Forums > Land Yacht Sailing Construction

Quiz Time

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Created by iand > 9 months ago, 2 Apr 2009
iand
QLD, 243 posts
3 Apr 2009 1:40AM
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I thought I'd ask a question to see who can think outside the box.
Can you design a landyacht that can sail in all directions including directly against the wind (It is possible, I saw a Photo of one thirty years ago)
Ian

hills
SA, 1622 posts
3 Apr 2009 9:05AM
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Hmmm, you'd need some type of windmill type setup giving drive through a gearbox and differential.

lachlan3556
VIC, 1058 posts
3 Apr 2009 11:23AM
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A vertical windmill mounted on the chassis, to provide power to the wheels has been done. Hows this for an attempt?

www.ecofriend.org/entry/wing-powered-racing-dtu-all-set-for-the-windy-race/

When I was tinkering with a little robotics a few years ago (BEAM robotics) I only wanted to use renewables. An idea I had was to have a small turbine mounted of the back of my robot, like a spinaway roof vent, which in turn would drive a dc motor to provide current and charge the things capacitors. Never got around to making it as my interests moved to something else, on the list though.

Going off on a tangent a little; have a look at the wind related works by Theo Jansen. Incredible, although somewhat limited, works of art and engineering. I want a screen saver with these things travelling across it.

iand
QLD, 243 posts
3 Apr 2009 11:13AM
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Congratulations Phil you got it
Lachlan said-"A vertical windmill mounted on the chassis, to provide power to the wheels has been done" as I said Lachlan I was looking at this stuff 30 years ago.

Gizmo
SA, 2836 posts
3 Apr 2009 12:09PM
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A pic from a sailing book 30+ years old
I know its on a water yacht but the ideas there.....
www.treehugger.com/files/2007/02/windmill_sailbo.php


Or there are a couple of rotor systems.... the"Savonius rotor" or "Darries rotor" invented in the late 1920's or even the sail system on the "Alcyone" one of the Cousteau Society's expedition vessels. en.wikipedia.org/wiki/Alcyone_(ship)

These all might be worth a look on google

lachlan3556
VIC, 1058 posts
3 Apr 2009 1:25PM
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I was just adding a modification to Phills design, not stating that it had already been done. A vertically mounted rotor has some advantages over a horizontal, windmill like design (this may not out compete their flaws though). As Gizmo said, these are usually of the Savonius or Darrieus design.

I couldn't imagine that catamaran design overcoming the force of the wind and friction, to actually move forward. Maybe its for illustation purposes only I have a gut feeling that a better rotor design would be required.

Hiko
1181 posts
3 Apr 2009 6:26PM
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Back in the 80s I saw a windmill powered boat in Whangarei NZ sailing on the harbour
The boat started life as a yacht I believe got converted to a fishing boat, lengthened and then got powered by a windmill .All by the same inovative owner
When I saw it it was going very well
I am sure there will be some info on this craft somewhere as it was very well known. Unfortunately I dont remember its name but it was moored in Parua Bay
and was quite a revelation to the many overseas yachtsmen who saw it

landyacht
WA, 5778 posts
3 Apr 2009 9:23PM
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used to be a small keelboat converted in Rockingham, WA , used a car diff and modified axle , 3 speed holden gearbox. They wouldnt let him race in the cruiser classes due to being able to sail straight upwind.
The yacht had a 2 blade prop on a tower that couldbe rotated to get the optimum angle

cisco
QLD, 10763 posts
4 Apr 2009 3:28PM
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Just be careful when you go forward to drop the pick. A conventional yacht boom has got nothing on one of those blades.

lachlan3556
VIC, 1058 posts
6 Apr 2009 10:37AM
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Sounds like they do work. Surprising what limit the imagination has sometimes, while at other times being a little over confident

aus230
WA, 1618 posts
8 Apr 2009 9:19PM
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Someone was thinking outside of the box on this one. The 36 foot catamaran, Revelation II, is powered by 3 20-foot long carbon fiber propellers on a 30 foot rotating mast. The windmill transmits power to a 6 blade propeller underwater, with the net result that the boat can make way even directly into the wind.

landyacht
WA, 5778 posts
9 Apr 2009 8:38PM
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I dont reckon you would be able to go up on the fore deck if that was working. It would want to be a reall good set up since the hull looks like a high speed set up and the drive system is more like a slower steady , steady type of drive.
I'd certainly want to take one out to sea before signing on the dotted line.
Certainly looks the goods

cisco
QLD, 10763 posts
9 Apr 2009 11:51PM
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Another question for the Quiz Time thread.

Yes it is wind powered but is it still a yacht???

iand
QLD, 243 posts
10 Apr 2009 2:22AM
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Is it sailing if you don't have a sail

hills
SA, 1622 posts
10 Apr 2009 8:39AM
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I think it should be called "milling"

j murray
SA, 947 posts
10 Apr 2009 10:23AM
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is the windmill/blades creating electricity or is it direct drive.
if it were electricity to the prop then an entirely different generator would be better than big blades. ie a wind turbine not unlike a jet engine set up. As one walks around secondhand engineering yards, scrapyards, turbines can be observed, just quietly ticking over on almost nil wind days.
i would recon that on the open water, heaps of juice would be created or at least enough to give headway......joe

j murray
SA, 947 posts
10 Apr 2009 10:24AM
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is the windmill/blades creating electricity or is it direct drive.
if it were electricity to the prop then an entirely different generator would be better than big blades. ie a wind turbine not unlike a jet engine set up. As one walks around secondhand engineering yards, scrapyards, turbines can be observed, just quietly ticking over on almost nil wind days.
i would recon that on the open water, heaps of juice would be created or at least enough to give headway......joe

Hiko
1181 posts
10 Apr 2009 6:33PM
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A search on Google brought up several windmill boats including the one in Whangarei NZ The boats name was "Te Whaka " owned by an engineer named Jim Bates
Apparently the boat proved a little unstable so not only did Jim lengthen it he also split it down the centre and added 2 feet in the middle to increase its beam!



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"Quiz Time" started by iand