Tri Hull Advise needed
I am curious about designing a tri hull for our local “wacky raft race” held here on the mid reaches of the Hudson River. I and 3 co-workers (all with lots of time on the river) were talking about entering this year. Typically entries just need to be homemade; most are some type of raft like structure. This year, we would like to beat everybody!
So here is my idea, Large diameter 16” or 20” PVC sewer pipe with sealed end caps for the center hull, smaller 6” or 8” PVC pipe for the out riggers (I know that there is a proper name starts with an A). I was thinking of using “tee’s” to connect the out rigger arms (spars?) to the center hull. The arms or supports could pass through the center hull and be pretty strong. We have a whole roll of that orange safety fence for the trampoline! I need to think about some type of lee or dagger board and rudder. We have lots of steel and a welder in the shop.
I am thinking about doing a lateen (picture a Sunfish) type of mast and sail arrangement. Mast might be some heavy wall 3” pipe we have and the sail may be a couple canvas drop cloths stitched together.
The race is one way on the outgoing tide so as long as you stay afloat you can finish the race. The prevailing winds will put us on a long reach, almost but not quite straight down wind. It would be really cool if we got a little up wind capability out of it but it’s not that important (if all else fails, we’ll paddle with our uke’s)
I come here asking for any “rule of thumb” advice, hull length vs. mast placement, sail area. Etc. The raft needs to carry four middle aged, balding, fat guys with refreshments about a mile down river as a minimum. As a maximum it could carry us down to the finish, come about and tack through the fleet a couple times. Please let me know if I should abandon the whole idea and start looking for drums to build a raft.
Thanks in advance