider (TPHG) with no keel, no crossbar, no spaneron, and no base bar, but certain design considerations must be addressed to maintain stability, control, and structural integrity.

Key Considerations for Each Omission:

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1. No Keel:
- Impact: The keel typically provides longitudinal stability and a central mounting point for control systems.
- Solution:

• Use a tensioned sail structure with pretensioned stay lines to maintain the shape of the wing.
  
• Incorporate a central post with upper and lower tension lines or a taut fabric network to stabilize the center, similar to a HexaStay Ring approach.
  
• Yaw stability can be achieved through wingtip rudder-like structures or differential wing tension.
  

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2. No Crossbar:
- Impact: The crossbar traditionally provides lateral rigidity and resists wing collapse.
- Solution:

• Rely on tensioned cables or internal bracing between leading edges to maintain structural integrity.
  
• A triangular or hexagonal stay system could provide sufficient lateral support without the need for a heavy crossbar.
  

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3. No Spanerons (as in Florian's TPHG)
--{error deleted}

4. No Base Bar:
- Impact: The base bar provides a control frame for pilot input and acts as a structural brace.
- Solution:

• The cross lines in the lower rigging result in a cable being formed between the lower ends of the two queen posts. That cable, when tensioned in flight, can take control inputs from the pilot, effectively serving the role of a "base bar".
  

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Benefits of This Design Approach:
- Lightweight and Compact: Reduces overall weight and improves packability.
- Minimalist Aesthetic: Simplifies construction and reduces component count.
- Enhanced Tension-Based Stability: Leverages modern materials (e.g., Dyneema or carbon fiber) for tension and compression load management.

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Challenges:
- Structural Complexity: Requires precise tension balancing.
- Control Sensitivity: Without traditional control surfaces, pilot input systems must be highly responsive.
- Aerodynamic Efficiency: Ensuring stability without traditional elements demands innovative wing shaping and tension management.

This approach aligns well with your goal of creating a highly compact and lightweight TPHG design.