Thanks for sharing that knowledge , it isn't often one gets hold of such slippery business !

: I see no advantage to the Sea Rider multi-chine vs the Sea Rider
: single-chine. I was just experimenting when designing
: the multi-chine version.

: Trial and error experience with both single and multi-chine SOF's
: has established a baseline that I use.

: On my boats, I've found that symmetrical single chines up to about
: 17" separation perform well, but
: much wider and they start to feel sluggish in the water. To retain
: an acceptable slope from gunwale
: to chine, my boats that are over 22" wide require a wider than
: I like single-chine separation.
: The standard Sea Tour designs are 22" beam / 17.5" chine
: separation.

: As such, I went to multi-chines on the 24" wide Sea Tour EXP's
: and Sea Bee. On narrower boats like the Sea Rider / Sea Ranger,
: both with 16" chine separation, single chines work great.
: These boats track well, but turn very quickly when edged.

: I can speak only for my own SOF designs ... Your results may vary
: :) Tom