Daniel asks…
what materials should a solar panel and wind turbine be made out of if it is going on a boat?
I’m doing an assignment for science, and this is one of the questions I just can’t find an answer for. Could someone please help me?
adminsta answers:
Hello Ashlea…take a look at this link…
Http://www.analyzemath.com/CircleEq/Tutorials.html
These can be interlaced into the hulls deck or can be rolled into tubes. Formed to fit a shape. As far as the wind generator goes the housing should be PVC all metal should be stainless and the windings and core should be copper. All in a basic weatherproof enclosure. There ya go from the E
Donna asks…
How much extra horsepower is necessary to compensate for wind resistance in my boat?
I am building my own boat. It’s supposed to be a no-nonsense, commuter boat for the Otago Harbour in southern NZ. I am currently considering a displacement monohull with an electric motor, deep cycle batteries, and wind turbine rechargers.
The boat will be about 20 feet long, and I am hoping to use an ex-sailboat (the mast will carry up to five wind turbines of 0.8 Kilowatts capacity each).
The commute is 12km, or about 8 miles, each way, there may be a 3-foot chop at times, and winds of 5 to 20 mph are the norm around here.
Just how powerful a motor do I need?
I’m happy with a speed of 8 to 10 knots, but I would like to be able to do that speed against a strong wind, too.
What would you suggest?
adminsta answers:
I would venture to say that 15 hp minimum, 25 would probably be just right. 7.5 will maintain fwd progress for the most part but won’t hold 8 knots into a headwind or against a tide.
Sharon asks…
What if i straped a wind turbine to the top of a boat?
adminsta answers:
The turbine would generate electricity. But this would also slow down the boat.
Linda asks…
Wind turbine for marine use.?
Suppose a wind turbine is mounted on a boat. The turbine is so arranged that it can rotate and always be pointed directly into the wind. Is it possible for the boat to be navigated forward directly into a head-on wind?
adminsta answers:
Of course, you can always steer into the wind, unless that takes you somewhere you don’t want to go, like into the land.
But you will never get to where you want to go if you always steer into the wind. And why would you do this, if the turbine can be rotated.
But do you think you can generate enough power to power the boat this way? No, not really. If there is no wind, this is like perpetual motion, you will always generate less power than the propulsion uses.
.
Chris asks…
How do engineers erect wind turbines on the foundations for a shallow-water wind farm?
On land, they use conventional methods; cranes.
At sea, the usey barges, crane-boats, etc.
I know that there are numerous wind farms that are built on shallow water (<4-1m). But how does the turbine erection take place? Barges can’t be used right (due to shallow waters)? And keeping transportation aside, how does the cranes work?
adminsta answers:
A well-sized barge draws very little water.
David asks…
Can you explain this Physics situation involving wind turbine?
If a boat was in the water and it had a windmill on top of it facing into the wind and the rotating windmill turned a propeller that was in the water (through any necessary gears), but in the opposite direction, would it travel into the direction of the wind?
You can assume that the energy transfer is 100% efficient from the wingmill to the propeller.
Could you explain this in terms of energy or by newtons laws?
A few other things:
The boat has no air resistance or drag force from the water.
The only forces acting are gravity, bouyancy, components of wind acting on wind turbine, drag from turbine, propulsion from propeller in water, drag on propeller.
I guess in this simplified model all forces would balance?
adminsta answers:
It COULD, but whether it would depends on a number of factors.
Steven asks…
Is there a forum for people who want to build their own wind turbines and generators and stuff?
I am looking for some website or forum where I can discuss the nitty-gritty of making wind turbines and building anything that enables people to go off the grid and build their own boats, heat sources, alternative fuels, all-natural materials, etc.
Would anyone know where to find that?
Thanks.
adminsta answers:
I’m putting together a small wind turbine. Check my web page for pictures, diagrams, and other information.
Http://members.rennlist.org/warren/wind.html
Maria asks…
Windmill powered boat.?
Is it possible to power a boat using only a wind turbine?
adminsta answers:
Nice theory gjmb1960, try explaining it to the owner of this ship:
http://foxxaero.homestead.com/indrad_007.html
It’s powered by a wind turbine and it works well.
Your theory had a little error in it. You forgot that the wind resistance will increase exponentially and not linearly with increasing speed.
The wind turbine will indeed get more wind and turn faster as the boat gains more speed but you don’t get a perpetuum mobile. With increasing speed the resistance increases more then the power you get from the wind and eventually you reach a maximum speed. I think the theoretically maximum is 2 times the speed of the wind.
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