Over the past year Neil Kennedy had been digging into his vast archive of magazine articles and sending them along to Earwigoagin. These two articles about the introduction of the plywood frame and stringer construction in the 16 footers I find particularly interesting. The 16-footers may be considered the baby brother to the 18-footers but, as Neil points out, in the late 1950's and 1960's they were developing faster than the 18-footers. The Australians (in the 16-footers, the Western Australians) were the leaders in pushing lightweight frame and stringer construction for their performance classes.
Even back in 1959 the plywood they used for the 16-footers was 4 mm., which is really light for what is essentially an open boat. As a comparison, most plywood International 14's of the 1960's (there weren't many - most were cold molded designs) used 6 mm. On Evelyn, the 16-footer, I count twelve stringers over the hull bottom (plus the center plank).
You see a similar surfeit of fore-aft stringers in "Vitamin C", one of the last plywood champion
12 foot Cherubs of the early 1970's.
Photo courtesy of Andrew Chapman
"Vitamin C" on a ripping tight spinnaker reach.
Photo courtesy of Andrew Chapman