The Mac26x hull design is displacement like in the bow but is a planing hull further aft. Hence by moving crew aft and reducing heel to 10 to 15 degrees it is possible to break out of displacement mode and reach planing speeds.
Is this true? Is it better on a Mac to get weight in the stern? On my last boat (Matilda 20), they said the last thing you wanted was weight in the stern.
On a Mac , a bit of weight aft seems to help quite a bit when sailing, although it seems to be a disadvantage when motoring (where it promotes plowing rather than planing in my experience). I've not experienced planing under sail and there have been long discussions about it on this board. I accept that it can happen when running with a large chute under high wind and low sea conditions, but it's not something you can expect to be able to cause to happen routinely.
The Mac26x hull design is displacement like in the bow but is a planing hull further aft. Hence by moving crew aft and reducing heel to 10 to 15 degrees it is possible to break out of displacement mode and reach planing speeds.
Is this true? Is it better on a Mac to get weight in the stern? On my last boat (Matilda 20), they said the last thing you wanted was weight in the stern.
Thoughts?
For those of you who might br relatively new to this site.Frank Mighetto has quite a history.Please be cautious with any iformation you get from hom or his website.Far more knowledgable members than I have called him everything from dangerous to an internet troll. However I think his maX26X sailing Anarchy shows he has a sense of humor
Raising the motor out of the water and moving the kids (load) around, you can feel the boat pickup speed and sail/motor better/faster. At slow speed, when they move around below it can steer the boat!
Islandtime wrote:
For those of you who might br relatively new to this site.Frank Mighetto has quite a history.Please be cautious with any iformation you get from hom or his website.
My last boat - a Matilda - has a ridiculously flat and wide bottom, shaped like a canoe. It is one of the few sailboats purportedly able to plane.
With only a 16foot lwl, I was able to get 6.5 knots out of her (that's a full knot above its calc'ed hull speed, and this was no where near well-trimmed or skippered).
jschrade wrote:Raising the motor out of the water and moving the kids (load) around, you can feel the boat pickup speed and sail/motor better/faster. At slow speed, when they move around below it can steer the boat!
True but that hasn't answered my question. is it moving them aft that gives it speed?
I think Jim was referring to macs planing, nt sailboats in general. Getting a knot above hull speed may or may not be planing of course but having planed my Harpoon once, when you do get on plane you see 2x hull speed, my favorite multiplier .
Im a sailor more then a motorer in ive found that having rhe rudder brackets just clear of the water is good trim. However the boat seems bow heavy according to thefactory waterline. Trimmed to the factory waterline she seemed to drag alot of water behind her.
My average speed in 10-15 Is about five knots.
Trimmed like i have the boat the power trim unit is just clear of the water. This was partially in the water when trimmed to the factory lines. Some corrosion was evident because of that. I prefer to have it out of the water all things being equal. I did raise the waterline in the bow a bit and painted over the black waterline stripe.
My boat goes faster if I move weight (and people) forward at WOT. Otherwise it sinks low and doesn't get as high on the water. Plane? I doubt it has ever with a 70hp motor but it definitely goes faster with less weight aft. That's why I didn't put water tanks under the aft berth.
I concur with the weight forward under power. If we are running hard somewhere the Admiral lays down on the front berth and we usually gain close to a knot.
Under sail there are so many other issues, sail trim, swells, idiot captain, current that I am never sure if weight matters much.
Its like moving people aroung in a motor home to get a little more speed on the highway. Not sure its worth the effort. With my 90 Hp on the back I am still the first one to the destination.
, a bit of weight aft seems to help quite a bit when sailing, although it seems to be a disadvantage when motoring (where it promotes plowing rather than planing in my experience). I've not experienced planing under sail and there have been long discussions about it on this board. I accept that it can happen when running with a large chute under high wind and low sea conditions, but it's not something you can expect to be able to cause to happen routinely.
