Hey David..thank you for mentioning the other two "strange" paddlers of the "Bessemer" era, "Castalia" and "Calais-Douvre."
By the way, some of you might have noted the extremely low prow/stern of "Bessemer". This was to allow her to plunge through waves rather than lift over them, essentially to reduce pitching in a heavy sea.
Imagine the heart stopping impact of a "green one" on her superstructure!
For Eddy and everyone else who would like to see the catamaran hulled "Castalia", (my favourite of the trio) here she is. By the way, she was regarded as a total failure for as author Richard Clammer states, "not only was she a very poor seaboat, but she was also only capable of 11 knots"
And as for handling...one can only imagine the nightmare!
PJ
Victoria, BC Canada