LS: Trimaran 75ft

Polar graph for 75ft trimaran (LiveSkipper)LiveSkipper’s 75 ft trimaran is fitted with a stay sail, a solent jib, a genoa, a code 0 and a gennaker. The polar graph shown here is a composite of the full suit.

For use with Bluewater Racing, the .pol file needs the optimum upwind VMG angles and the optimum downwind VMG angles listed in the second and in the penultimate column, respectively. The optimum angles are listed below; convert the polar using my conversion tool and replace the twa2/bs2 and the twa9/bs9 pairs with these values:

twa2	bs2            twa9	 bs9
53	2.2           130	 5.5
45	10.6           141	 12.4
46	10.8           143	 16.6
47	12.8           144	 18.4 
47	12.7           145	 18.1 
45	11.1           145	 19.7
45	9.9             160	 18.6
50	8.9             156	 19.3 

Trimaran 75 ft polar
TWA/TWS	0	6	12.0	16.0	19.0	23.0	27.0	31.0	39.0
0	0	0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
45	0	3	10.6	10.7	12.3	12.2	11.1	9.9	8.0
60	0	4.3	12.8	13.6	15.9	15.8	13.9	11.7	10.7
75	0	6.1	14.9	15.8	18.7	19.2	18.1	16.4	13.3
90	0	6.4	16.3	18.1	21.7	22.3	21.3	19.9	16.2
110	0	6.4	16.5	21.2	22.9	22.9	22.0	21.5	18.6
120	0	6.2	16	20.7	22.5	22.4	22.1	21.5	19.4
135	0	4.2	13.6	18.5	20.5	20.0	20.9	21.3	20.7
150	0	1.5	11	14.4	16.0	16.1	18.1	19.8	20.2
180	0	0.5	6.8	9.3	10.3	9.9	11.3	13.1	13.6

Update: The full trimaran polar suitable for use with Bluewater Racing can be downloaded from here.