Terminology

[kach22i]

It's from a RC boat model site, but has excellent definitions and graphics.

http://www.rcboataholic.com/hulls/hullsdef.htm

Example:

Strake: Flat riding surfaces that run the length of the hull. Typically there are two outer strakes and an inner pair. Mainly found in Deep-vee type hulls they may also be found on some cats. The strake provides a small planing surface, the outer pair for low speed planing and the inner pair for higher speed.

Great little site.

[safewalrus]

And I always thought a 'strake' was a loony word for a plank! You'll be telling me a "bucket and chuck it" is another name for a 'head' next!

[SailDesign]

walrus, to stinkpotters, a strake is something different to those of us with real boats. A strake is still a plank, ignore all other misunderstandings
Steve

[safewalrus]

Sails thankee kindly thought I was loosing it a little!

[wdnboatbuilder]

In a hard chine boat i have heard the turm of a running strake (also known as a lifting strake) which is what you are showing in the picture but sure seems to me that the piece to the out side of the running strake seems detramental to the performance. I believe in school somewhere i had heard that this strake should not have more than a 5 degree angle and has been a rule of thumb for me granted that is only in the pointy end and should run flat in the flat end