Sunday, November 16, 2008

the next iteration:
bow higher, aft deck convex, aft wing struts... strutting, gantry (not fully thought through) more kingpost rake to resist max loads (12 deg), decision made not to slope the transom because i couldnt get it to look cool (tiny transom anyway, might revisit this) tramp not updated re. filling holes slightly.
Still not sure about the volume / freeboard, im inclined to thing there is too much at the mast, (450mm to top of deck) yet to measure a bladerider for comparision.


Karl said...

New renders looking nice.

Alex Adams in the UK did a kingpost like the one you are planning on his current boat. I think it is broader fore/aft at the bottom, which lands on the bottom of the hull, than at the top. From what he said it is very beefy.

Though the hull looks like a very nice planing form I wonder if that is really appropriate for a foiler moth, because the boat is flying long before it would ever start to plane I think. It just seems like you want the most slippery hull shape you can get up to eight knots, and the bow chines when submerged are bound to create some drag.

Of course there is the crash recovery mode and the nice pointy bow and forward chines should help to avoid planting the bow too hard.

Like the convex deck - I think that's actually the way to go with low freeboard because your center of gravity is still probably a lot lower than my Prowler4 and you have something to push against on the windward side of the boat, rather than down to leeward. Gui's Guillotine design is an inverted V all the way forward - you could probably sail it upside down if you wanted to build it that way.


nick flutter said...

hi karl
all good points. i went searching for alex's kingpost and it looks something like what i want. it is chunky!
the deck is still under development but i think the finished configuration will be quite similar to what i have now.
i cant find Gui's design, but i think i know what you mean.
Im just going on a hunch with the hullshape. the actual lines are proven to be good, and in going even further down the planing road i understand there will be some light air drawbacks. but from experience i think the most important thing is to have low hump drag at takeoff, to allow you to get airbourne in as little breeze as possible and as quick as possible, and this is pretty complex with the 'foil assist' mode etc. im just interested in trying something different really.

phillippe oligario said...

Nick this design looks extremely sexy! When do you think you will be building it? You must make sure you take photos and update your blog regularly when you do! I look forward to reading about it as it happens!

Phil at