Recent content by PetterM

Thanks, looks like the SNAME server is down at the moment.

Hi, Does anyone have this paper as pdf? Blount, D.L. and Hubble, E.N., Sizing Segmental Section Commercially Available Propellers for Small Craft, SNAME Propeller Symposium, 1981. Best regards, Petter

Very interesting reading. I have also found the Rose and Kruppa/ Ferando et al papers quite useful. I suspect the commercial style propellers tested by Rose and Kruppa/ Ferando et al have much thicker blade sections than what we use on fast offshore boats. I am not familiar the with Brandt...

here is a couple on more commercial style SPP's: http://www.icmrt07.unina.it/Proceedings/Papers/c/44.pdf http://www.rolla-propellers.ch/Rolla/Papers_files/Surface_piercing_propellers-Methodical_series_model_test_results.pdf

Did Edmond Bruce publish any of his work?

Thanks Leo, will try this.

I am looking for resistance data/prediction methods for very slender hulls, with length/beam ratio of around 20 and Froude number of up to 0.8-1.0. Anyone?

Hehe, that’s quite an understatement ;) Think they work well now though.

There was a recent series Sea Lord being built, this time also by Båtservice in Mandal, but this time in carbon fibre sandwich: http://www.batservicemandal.no/vessels/item/35-m-carbon-catamaran-sollifjell

Hi Joe, Its all in the mindset. I am island of Stord at the moment on the west cost;) Petter

From memory Brødrene Aa made a SES with an Escher-Wyss prop, but this was before my time. Would be very interested in seeing the open-water curves if these are shareable.

It not become a product for many reasons, but the technology had significant potential gave nice mix of high-speed efficiency and low speed manoeuvrability for the narrow market sector that needs this. Leif Magnus Endresen has retired by the time I joined Servogear but he still came around...

Hi Joe, The Berserk Design (and the web site) is on the back burner for the time being. At Berserk Design I exclusively do high performance boat design, stepped hulls calculations, aerodynamics CFD etc etc, I am still serving existing customers but actively seeing new ones. Lately I have...