Can not the HP carry a larger sail, compared to the tri, assuming similar margins of safety?
Is not the hp in this comparison assumed lighter than the tri?

Would not larger sail and lighter weight favour the HP in light airs?

Or is wetted surface the larger variable?

On March 2, 2019 10:35:57 PM UTC, "Rick Willoughby rickwill@bigpond.net.au [harryproa]" <harryproa@yahoogroups.com.au> wrote:
| The difference in wetted surface between proa and tri will not be 40%
| in light conditions but something less than that. There needs to be
| a reasonable immersed length of the ama to avoid wave making drag.
|
| Then the tri has the windage of the windward ama and its beams. That
| is not insignificant.
|
| The light air performance is likely to favour the tri but it would
| require detailed analysis to assess the difference.
|
|
| Rick