These are the polar performance diagrams for the four boats tested in 2018.

The codes after the boat name in the title indicate what filtering has been applied.

S7 means any data points where the wind speed drops by more than 0.7 knots per second are omitted

A64 means that any data points where the wind direction changes by more than +6 degrees or -4 degrees per second are omitted

Avg3 means that the speed shown is the average of the top three boat speed values recorded for each wind direction and wind speed

No correction has been made on these results for downwash affecting the wind sensor, which was placed on the quarter of each boat, which may be why the upwind performance of some of the boats is better than would normally be expected. Results which will have an arbitrary 10 degree correction at 35 degrees, tapering off to 0 and 70 degrees, will be added shortly. These will have a code C70D10 attached.

No adjustment has been made for the length and sail area/displacement ratios. These will be added at a later date. 

No smoothing has been applied to these curves. The big dips and the gaps in the curves are caused by the limitations of the data recorded. We may apply some smoothing at a later data to bridge the gaps and to bridge across the dips.

 





       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

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