My New Dizayn Trimaran

[mirsat]

Piranha20 model , my first dizayn She is like cross18. . My cousin edit at surfcam .

[peterAustralia]

Looks exactly like a Norman Cross 18!

Have you any reason not to buy the Cross 18 plans, and extend the main hull by adding a 2ft plug, or simply place each frame a couple inches further apart to get the extra 2ft length

I have always thought the Norman Cross 18 had superb lines, very hard to beat.

[ThomD]

I wouldn't want to use those amas, they are not efficient, a lot of weight and volume up high and little where it would do good. Not as terrible a design for open ocean where a softer ride can be expected, but not much use for the average 18 footer.