Originally Posted by wanderlust42
Here's the same polar diagram for Saba 50 along with some supplemental data and polar tables with detailed figures.
It explains why this style of catamaran
motors to windward.
VMG directly to windward in 12 knots is approximtely 3.5 knots.
VMG (DTW) for a Bendytoy First 40 in 12 knots is approximately 5.75 knots.
Begs the question . Why bother with the rig?