Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors
  #1  
Old 03-08-2008, 11:12 AM
sail4evr sail4evr is offline
Junior Member
 
Join Date: Mar 2008
Rep: 10 Posts: 7
Location: US
12- 13 ft Catamaran RIB w/hydrofoil

Does anybody know of any current/active builders of this type? This is a powered dingy/tender Not a sailboat

Last edited by sail4evr : 03-12-2008 at 09:05 AM. Reason: misunderstood
Reply With Quote
  #2  
Old 03-08-2008, 03:57 PM
Nojjan Nojjan is offline
All thumbs...
 
Join Date: Sep 2006
Rep: 30 Posts: 107
Location: North Europe
I am sure you have seen the Professor KG Hoppe's HYSUCAT concept, smallest built is around 20ft or so but as small as 12-13 ft sound like taking it too far down in size. It will of course work to some extent but I wonder for what load?
Reply With Quote
  #3  
Old 03-09-2008, 12:22 AM
sail4evr sail4evr is offline
Junior Member
 
Join Date: Mar 2008
Rep: 10 Posts: 7
Location: US
I don't really understand your response. I have seen hydrofoils under a chair being towed by a water ski boat. I've seen 10 ft moths, a sailboat on hydrofoils, what is different about a 13 ft boat with hydrofoils? Load should be around 900 kilos.
Reply With Quote
  #4  
Old 03-11-2008, 01:34 AM
Meanz Beanz Meanz Beanz is offline
Boom Doom Gloom Boom
 
Join Date: Jun 2007
Rep: 585 Posts: 2,286
Location: Lower East ?
That sounds heavy ! My 24' cat is 900kg and I wouldn't like your chances of getting it up on foils. Moths are as light as a feather and sailed by scrawny fit young lads, not a craft for everyone. I think all that Nojjan is saying is its probably easier to get the numbers to work with a little more size to offset the crew load. The smaller you go the tricker that gets.
Reply With Quote
  #5  
Old 03-12-2008, 02:40 AM
Nojjan Nojjan is offline
All thumbs...
 
Join Date: Sep 2006
Rep: 30 Posts: 107
Location: North Europe
Thanks MB, that is somewhat clearer than my reply I guess. Yes, a 900kg square block of concrete can be made to run on hydrofoils, but under what conditions ;-), I'm sure that chair was nice and dry when they decided to stop.

Any-who, if it is intended to be practical (maybe not in the scoope here) I would aim at a larger size. Note some of the findings from Hoppe, smaller HYSUCAT's are much harder to balance (LCG sensitive).

But I don't want to dampen your spirit, please continue with your project.
Reply With Quote
  #6  
Old 03-12-2008, 03:00 AM
sail4evr sail4evr is offline
Junior Member
 
Join Date: Mar 2008
Rep: 10 Posts: 7
Location: US
So I gather that hydrofoils are not competitive in weight carrying capabilities with a traditional RIB inflatable of 13 ft (3.8m)? Many of which exist in the combined weight plus load of 900 kg. Is that right?
Reply With Quote
  #7  
Old 03-12-2008, 05:22 AM
Meanz Beanz Meanz Beanz is offline
Boom Doom Gloom Boom
 
Join Date: Jun 2007
Rep: 585 Posts: 2,286
Location: Lower East ?
I'm talking about sailing boats, if its a power boat and you chuck enough horsepower at it and yeah I am sure its possible. Still sounds like alot of weight in a 13' craft to me, but if you say so... beyond my experience. I could not say much more than that
Reply With Quote
  #8  
Old 03-12-2008, 09:09 AM
sail4evr sail4evr is offline
Junior Member
 
Join Date: Mar 2008
Rep: 10 Posts: 7
Location: US
Sorry for the confuision. I'm looking for a 12.5-13 ft dingy/tender hydrofoil for my 44ft sailing catamaran
There are lots of rigid bottom dingys out there with a combined weight plus payload around 900 kilos.
Reply With Quote
  #9  
Old 03-20-2008, 03:11 PM
Steve Martin Steve Martin is offline
 
Join Date: Feb 2008
Rep: 10 Posts: 2
Location: Michigan
Not a CAT and not with a hydrofoil, but you may like it. Have a look at http://www.africancats.com/boten_inf.asp?boot=48 and then click on "CATALITE RIB Specs" under Specifications. Built by a sailboat maker.

Have a look at http://www.duxboats.com/dux_inflatable_boats.html
The dinghy http://www.duxboats.com/d300specs.html doesn't meet your payload requirements but http://www.duxboats.com/pd400specs.html has a payload of 825 kg (1820 lbs). If you're on the west coast, use http://www.duxinflatableboatsofcalifornia.com/ instead
Reply With Quote
  #10  
Old 03-20-2008, 05:52 PM
sail4evr sail4evr is offline
Junior Member
 
Join Date: Mar 2008
Rep: 10 Posts: 7
Location: US
Hi Steve,
Thanks for the links. The dux boats are nice, but very expensive. I have seen similar at http://www.amiboats.com/Advanced%20C...I%20Boats.html
maybe $2,000 less.
Reply With Quote
  #11  
Old 12-29-2008, 04:49 PM
royalray royalray is offline
Junior Member
 
Join Date: Apr 2005
Rep: 10 Posts: 11
Location: UK
hysucat 5 mtr

Hi
Try Watermarque Marine Ltd on www.worldwatertaxis.com thye have teamed up with Malan Conradie and Globally market the Hysucat range now they do have a small Cat foil tender or try www.hysucatstore.com
Reply With Quote


  #12  
Old 12-29-2008, 05:48 PM
Doug Lord
Guest
 
Posts: n/a
Here is a picture taken of a picture in the latest Seahorse magazine. It is a 49er sailboat hull converted to an outboard hydrofoil by one of the employees at Bethwaite Design in Sydney:
Attached Thumbnails
12- 13 ft Catamaran RIB w/hydrofoil-003.jpg  
Reply With Quote
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hydrofoil Supported Catamaran designs malan conradie Boat Design 51 06-25-2013
09:47 AM 
Prototype Singlehanded Hydrofoil Catamaran Doug Lord Multihulls 2 11-01-2006
08:02 AM 
hydrofoil jejojoy Propulsion 2 08-24-2006
02:08 AM 
hydrofoil Baldur Boat Design 5 06-24-2005
11:06 AM 
catamaran vs rib hilux38 Boatbuilding 3 12-10-2004
09:11 AM 

Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.

All times are GMT -4. The time now is 03:28 AM.


Powered by: vBulletin Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2015 Boat Design Net