- Tandem Flights
Using new technology fed down from our World Champion competition wings, Airwave designer Bruce Goldsmith has managed to create an intermediate glider with significantly higher performance. Improved pitch and roll stability make this extra performance easy to use – it literally floats to the top of the stack with minimal inputs and glides away from the pack.
The Sport4 is an evolution of the Sport3 in many ways but it also has a lot of new features as well. It has one less cell at 52 instead of 53. The middle cell has been removed to give more feeling of stability though the harness, which is consistent with our CSS design concept that runs throughout the range of Airwave gliders, but we have opted for more stability to make the wing more accessible.
3 or 4 rows of lines
In recent years there has been a shift from 4 rows of lines to 3 rows of lines in high performance gliders. In fact, Airwave was the first brand to certify a 3 line glider with the DHV in the Magic4. So when we developed the Sport4 we also investigated the idea of having 3 rows. During the development of the Sport4 we had prototypes flying with 3 rows as well as 4 rows of lines and both flew nicely and passed the certification requirements. However, the 3 row glider was not as easy to fly as the 4 row version and so, for the production version of the Sport4,we have designed the wing with 4 rows of lines in the center of the wing and 3 rows in the tip. Thus enabling us to get the best of both worlds.
The Sport4 is the first of the Sport series of gliders to incorporate hybrid diagonals in the sail. This concept was designed to improve stability at speed as well as low speed performance in my competition glider. The concept has worked so well that I have now been incorporating it in the complete range of Airwave gliders.
1) Solid Ribs: At Airwave I started by using solid ribs (on the Magic and Sport1 for example). These ribs go from the tab to the top seam of the glider.
I have now invented a new type of diagonal ribs, which uses finger ribs on the A and B lines and solid ribs on the C and D lines. This gives a glider all the advantages of solid diagonal ribs and all the advantages of finger ribs as well. The Mustang2 was the first production glider using this new type of diagonal technology and I also used this in the competition glider that I flew (and won!) in the World Championships.
This is a new system that has never been used before and we are now incorporating into all Airwave gliders. It is very exciting and it works very well indeed.
The AR of the Sport4 has been increased from 5.15 on the Sport2 and 3 to 5.35 on the Sport4. This is a very modest increase in aspect ratio, and the other features of design of the Sport4 mean that we can get better stability and safety from this higher aspect ratio than we had on the Sport3 - enabling us to achieve more performance with better safety.
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