Up Up and Away

A short update on WASZP performance...

Prototype WASZP’s are now taking off at under 7 knots of boat speed (with 85kg sailors), which is very similar to the seven times World Championship winning Mach2 Moth.

The WASZP is easily hitting 15 knots upwind at a height that is comparable to the Mach2. It appears that the VMG difference is less than a knot and half.

The VMG downwind is only around 3 – 4 knots better than upwind with the WASZP, whereas the differential with the Mach2 is a lot higher.

The result is that you spend a more even amount of time going upwind as you do down in the WASZP. Especially when compared to a classic planing boat where you are slogging away upwind and planing downwind. With the WASZP you are essentially planing all round the course.

Downwind top speeds in excess of 20 knots are being seen regularly.

Most testing has been happening at Black Rock Yacht Club on Port Phillip Bay in Melbourne. This throws up some testing conditions with short steep waves in many wind directions. This can be a challenge which restricts your ability to really push downwind.

So on a day where you might see 22 knots downwind on a Mach2 the WASZP is achieving 18-19 knots. You see more of a difference with the VMG downwind though because the angles aren’t quite as good as the Mach2.

In light airs the boat is really nice through the water. It’s a very slippery shape and the lack of stays really helps downwind (because you can let the sail right out) so it will be fun to race in these conditions, much faster than a Moth.