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Tuesday, January 21, 2020

AD Rise 4 S (72-92)

AD Rise 4

The Rise 4 is the new 2020 high B glider from Air design with an aspect ratio of 6. 
Launching the Rise 4 S (72-92) at 90 is immediate and straightforward, as the glider has some light materials with a weight of around 4.25 kg.
The turning radius inside the thermal can be very narrow, due to the short, precise and agile behavior of the wing. The brake pressure is on the average side, with a linear brake response. 
The movements in turbulent air are dampened for a glider with that aspect. In the comfort zone, it resembles the Eden 7 which is also very comfortable to fly. 
The climbing performance in (no wind, no sea breeze) is excellent !  as the Rise 4 floats inside that thermal without losing it. It’s just when there’s a wind factor or a valley breeze, that things changed a bit. I tried to fly the Rise 4 at 86 and at 92 and in both cases it’s a bit reluctant to dig in and climb as some higher rated B’s.  
I had the feeling of being slightly pulled by the back…I think the older Rise 3 was giving me a good headwind penetration…
Facing the Valley breeze, pushing the bar still feels a bit glued even loaded at the top.  But surprisingly, as soon as I found myself in the higher layers, away from the wind effect, the Rise 4 really climbs very well matching the best ones! 
Doing some glides in smooth air, next to the best high B’s of the moment, I could only say that the Rise 4 is truly impressive, with a glide that matches the best ones in that category.

Pushing the bar with pulleys overlapping, I found some 11 km/h over the trim speed at 1000 ASL. I also felt that the leading edge flutters a bit and looses slightly some pressure in a slight turbulent air, but the reactions if I kept pushing and pushing hard on the speed bar is a soft collapse from one side that opens very quickly, like an A glider. 
Inducing some frontals, the rise 4 makes a slight horseshoe but recovers also very fast. Overall it feels less demanding than some 5.4 AR high B gliders in their reactions after a collapse. 

Ears are fairly stable, reopens after 3 seconds with no intervention. 

Conclusion: The difference between the Rise 3 and 4 is that the Rise 4 feels much more comfortable and easier to handle. 
I could describe the Rise 4 as an agile high B glider, with top-end glide efficiency, and great comfort. If only it could have more pitch into the airmass… but probably other sizes may differ. 
With an aspect ratio of 6, the comfort level is high on the Rise4. I have to add that the authority on the brakes is very good on that glider delivering a nice pleasurable feel while circling in thermals.