Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-19-2018, 06:01 PM   #1
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 1,836
Inflatable sail kite, lighter than air to pull boat forward.

I know they have those things.
Simply deploy off the bow, it floats up, and grabs the wind and powers the boat ahead. Might be good when going on a long ocean voyage with the trade winds.
__________________
Advertisement

sdowney717 is offline   Reply With Quote
Old 06-19-2018, 09:08 PM   #2
Senior Member
 
toocoys's Avatar
 
City: Seabrook
Country: United States
Vessel Name: Final Choice
Vessel Model: 1996 Mainship 37 M/Y
Join Date: Oct 2016
Posts: 495
My dock-neighbor has a Island Packet 35 Catamaran, and he often sails it with a parachute in that manner. He has the chute rigged to the mast somehow, and in the right direction, with the right winds, it works perfectly.
__________________

toocoys is offline   Reply With Quote
Old 06-20-2018, 06:29 AM   #3
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 18,057
Most boats do not have the scantlings for "long ocean voyage with the trade winds".


Most of the ones that do are called sailboats.
FF is offline   Reply With Quote
Old 06-20-2018, 09:31 AM   #4
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 6,990
At first I didn't realize what I was looking at as we were leaving St. Maarten several years ago. By the time I got the camera out, she had blown by us. The kite was on a power cat of about 40'. I’ve no idea if it was inflatable or not but still pretty cool.
Attached Thumbnails
Click image for larger version

Name:	A07BD9DD-1779-4C46-B2A4-2A1470B252AF.jpeg
Views:	161
Size:	168.6 KB
ID:	77672   Click image for larger version

Name:	6A5E980D-F8C7-4291-A90D-0A164C934967.jpeg
Views:	141
Size:	120.7 KB
ID:	77673  
Larry M is offline   Reply With Quote
Old 06-21-2018, 06:17 AM   #5
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 18,057
About 50 years ago some one asked the AYRS (Amateur Yacht Research Society) im GB


"what is the most efficient yacht"

Their response was a submarine , towed by a box kite.
FF is offline   Reply With Quote
Old 06-21-2018, 09:15 PM   #6
Veteran Member
 
mcarthur's Avatar
 
City: Canberra
Country: Australia
Vessel Name: Jnet (renaming in progress!)
Vessel Model: Ligure 50' aluminium power catamaran
Join Date: May 2018
Posts: 52
Quote:
Originally Posted by Larry M View Post
At first I didn't realize what I was looking at as we were leaving St. Maarten several years ago. By the time I got the camera out, she had blown by us. The kite was on a power cat of about 40'. I’ve no idea if it was inflatable or not but still pretty cool.
Oceansails still sells them (see Google). We're looking at one for a 50' power cat we're purchasing. Many of the other manufacturers for kites for yachts sem to have gone (Dave Culp etc.). The boat in the pics was almost certainly the Lagoon 43.
mcarthur is offline   Reply With Quote
Old 06-21-2018, 09:59 PM   #7
Master and Commander
 
markpierce's Avatar
 
City: Vallejo CA
Country: USA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 10,986
I suppose it's practical if often one's course is extensively downwind.
__________________
Kar-KEEN-ez Koot
markpierce is offline   Reply With Quote
Old 06-22-2018, 12:51 AM   #8
DDW
Senior Member
 
City: San Francisco
Country: USA
Join Date: Apr 2018
Posts: 472
Quote:
Originally Posted by markpierce View Post
I suppose it's practical if often one's course is extensively downwind.
True flown from a powerboat. OTOH, foiling kite boards are currently the fastest sail powered craft upwind, in VMG.
DDW is offline   Reply With Quote
Old 06-22-2018, 02:14 AM   #9
Veteran Member
 
mcarthur's Avatar
 
City: Canberra
Country: Australia
Vessel Name: Jnet (renaming in progress!)
Vessel Model: Ligure 50' aluminium power catamaran
Join Date: May 2018
Posts: 52
Quote:
Originally Posted by markpierce View Post
I suppose it's practical if often one's course is extensively downwind.
Most of the world cruising is purposely downwind - planned that way for the obvious reasons that it's not great for a power OR sail boat crashing to windward for days on end. It's clearly not true for certain more limited places or latitudes of course.

