hi there,
thought I better introduce myself i'm a land-locked kite-boarder with time on my hands,if funds ever allow I will build a boat. As a kite flyer thought i'd let you in on a secret. The Vikings had better sails and sailed Proa's. The sails on harry are Marconi,right aspect wrong kite. The sails on Elementary are the right kite wrong aspect.When kite flying you get power from figure 8'ing you can't do that with the kite fixed to the deck.The time you get the most lift is at the launch.People assume higher the sail more the power,if that's so explain the spiniker it's no higher than any other sail yet provides more drive.It's the width not the length that matters,ask ya missus lol.But being female she'll want both.The Marconi rig should be built like http://www.iannewham.com/kitedesign/design.html
The sails should be http://api.ning.com/files/wuqd6jnZ447B6z-TL*zvQ-ZUY39yLmFDKR-Sfqk7aYoBauXbWMn2PzIUAkAb8irOv95w6OnGztYMbO7ylkHyUpNcISKXAEFo/ABOUTSAILS.pdf therefor D shaped easy to handle and lots of power http://en.wikipedia.org/wiki/Lugger
lug rigs were used for thousands of years we know they work,they became unpopular because you had to change them round,not so on a Proa.Size of the sail needn't be as big an area as you have I'd say for elementary try a 6x2 meter sail that's width x height so the guy with the broken masts juts needs to use the spare as a yard to try it out.How'd I come up with the ratio of 3 to 1 see;http://www.vikingage.com/vac/ship_theory.html