I'd agree with comments above. Reducing drag is very important and relatively cheap
I installed Autostream folding 3 blade
props, which add about 1 kt.
As for weight, less is best and it is very easy to lug around lots of stuff you rearely need. Generally, I carry no more than 1/3 to 1/2 fuel
load - there's 400kg. unless heading off shore, I generally do the same with water
- another 600kg, in total 1000kg or an 8% reduction in displacement
just from unneccessary fluids. Some 440's I seen, sit al least 3 inches lower in the water
than mine = significant increased wetted surface area and drag.
When I was racing
Porches, 50kg weight reduction equalled 750HP in terms of improved lap times. One strategy was very cheap
, the other very expensive....
As for "HP" when sailing, it is no different. Laminates are expensive with shortish life and in the context of the boats overall weight and hull
design, are going to offer only very minor gains in speed over new dacron or hydranet. Look out there at "fast boats" and they will be 2/3 the weight, with narrow hulls optimized for drag and not for payload or hull accommodations. Perhaps it is in rather light conditions, say 5-8kts of TWS, when the boat is at distinct disadvantage with its weight, when a Code 0, Screecher, of Gennaker sheeted very tight may well give you a knot ot two advantage to windward.
Bang for buck = folding props + vigilant and aggressive attention to weight.
You can increase the roach on the main a little going from 80sqm std to 83-85sqm, but the boat is already main sail dominant due to the forward mast
position. With a relatively small genoa (42sqm) and mid strength winds, you increase drag because of weather helm
. In fact early reefing of the main (15kts as opposed to reccommended 20kts) is a great idea because you significantly reduce drag with better sail balance and increase speed. Keep in mind however, that the hull design creates limits. Optimizing sails, trim, drag and wieght might give you 10 kts instead of 8kts, but its never going to give you 12-14 at a given wind envelope.