Under the perspective of overall efficiency regarding a modern hull and its continuous evolution towards a better performance and again about Marc-Oliver von Ahlen designs, it is very interesting to compare that beautiful classic coastal cruiser recent design that I have posted recently, this one:
With an older one by the same NA and look at the differences in what regards that evolution in what regards hull efficiency:
Both have already modern efficient keels and rudders and being classic boats the hull has to be compromised in what regards pure efficiency since the aesthetic factor is a major one here but as we can see, without compromising the looks the hull of the last design (first picture) is a more efficient one, more in line with what that hull would have been if the aesthetic factor was not a major one.
We can see also that the overall looks were not compromised:
That's what makes a great design
In what regards hulls not compromised by that type of factors and that therefore are designed mostly with performance in mind we can look at two designs from the same NA separated by some years and with about the same program (performance cruisers) and look at the hull evolution towards an overall better sailing performance.
Look at the differences:
And that is on line with the last year's evolution as it can be seen on the work of all top Nas: Both boats have modern rudders and keels but we can see that the bulb on the last boat is a more elongated one and that the last boat has a two rudders set-up with two wheels (only one on the previous boat).
We can also see that the 60ft is proportionally slightly beamier and most of all has the beam pulled aft. That difference in beam is relevant since the last one is a bigger boat and bigger boats are normally proportionally less beamier than smaller ones.
Aesthetically the boat also features the modern tendency for very low cabins (as we could saw here on many boats, including the Wally, or the new big Hanse) being the illumination (lot's of it) made through port hulls or Zenithal.
All these designs are not very separated in time, a decade at most and we can see clearly the design evolution. Decidedly a very interesting Na, Marc-Oliver von Ahlen and one that follows closely contemporary design evolution that it is faster now than never before.