The claim for that particular kite (or chute) is that it's effective for winds 45 degrees either side of astern. That's a pretty wide range of conditions if you choose your cruising times. Of course with a power boat (nee trawler) you can always just turn on the engines, catering happily to the percentage of time the wind isn't blowing, is blowing too much, or isn't blowing in the right direction, or when you simply want to hear that deep rumble and smell the diesel . Each to their own .
mcarthur is offline   Reply With Quote
Old 06-22-2018, 02:58 AM   #10
Guru
 
City: Doha
Country: Qatar
Join Date: Jun 2012
Posts: 845
Seems like an excellent item to keep for emergency propulsion for single engine boats. Even if it only pulls your 50ft trawler at 1 knot that certainly is better than sitting dead in the ocean.

Someone on this forum has to own a kite board - it would make a great experiment to see how well your trawler is pulled along.
makobuilders is online now   Reply With Quote
Old 06-22-2018, 09:32 AM   #11
Guru
 
OldDan1943's Avatar
 
City: Aventura FL
Country: USA
Vessel Name: Kinja
Vessel Model: American Tug 34 #116
Join Date: Oct 2017
Posts: 2,402
Quote:
Originally Posted by makobuilders View Post
Seems like an excellent item to keep for emergency propulsion for single engine boats. Even if it only pulls your 50ft trawler at 1 knot that certainly is better than sitting dead in the ocean.

Someone on this forum has to own a kite board - it would make a great experiment to see how well your trawler is pulled along.
My "emergency power" is the (3)VHF radio or Cell phone or Sat phone.

On a 34ft trawler, there isn't much room to store 'stuff'. If I had a bigger boat, I would take stuff out of the store room and put it on board.
__________________
And you folks thought I knew what I was talking about?
I do believe my intuitive gene has died.
OldDan1943 is offline   Reply With Quote
Old 06-22-2018, 10:04 AM   #12
Guru
 
MurrayM's Avatar
 
City: Kitimat, North Coast BC
Country: Canada
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 4,184
Quote:
Originally Posted by OldDan1943 View Post
My "emergency power" is the (3)VHF radio or Cell phone or Sat phone...
Lots of boats on this coast have 9.9hp outboard kickers on the swim step...no tow service and the nearest boat might be over four hours away.

Long inlets with inflow/outflow winds would make a kite useful, but raises a few concerns.

We used to use a parafoil kite to pull our sea kayaks. It was fun with 20 knot winds but a white knuckling experience at 25 and over. A knife at the ready to cut the line was a blatantly obvious idea. On a trawler you would have to have some sort of quick release mechanism to cut the kite loose in emergencies.

Also, if the kite is taking some load off the engine, would this have any negative effects on the engine if you were running downwind all day?
__________________
"The most interesting path between two points is not a straight line" Murray Minchin
MurrayM is offline   Reply With Quote
Old 06-22-2018, 12:18 PM   #13
Member
 
City: Fort Myers, FL
Country: US
Vessel Name: Maya
Vessel Model: American Tug 34
Join Date: Nov 2013
Posts: 5
There was an episode of “The Last Ship” where they used kites to sail the ship.
__________________
David Hipschman
Skipper of M/V Maya, an American Tug 34
U.S. Coast Guard Master, including Auxiliary Sail
Don't think every island is discovered.
dochip is offline   Reply With Quote
Old 06-22-2018, 05:46 PM   #14
Senior Member
 
wkearney99's Avatar
 
City: Bethesda, MD
Country: USA
Vessel Name: Solstice
Vessel Model: Grand Banks 47 Eastbay FB
Join Date: Feb 2018
Posts: 318
Quote:
Originally Posted by MurrayM View Post
...Also, if the kite is taking some load off the engine, would this have any negative effects on the engine if you were running downwind all day?
There's the potential of problems with the cutlass bearing and transmission if the prop is left spinning without the expecting cooling/lubricating circulation that might otherwise occur when under engine power. I'd imagine this varies from one design to another, but it'd be something to confirm before incurring repair expenses...
__________________
-- Bill Kearney
2005 Eastbay 47 FB - Solstice
wkearney99 is offline   Reply With Quote
Old 06-30-2018, 08:54 AM   #15
Member
 
