Why a Fixed Geometry Parawing Quickly Reaches its Limits — and How the PushBar System® Changes the Game
On a classic fixed-geometry parawing, reducing power often leads to a global distortion of the wing's behavior. As a result, in gusts, the rider has to contend with a reduced control margin, less stable heading management, and a rapidly narrowing usable wind range.
It is precisely this mechanical constraint that SROKA sought to overcome with the PushBar System®, a system developed to provide true dynamic power control on a compact soft wing. The name PushBar System® is a registered trademark of SROKA, and the associated innovation is the subject of a patent application filed with the INPI and is currently patent pending.
Applied to the Fynix SROKA, this principle offers a new perspective on the parawing: more stability, finer steering, better harness utilization, and the ability to maintain more control when the wind picks up.
1. The Real Problem with Fixed Geometry Parawings
On a fixed-geometry wing, the rider does not freely choose between power, comfort, and heading: everything is linked. As soon as traction needs to be reduced, one often has to accept a decrease in overall efficiency, a more unstable feeling in gusts, and a less confident use of the chosen size.
In other words, a large part of the limitation does not just come from the wind or the rider's skill level, but from how power is managed on the wing. This point becomes crucial when trying to get going early, stay efficient upwind, or hold out longer in strong winds.
2. What the PushBar System® Changes
The PushBar System® was designed to provide dynamic power modulation without exactly reproducing the limitations of a classic bar on a fixed geometry. The objective is simple: to allow the rider to use a larger wing when it makes sense to take off early, and then regain control once launched.
In this logic, the system helps to:
- better absorb gusts;
- improve the overall stability of the wing;
- better maintain heading and useful speed;
- more confidently use certain sizes with a harness;
- rationalize the quiver by increasing the usable wind range per size.
Reference Test Configuration
- Rider: 80 kg
- Foil: UHA 1100 cm²
- Board: LW Middle Length 90 L
- Sizes tested: 3 m², 4 m², 5 m²
Observed Ranges in this Configuration
- 3 m²: 23 to 35+ knots
- 4 m²: 14 to 29 knots
- 5 m²: 10 to 25 knots
In this test scenario, the 4 m² with harness remained usable beyond 25 knots for an 80 kg rider.
3. Performance Analysis: Heading, Control, and Comfort
On the water, the difference is not just about "having less traction." The benefit is primarily measured in the quality of riding: the ability to keep a larger wing when needed, superior comfort in wind variations, and maintaining a cleaner trajectory.
In this regard, tests have highlighted:
- an approximately 3 to 4° upwind gain compared to fixed-geometry wings;
- more active power management in gusts;
- reduced fatigue during long sessions;
- better consistency between early takeoff and control once launched.
| Criterion | Fixed Geometry Parawing | Fynix SROKA with PushBar System® |
|---|---|---|
| Power Management | More constrained traction reduction, with rapid compromises | More dynamic modulation and pursuit of finer control |
| Response in Gusts | More sensitive to sudden variations | Behavior designed to remain more manageable in squalls |
| Upwind Performance | Heading penalized faster as control deteriorates | Observed gain of approximately 3 to 4° in the test configuration |
| Harness Use | Faster limited depending on size and wind | Better utilization of certain sizes possible |
| Fatigue | Sometimes more physically demanding sessions | Calmer and less challenging riding |
| Usable Range per Size | More restricted | Wider in the presented use case |
| Quiver Rationalization | More sizes needed to cover a wide spectrum | Potentially lighter quiver thanks to better versatility per size |
4. See the PushBar System® in Action
To remember: the PushBar System® is not presented here as an absolute or universal promise. It is a SROKA development aimed at improving active power management on the parawing. PushBar System® is a registered trademark of SROKA, and the associated innovation is currently patent pending.
FAQ — PushBar System® and Wind Range
What does true sheeting provide on a parawing?
True sheeting allows for dynamic power modulation without experiencing the same limitations as a fixed geometry. This improves control, stability in gusts, and the utilization of the usable wind range.
What is the difference with simple depower?
Simple depower reduces traction, but does not necessarily change the wing's underlying aerodynamic logic. The PushBar System® aims to provide finer control of power and sail behavior in use.
What does controlled profile breakage in the center allow?
It allows power to be reduced progressively and controllably, without instantly losing all of the wing's useful behavior. This helps to better absorb gusts and maintain more control.
What upwind gain has been observed?
During trials, an upwind gain of approximately 3 to 4 degrees was observed compared to fixed-geometry wings, under a given protocol.
Under what conditions were the tests conducted?
Reference tests were performed with an 80 kg rider, a UHA 1100 cm² foil, a LW Middle Length 90 L board, and sizes of 3 m², 4 m², and 5 m².
Is the PushBar System® compatible with a harness?
Yes, harness use is one of the scenarios discussed for the Fynix, particularly to better utilize certain sizes in strong winds.
How does the system react in gusts?
The principle sought is to provide more active power modulation and better control of the wing's behavior in wind variations.
Does the PushBar System® help with relaunching?
The system primarily aims to improve power management and control during riding. Relaunching assistance always depends on the conditions, the rider's technique, and the general setup.
For what practices is the system relevant?
The PushBar System® is designed for uses such as freeride, downwind, technical progression, and certain performance-oriented practices.
Is the PushBar System® protected?
Yes. PushBar System® is a registered trademark of SROKA, and the associated innovation is the subject of a patent application filed with the INPI and is currently patent pending.
Does the system adapt to all skill levels?
The Fynix equipped with the PushBar System® is presented as suitable for initiation, progression, freeride, and performance, depending on the rider's weight, the spot, and technical level.
Does the system eliminate all limitations?
No. It provides an additional margin of control, but does not replace learning to foil, choosing the right size, or reading the wind and water conditions.