So I screwed up not seeing that Jess was out front - just saw the bigger cats leading - yes, a sterling effort ended sadly and the story would have been very different had she stayed shiny side up.Jess was leading by just some 70nm when it flipped - the 5 top RdR Multis was modern production cats that are sold as racer/cruisers at 50ft. And one Outremer 62 that got in 2nd - weighing in at 16t. No foiling there. If we compare Jess to the 50 tris - it weight 3,7t the winning T50 was 3,9t. Jess downwind SA was more than the winning T50 - and it flipped downwind. OK the C40 boats where some 15% faster than the cats. If we take IMOCA winner + C40 and divide - we get 12d 16h - compared to Tri50 at 10d 21 h - that is 22% faster. The winning C40 has a "normal" bow.
You are right in that the 3.7 ton weight is not great but the complexity of foils adds weight with mixed benefits.
For this race the T50's are filling the retired ORMA spot and are very much state of the art, thank goodness, for the multi banner!
Good spot that the winning Class 40 had a "normal" bow.