Below is a video of the RapidUp Sail:
The following site has a very nice description of the RapidUp sail:
Installing the Rapid Up sail on my Pathfinder was easy. The Pathfinder has 4 D-rings at exactly where the RapidUp's attachments are. Here is how it looks installed on my Pathfinder. Even if your kayak only has 2 D-rings, the two clips on each side can be length adjusted to attached to a single D-ring.
Having had some experience with the Advanced Elements RapidUp Sail, here are my observations:
- The Rapid Up sail is best used for going directly downwind. However, it can travel nearly cross wind, as long as there is some downwind breeze to catch. Unlike a sailboat, which goes faster cross wind, my Pathfinder rigged with a RapidUp sail will travel slower cross wind than downwind.
- If you are looking for a sail that make you go faster than the other kayakers, or experience exhilaration like you do when windsurfing, this is not the one. The problem is the flexible frame inside the sail. As easy as it is to fold up, in winds higher than 12 to 14 MPH, the RapidUp starts to bounce around and the top edge starts to curl down. The flexibility need to fold the sail causes the frame to give in higher winds. So you don't really go faster in winds higher than 14 MPH. In similar strength cross winds and high chops, the Rapid Up sail gets pushed down into the water by the wind and causes extra drag. Others have mention that it is not easy to close the sail in high winds and I agree.
- The Advanced Elements Rapid Up sail can be best categorized as a muscle offload device. In around 8 to 10 MPH wind, the sail alone will cause my Pathfinder to travel at 1 to 2 MPH. This provide noticeably easier paddling effort to achieve 3 to 4 MPH, which is the speed of an intermediate kayaker. I have also figured out how to use the kayak paddle as a rudder by keeping it always in the water and steering with it. This makes slow travel downwind possible without any padding, which is pretty cool. I am sure other more streamlined kayaks will go faster with the RapidUp.
- The beauty of the RapidUp sail over other downwind kayak sails such as the WindPaddle (http://www.windpaddle.com/) is that the RapidUp is completely attached to the kayak, thus freeing your hands to paddle or steer.
- The greatest feature I find of the Rapid Up sail is that it can be folded up easily while going upwind. Along with the negligible weight of the sail, taking the Advanced Elements RapidUp Sail out on each and every paddle is a no brainer!
For a portable sail kit that can go upwind, check out Sailboats To Go (scroll down on the site to see the various models):