City: Antalya
Country: Turkey
Vessel Name: Möbius
Vessel Model: Custom Expedition Passagemaker under build
Join Date: Aug 2016
Posts: 20
The big guys use them for fuel savings




https://www.skysails.info/index.php?L=1
ChristineKling is offline   Reply With Quote
Old 06-30-2018, 03:40 PM   #16
Senior Member
 
Group9's Avatar
 
City: Bay Saint Louis, Mississippi, (or where the anchor drops)
Country: USA
Vessel Model: 1973 42 Bertram MY
Join Date: Sep 2013
Posts: 488
Quote:
Originally Posted by markpierce View Post
I suppose it's practical if often one's course is extensively downwind.
That's the way sailors try and do it. Beating to windward is not much fun in anything.
__________________
Living life at one quarter speed.
Group9 is offline   Reply With Quote
Old 06-30-2018, 08:31 PM   #17
Dauntless Award
 
Wxx3's Avatar
 
City: New York, NY
Country: USA
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,516
The utility is far less then it seems.

The wind is seldom that steady. It may seem so, but with a wind instrument that has max and min telltales, one can see that even "steady" at 20 kts, will have a range of maybe 5 to 25 over time.

For a power boat, when the wind dies suddenly, running over your kite, will kill any advantage you gained.
__________________
Richard on Dauntless,
New York

a Kadey Krogen 42 Currently https://share.delorme.com/dauntless
Blog: https://dauntlessatsea.com
Wxx3 is offline   Reply With Quote
Old 06-30-2018, 09:04 PM   #18
Guru
 
MurrayM's Avatar
 
City: Kitimat, North Coast BC
Country: Canada
Vessel Name: Badger
Vessel Model: 30' Sundowner Tug
Join Date: Jul 2012
Posts: 4,184
Quote:
Originally Posted by Wxx3 View Post
...For a power boat, when the wind dies suddenly, running over your kite, will kill any advantage you gained.
And then there's all that line in the water that you're about to run over with a heavy water filled bundle of fabric at the end of it.
__________________
"The most interesting path between two points is not a straight line" Murray Minchin
MurrayM is offline   Reply With Quote
Old 07-01-2018, 12:00 AM   #19
TF Site Team
 
dimer2's Avatar
 
City: Houston
Country: USA
Vessel Name: Baobab
Vessel Model: Bayliner 4788
Join Date: Aug 2013
Posts: 2,538
For those on another thread that wanted to know how to stop "hunting" at anchor, this may be a solution (flown aft)
__________________
I'd like to live like a poor man....only with lots of money
dimer2 is offline   Reply With Quote
Old 07-02-2018, 03:49 AM   #20
Veteran Member
 
mcarthur's Avatar
 
City: Canberra
Country: Australia
Vessel Name: Jnet (renaming in progress!)
Vessel Model: Ligure 50' aluminium power catamaran
Join Date: May 2018
Posts: 52
Quote:
Originally Posted by Wxx3 View Post
The utility is far less then it seems.

The wind is seldom that steady. It may seem so, but with a wind instrument that has max and min telltales, one can see that even "steady" at 20 kts, will have a range of maybe 5 to 25 over time.

For a power boat, when the wind dies suddenly, running over your kite, will kill any advantage you gained.
While true at sea level and near, it is not true at a height above (100-200' for example) the water. It is usually remarkably more clean, although it may also be in a different direction and a very different strength! Your windspeed indicator is useless at gauging this (unless you have a remarkably high mast ).
__________________

mcarthur is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 03:44 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012