A Sailing Cargo Ferry
Harryproa has an interesting cargo proa concept: an inter-island ferry/cargo vessel for East Timor. The brief calls for 10 tons of cargo and capacity for 25 passengers, primarily (but not only) wind propelled, a crew of 2, shallow draft and beach-able, built and repaired by local semi/unskilled labor with minimal equipment and easily obtained materials, and a large tender.
Naturally, Harryproa has determined that a harryproa is the best platform with which to achieve the above goals.
The loads on the structure do not alter appreciably regardless of whether the long hull is loaded or not. The boat will sail faster when empty, but the loads on the beams and rig are unchanged, saving structural weight.
A point I agree with, see The Case for the Cargo Proa. The solutions presented here are creative and thought-provoking, what do you think?
Much thanks to Paul C. for the submission.