Hydrofoil Supported Catamaran designs

Discussion in 'Boat Design' started by malan conradie, Feb 3, 2008.

  1. Bullshipper
    Joined: May 2008
    Posts: 106
    Likes: 2, Points: 18, Legacy Rep: 21
    Location: Mexico

    Bullshipper Bullshipper

    It is my understanding that stability and wandering off course have always been the main problems associated with adding foils. It is also my understanding that professor Hoppe performed a lot of pull tank tests before he could get his 24 to run right.

    I can see them to improve inefficient heavy large hulls, but have always wondered about the claims of 40% improvements, especially on smaller planning cat hulls that are already pretty efficient to begin with.
     
  2. northerncat
    Joined: Jan 2007
    Posts: 170
    Likes: 1, Points: 0, Legacy Rep: 9
    Location: australia

    northerncat Senior Member

    i thought it was the fact that you used assymetric hulls that allowed the boat to bank like a monohull as any assymetric cat will not the foil??
    sean
     
  3. RSALVAREZ
    Joined: Oct 2007
    Posts: 31
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: baja california

    RSALVAREZ Junior Member

    Hello, i have a question about hydrofoils, i have a 1978 23 foot deep V hull boat with a V8, and this morning i am looking information about the posibility to install in the planing surface of the boat hydrofoils to reduce drag (creating lift) i have an small water chanel were i test propellers (pwc mechanic is my work) may be i can calculate many small wings to distribuite under the hull and test their lift/area/speed relation, or may i can but the foils and attach? i see old designs of attach on hidrofoils but this tread is more related, thanks
    based on wing lift calculations?
     
  4. MLTech
    Joined: May 2008
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Vietnam

    MLTech New Member

    Dear friend, can you provide me some design for water jet application.
    At present we got one package of boat for Vietnam navy which equipped with Inboard Engine and Water Jet ( Scott or Doen)
    If you got any boatbuilder in South East Asia is your licensee, we can contact them.

    Thank you
    ML Tech ( my email : tech@mlmarine.com)
     
  5. duae
    Joined: Aug 2004
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Istanbul

    duae New Member

    Desingsn and molds

    Dear Malan,
    I am very interested to buy your desins and molds, or if you interested,
    we can discuss producing your boats in Turkey.
    Please reply to duaeski@yahoo.com.tr +90 554 3014597.
    Waiting for your reply.
    Regards
    Dua eski




     
  6. Fanie
    Joined: Oct 2007
    Posts: 4,603
    Likes: 170, Points: 63, Legacy Rep: 2484
    Location: Colonial "Sick Africa"

    Fanie Fanie

    Hello Malan,

    I was set to go fishing on one of your Hysucats off CT in December but you Capetonians ordered 40kn winds for the time.
    Now that I think about it, the wet freezing (less than 2 inches) snowy weather we have to endure currently must also be coming from you guys :D

    Our host for the missed trip liked his boat... had good things to say about it.
     
  7. AlexHRG
    Joined: Aug 2009
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Hurghada, Egypt

    AlexHRG New Member

    Hello,

    I hope i can still reach mr. Conradie as this post is dated over a year ago...

    There is a project going on where his designs might be perfect for, so I'm extremely interested in buying some designs..

    Preferably i would like to have a talk with him about the feasability of modifying the designs "just a tad" :D


    I've found this website & forum just some days ago and i'm literally tearing it apart for any usable info about all kinds of propulsion systems in conjunction with hydrofoil boats, i'm sure you'll understand my interest when you see my website.

    As a little background info, i'm mostly an Automotive engineer but i got thrown into the boat branch very abruptly and thus i have to learn things very very fast. We've had some major issues with our boat and luckily we've sorted them out with advice from others, consulting a lot of manuals, articles, well-reasoned "guesstimates" and just plain logic sense.

    Now is the part coming to re-design this boat and make it really perfect for it's intended use, which is:
    -heavy duty commercial
    -prolonged time in very salty waters

    .... well, i hope this clarifies it for all parties and i repeat, i would be incredibly thankful (if not lucky!) if mr Conradie replies to this post.

    Alex
     
  8. sunrisemarine
    Joined: Jun 2006
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Australia

    sunrisemarine New Member

    Dear Malan, May I be an agent for Asia, please? Buy 2 of your design too.

    Dear Malan,

    A –
    1) May I be an agent for your Hysucat designs into Asia, please? I would like to introduce them into Asian countries by multi Asian languages & English website. You design/consultant, I am your marketing agent/project manager, I will try to look for company/investors too.

