COMMUNIQUE =
"Our focus when we developed the Agera RS was on achieving best possible glide performance at high speeds, combined with maximum canopy stability and forgiving collapse characteristics.
Many pilots have already confirmed to us that we have achieved this goal.
However there has been some isolated feedback regarding the handling of the Agera RS, particularly when centring in very small, weak thermals.
What was odd was that about 90% of pilots apparently had no complaints and even rated handling as being good or very good, whereas 10% (eight pilots of whom we are aware) found handling to be different from what was expected.
This prompted us to put a temporary suspension on supply of the Agera RS, so that we could investigate what was causing this.
The findings of our investigation:
- With some of the Agera RS gliders we inspected, the AI and AII lines had stretched more than we would have expected after even the first few flights, and with some of them the CIII had also shrunk. We haven’t yet been able to clarify conclusively with the manufacturer of the lines the exact reason for the variation in the length of the lines. However the changes in length were within the tolerances specified by the manufacturer and taken in isolation do not affect safety.
- At least one pilot was flying the Agera RS with an unusually wide distance between the carabiners of more than 60cm.
- Most of the pilots who experienced an issue with the Agera RS were flying it in combination with a lightweight pod harness without seat board, the harness geometry of which was to some extent very different from the harnesses used in development.
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Some of the pilots indicated that they applied a lot of outside brake when flying in thermals.
Results of internal investigation:
Each of the causes mentioned above taken in isolation resulted in at least a noticeable deterioration in handling during our test flights.
If more than one of these unfavourable factors applied to one glider, this led as a result to handling which was demonstrably “very distinctive” or unacceptable.
Action taken:
We have allowed for the stretch in the A-lines in all Agera RS gliders delivered in 2019, i.e. the lines are shortened by the stretch anticipated. A slight increase in trim speed will have to be expected during the very first flights, until the lines have “settled”.
In addition, we have optimised braking, which has allowed a significant improvement to be made to climb performance in weak conditions, with a simultaneous reduction in control pressure.
These steps have been agreed with the type-testing body and have no effect on safety.
With these steps, we have firstly achieved a clearly noticeable improvement in handling and secondly made the Agera RS less sensitive towards the other factors mentioned above. We are therefore offering a free upgrade to anyone who has bought an Agera RS, which will bring the glider up to date.
Before returning a glider to us, we ask pilots to contact SWING Flugsportgeräte GmbH directly (for Germany and Austria), or our representatives in the relevant country (Contact: swing.de/vertrieb).
PLUS =
https://xcmag.com/news/gear-news/swing-agera-rs-updated/ (upgrade 2019)
