Royal Crown Yachts 100' surface-effect ferry

Discussion in 'Powerboats' started by Jeff, Jan 24, 2002.

  1. Jeff
    Joined: Jun 2001
    Posts: 1,368
    Likes: 71, Points: 58, Legacy Rep: 923
    Location: Great Lakes

    Jeff Moderator

    In the current issue of Professional Boatbuilder, Issue Number 75, there is a nice article on a 100' surface-effect ferry being built by Royal Crown Yachts, Tampa FL for Fast Cats Ferry Service. The ship uses a fan drive ductwork system to force air under each hull. "Each fan will put out 85,000 cu ft of air per minute at about 17" of water pressure. Air exits the fans into the cavities under each hull at an estimated speed of 100 mph." The initial R&D was done in the 90's by Don Burg of Air Ride Craft in Miami, and a 35' scale prototype was manufactured by Howard Harley at the Harley Boat Corporation. Partially finished hulls were then transferred to Royal Crown Yachts in Tampa. The article details the re-evaluation and finishing of the ship for the purpose at hand. I found it quite interesting. I wish I could find more info on the web.

    LOA: 100' / 90,000 lbs.
    4 x 1,100 hp Caterpillars, ZF SDS5 surface drives
    2 x 300 hp Cat fan-drive engines
    1,900 gal fuel
    60 knots, 220 gallons per hour with all engines, fans, and generators running.
  2. Scott
    Joined: Jun 2001
    Posts: 41
    Likes: 0, Points: 0, Legacy Rep: 10

    Scott Junior Member


    modeled in Rhino:

    Attached Files:

  3. Scott
    Joined: Jun 2001
    Posts: 41
    Likes: 0, Points: 0, Legacy Rep: 10

    Scott Junior Member

    And a second image from the top looking down at the duct system. These are on page 86 of Professional Boatbuilder.

    Attached Files:

    Joined: Jan 2002
    Posts: 21
    Likes: 1, Points: 0, Legacy Rep: 60

    JORGE LANG Junior Member

    We designed and fabricated the exhaust system for this boat. It was a challenge considering there were 8 exhaust systems in one boat. Let me know if you would like any more information.
  5. Stephen Ditmore
    Joined: Jun 2001
    Posts: 1,389
    Likes: 44, Points: 58, Legacy Rep: 699
    Location: Smithtown, New York, USA

    Stephen Ditmore Senior Member

    I'm happy to see a U.S. designed fast ferry built, esp. one that pushes the envelope a little. There has been some fast ferry construction in the U.S., but a high proportion have been designed in England or Australia. We have the talent right here!
  6. gilesclark
    Joined: Feb 2002
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: United Kingdom

    gilesclark New Member

    Surface effect ships

    While it is good to see continuing work on the SES hull form unfortunately to-date it has proved to be a non starter commercially.

    The most successful of this type of design has to be the Hovermarine 218s which is more akin to a hovercraft in that it has skirts forrad and aft to retain the air pressure under the hull. They have also been described, for obvious reasons, as side walled hovercraft. The Hovermarine 218s have had a glorious career in Hong Kong, running across the harbour.

    Equally the Norwegian versions of an SES have predominantly been sidewall hovercraft.

    The principal builders of SES vessesl to date have been Norwegian and British. Avondale did build an Air Ride 109 in the early 90s. In all about 100 SES have been built todate, over half of which are from Hovermarine.


  7. AmnonMikeCohen
    Joined: Feb 2008
    Posts: 104
    Likes: 2, Points: 18, Legacy Rep: -26
    Location: Crofton BC Canada & Hertzeliyah Israel

    AmnonMikeCohen Inventor

    I am interested in what you have done with the exhaust system for this designed vessels, and if is is beneficial.
    Joined: Jan 2002
    Posts: 21
    Likes: 1, Points: 0, Legacy Rep: 60

    JORGE LANG Junior Member

    As I mentioned, this was a nice project considering the amount of systems in one vessel. The design was such that we needed to meet backpressure requirements of CAT while at the same time, keeping the size of the system compact. Please feel free to contact me if you have something coming up which you would like me to look at.

    1 person likes this.
  9. Myrtonos
    Joined: Jul 2012
    Posts: 10
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Melbourne, Victoria, Australia

    Myrtonos Junior Member

    Here's a thought, how about making the platoons retractable? Generally the platoons would be retracted off-cushion and always extended when on cushion.
  10. mydauphin
    Joined: Apr 2007
    Posts: 2,164
    Likes: 53, Points: 48, Legacy Rep: 575
    Location: Florida

    mydauphin Senior Member

    The amount of HP on this vessel hardly makes it efficient, 100 feet, 60 MPH, 5000 HP. What happens when it hits rougher waters and all the air leaks out. It will be interesting to follow.
  11. micspoko
    Joined: Jul 2010
    Posts: 238
    Likes: 6, Points: 28, Legacy Rep: 96
    Location: Poland

    micspoko Senior Member

  12. philSweet
    Joined: May 2008
    Posts: 2,434
    Likes: 252, Points: 83, Legacy Rep: 1082
    Location: Beaufort, SC and H'ville, NC

    philSweet Senior Member

    Since it's a ten year old thread, that shouldn't be too hard.:p
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.