    I can layout the website, have the website programmed by professional company, modify & upload the information within 3 – 4 months.

    I will do all of the above at my own costs. We will discuss the share of any profit in details & in back & white in the future.

    2) I would like to buy your design of the;
    Hysucat 21' Rib standard/leisure.(twin 50-70hp single 90-140 -55knots)
    Hysucat 26' Rib leisure/racing. (twin 70-150hp single 115-250hp -72 knots)
    Produce them in Asia (which I already have a few manufacturers) as they are,
    marketing them to lot of Asian countries, Australia & USA (which I already have lot of contacts).

    3) I would like your assistance to convert the deck that we bought HULL in 2) to convert them into ;
    Hysucat 21' Rib standard/leisure. (twin 50-70hp single 90-140 -55knots)
    Your assistance to convert it to small water taxi, some modifications, & the foil modifications.
    Hysucat 26' Rib leisure/racing. (twin 70-150hp single 115-250hp -72 knots)
    Your assistance to convert it to large water taxi/Ambulance Hysucat/small ferry, some modifications, & the foil modifications.
    I will produce & market them as in 2). The weather in Asia is really hot, the roof need to be well insulated, air conditioning system if possible, tinted glass windows, toilet if possible.

    4) I would like you to also convert the DECK, some modifications, & the foil modifications;
    Hysucat 25' centre console, sport cruiser. (twin 90-140hp - 52 knots)
    Convert it to river small ferry.
    Hysucat 42' flybridge and sport cruiser (twin 420hp - 11.5ton -50 knots)
    Convert it to river large ferry.

    There is no Hysucat RIB water taxi, no Hysucat ferry yet.
    Monohull hydrofoil boat mainly manufactured in Russia.
    Until you gentlemen, Prof KGW. Hoppe, Prof Dr Nikolai Kornev,
    Gunther Migeotte, Andrey Taranov , yourself (Mr. Malan Conradie) & a few others in South Africa; researched and manufactured the Hysucraft, Hysucat…etc.
    None of the Asian country can manufacture any hydrofoil boat, nor Hysucat yet. It is a huge potential market for Hysucat RIB leisure/racing, small/large water taxi/Ambulance Hysucat/small ferry.
    None of the old from Russia but currently being used monohull small/medium/large ferry in Asia have max speed over 33knots or 35knots, cruising speed max of around 27knots, a few have cruising speed of around 30knots. It is also a huge potential market for aluminium/fiberglass small/large river Hysucat ferry, large ocean Hysucat ferries (between 60’ – 200’ ferries).
    There is NO well known naval architect around Asia, Australia or New Zealand. There are 1 – 2 naval architect attempting, but their boat would have the max speed around 33 - 35knots, cruising speed max of around 27-30knots only.

    For the work from 3) – 4), I already spoke to water tank test people in Ha Noi, manufacturing facility at in Nha Trang.

    Do not worry that you would have to do a lot of work. You just design the slender hull, the hydrofoils design, simulate them by software. I will have people water tank test, report back to you, for modification & retest. I will have people 3D modelling & make it look colourful from your design rendering pictures, put the details, specifications, 3D modelling pictures on our multi language website.

    I will start with 1), 2) & 3) first while looking for more potential investors.

    a) The time difference of your time to the middle East countries & Asia countries are almost the opposite time zone.
    b) You will have difficulty, just to have telephone conversation. The shipping costs of your product from South Africa to USA, the middle East countries & Asia countries would be almost 1/4 the cost of your Hysucats,
    c) It would take about 21 – 30 days on container ship on the sea alone (port to port).
    d) You live far away, you would not know boating things here. You would not know the boat shows here, market price here, transports here, boat dealers here, potential investors here….etc.
    e) Even if you can sell, during the time of warranty 1 – 3 years (depends on manufacturer), you support your customer’s warranty as you would not know the local repairers here, engine & user problems, you can not stay up and talk to the repairer(s) and customer(s) in the middle of the night. If your do not support the customers well during the warranty, bad words spread out, difficult to sell into that local area in the feature.

    I know those issues well because I used to import boat from Brazil www.estaleirokrause.com.br
    into Australia.

    For the work in 1), all you need is to upload the details and pictures or email them to me. I uploaded, you lodge in the back office and correct the details if needed.

    For the work in 2), I will do them all, you assist if needed, and with your name as the designer on paper and website.

    For the work from 3) – 4), I already spoke to water tank test people in Ha Noi, manufacturing facility at in Nha Trang.

