The low drag verticals have less area. They are shorter and also narrower in some areas. As a result they are also lighter.
Area and section shape. More area has more drag, but it also lifts the boat sooner in lighter winds. Section shape varies the amount of lift and drag. For heavier air foils the emphasis is more on reducing drag. On lighter air foils lift becomes more important, but not if it increases drag too much. It is always a compromise which is why development will always continue in the quest for more lift with less drag.
Solid wings have some handling advantages and aerodynamic advantages.
Soft wings are lighter.
For bigger sailors, the trade off is often in favour of having a lighter platform, whereas lighter sailors can take the aero gain of the solid wings.
To get the most aerodynamic gain, the deck faring should match or be a little longer than the foot length. Theoretically, longer is better, but it is also hard to sail with. It is no problem to cut down the length of a deck fairing to match your sail should you change at a later date.
The Hi-Top box is needed if you want your solid wings to fit into a box with your boat. Alternatively you can use the standard box and package the wings separately if you don’t travel a lot.
Air freight is charged by volume, so it costs less if you use the smaller box and pack the wings separately. However, this also has its risks, so we recommend the Hi-top box if you are regularly freighting your boat to reduce the chance of your wings being damaged or lost.
Sorry, we can't find and posts.