Now why don't I want to run a V Hull at Hull speed. They seem more affordable and a lot less Rolly.
Now why don't I want to run a V Hull at Hull speed. They seem more affordable and a lot less Rolly.
You can absolutely run a vee hull at hull speed. It will not be quite as efficient as one designed for that speed, but it will not be terrible at all.
Like an immersed transom the difference in fuel burn might be 10% 15% worse , but at 1.5 GPH , who could notice?
The ride can sometimes be a lot MORE roll-y depending on sea states and wave direction relative to travel... compared to a hull with a real keel, even more so if compared to a stabilized boat. In these cases, we usually just get on plane. And/or tack.
-Chris
My thinking is to buy a 36 to 44 foot liveaboard V hull if I can't find a trawler I want. We intend do do this every winter from Florida to the islands. What is the draw back other than a little fuel economy more wear on the engines BUT you can go fast if you need to.
Hello: I'm Sam and new here. Thinking of converting a 47 CC Commander (there are many out there on the cheap) to cruise at hull speed with occasional offshore (pick weather).
This is a 35,000 boat with a solid hull and motoryacht room. Will need a keel for directional stability and prop protection. Drop in a couple of Lehman or Perkins 120 to 160HP.
The keel should give some roll damping.
Any thought here?
Sam
Sam's not crazy at all.
But it would be much better if the stern was rebuilt to a full displacement shape. Curved up aft w the transom out or nearly out of the water.
You'll burn 1/3 less fuel and require that much less power. But it will never plane again.
And to be cost effective you'll need to do most of the work yourself.
So.... To liveaboard florida and the bahamas and the islands, a Viking or Hattaras in the 40-44 foot range is a bad Idea?
Firts of all any boat cruising at hull speed is very very expensive. Hull Speed is a sailors concept , enough free wind and even a Tahiti Ketch can do it.
Cruising at SL, (the square root of the waterline) is the usual cheap spot,actually .9 to 1,15 times SL, depending on the boat.Light skiney boats do better than fat heavy roomarans.
Cruising at hull speed, SL times 1.34 will cost at least 2x the fuel, and on many boats 3x the SL fuel burn.
On some lighter boats it is actually cheaper to get up on the plane , where wave making resistance drops , and the nautical MPG goes down.
Puttering about at trawler crawler speeds is fine in an old high speed vessel, just forgetabout hull speed, you cant afford it.