    Do not worry that you would have to do a lot of work. You just design the slender hull, the hydrofoils design, simulate them by software. I will have people water tank test, report back to you, for modification & retest. I will have people 3D modelling & make it look colourful from your design rendering pictures, put the details, specifications, 3D modelling pictures on our multi language website.

    I will start with 1), 2) & 3) first while looking for more potential investors/buyer for 4).

    B – About myself & misc
    My name is Mick Tran, born in VietNam, educated & grew up in Australia since I was 16 years old. I am 44 years old now. I have traveling to Asian countries, trying to business there since 1997. I know a lot about Asian countries, it is my second home.

    I have been working as a biomedical engineer for 18 years. I am not a naval architect. I used to import boat from Brazil www.estaleirokrause.com.br into Australia.

    I have researched and attempting to design hydrofoil, then I tumbled across you gentlemen’s Hysucat/ Hysucraft designed. I still attempted to design it for the last 3 years by myself as a hobby. The hydrofoil is too hard to design the hydrofoil & slender hull, to achieve top knots (50 – 60 knots) at 40% or more, possibly 55% - 60% fuel efficiency. I gave up now. I would like you to assist. Or you can teach me, I can fly to South Africa, learn the basic, more techniques, or you the things that I still do not know. I watched your dozens of video clip on www.youtube.com.

    I also have another 4 steps from 5) to 8), they a slightly different outer & inner hull, specialise design river & ocean Hysucat ferries (specialise the bow, transom, roof, every thing for ferry applications), trimaran with glass bottom & with hydrofoil support too. I already drafted the email & drafted in Maxsurf 13 for the last 3 years. Which I will send to you in the next email, when I have your email address.

    Please give me some rough estimated price/quotes for the design for 2), 3) & 4) only please? I can build the mould in VietNam. Please also give me your town/city name, country & telephone number so I will not ring and talk to you while you are sleeping.

    Thank you & looking forward for your assistance/cooperation.

    Mick Tran
    +61 421 897 172
    Email: mickt18@yahoo.com.au
    Sydney, Australia.
     
  9. MrHysucat
    Joined: Apr 2012
    Posts: 22
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Cape L' Agulhas/South Africa

    MrHysucat Hysucat Evangelist

    I will get him to contact you on info@blackeye-egypt.com ..... or alternatively forward your request to info@hysucat.co.za
     
  10. MrHysucat
    Joined: Apr 2012
    Posts: 22
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Cape L' Agulhas/South Africa

    MrHysucat Hysucat Evangelist

    We were impressed with your research, we will be in touch.:D
     
  11. Myrtonos
    Joined: Jul 2012
    Posts: 10
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Melbourne, Victoria, Australia

    Myrtonos Junior Member

    Here's a thought, if a hyrofoil has two hulls, how about an airchusion between them that genetrates lift whenever the foils don't.
     
  12. MrHysucat
    Joined: Apr 2012
    Posts: 22
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Cape L' Agulhas/South Africa

    MrHysucat Hysucat Evangelist

    The air cushion does play a part, but this only happens at speed and therefore works in conjunction with the hydrofoils. :idea:
     
  13. Ad Hoc
    Joined: Oct 2008
    Posts: 6,577
    Likes: 598, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    May be you're not aware of this guy who also uses foils:
    http://www.teknicraft.com/
     
  14. Myrtonos
    Joined: Jul 2012
    Posts: 10
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Melbourne, Victoria, Australia

    Myrtonos Junior Member

    Do you not know about rigid sidewall hovercraft, which do have an air cushion between the hulls, the draft is shallower on cushion that with the air cuishion off?
    Foils only generate lift while on the move relative to the water, and it is only effective about a certian water speed, and in the foil assisterd verison of the suface effect ship, the aircushion would merely compensate for insufficent lift at low speed, enabeling the craft to operate in shallower water and furthermore even enabling the craft to the parked instead of moored if the water is that shallow.
     

  15. sottorf
    Joined: Sep 2007
    Posts: 192
    Likes: 20, Points: 0, Legacy Rep: 202
    Location: South Africa

    sottorf member

    Once you have gone to the trouble of installing an air cushion system there is no need for a hydrofoil system anymore as air cushion craft are known to be more efficient than HYSUCATs albeit at considerable extra complexity, build cost and maintenance cost.

    What is needed to develop HYSUCATs further is a method to reduce the hull resistance. Typically the hulls carry 40-50% of the displacement but are responsibile for 60-70+% of the total resistance. Right now I am working on a vairety of nano-modified low friction coatings together with AMC (www.amcoat.no) in Norway to achieve this.
     
Loading...
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.