MPX-11 Very Small High Power Trimaran

Discussion in 'Multihulls' started by Doug Lord, Jul 13, 2010.

  1. Doug Lord
    Joined: May 2009
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    UPDATE:

    Having just reread this thread it seems like an update is in order. The Fire Arrow Test Model was built and successfully tested in July 2014.
    The basic system described in this thread was used with these changes:
    1-the unloading of the main foil occurs much faster than was originally thought. Therefore, lift to leeward by the main foil caused by the design sailing angle of the boat
    occurs for a very short time as the boat becomes foil-borne. To compensate for that the vertical portion of the ama foil is twisted to a positive angle of incidence which also unloads daggerboard as speed builds. What was a perplexing problem is now 100% solved.
    2- While no foils ,T-foils w/o wands and curved foils on the ama were considered in this thread the development by TNZ of the UptiP ama foil seems like it was made for this concept and for all foiling tris. The Fire Arrow Test Model(which grew out of this thread) was the first trimaran ever to use the combination of lifting mainfoil, rudder T-foil and ama UptiP foils on a 100% full flying trimaran. The system allows the use of of an oversquare beam coupled with light air takeoff ....and more.
    3- Since the successful testing of the Fire Arrow Test Model using basic concepts first postulated in this thread, several large trimarans have adopted their own versions of the Fire Arrow Foil System including the capability to use the daggerboard lifting foil to develop downforce and further proven the basic Foil System in thousands of ocean miles starting with Maserati followed by Gitana 17, Banque Populaire, and Macif!!
    4-The Two Stage Ama* system first shown in this thread was used very successfully on the Fire Arrow Test Model and will be used on the fullsize WOLF.
    *Devils Tail ama
    5- Further development of the concepts first mentioned here is covered in the Fire Arrow thread along with the design and development of the fullsize WOLF and also some interesting technical details of some of the full size tri's using foil systems remarkably similar to the Fire Arrow Foil System:
    High Performance MPX Foil/Self-righting Trimaran-The Test Model https://www.boatdesign.net/threads/high-performance-mpx-foil-self-righting-trimaran-the-test-model.36058/page-186
    ==========================

    Fire Arrow using some of the concepts first mentioned in this thread:
    MPX_Fire Arrow-3D SAILING-7-24-14 009 (2).JPG
     
    Last edited: Sep 15, 2018 at 10:40 PM
  2. OzFred
    Joined: Nov 2015
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    Location: Earth

    OzFred Senior Member

    No it isn't. This thread was dead for 7 years. You have filled the "Fire Arrow" thread with interminable reposting of the same information for nearly a decade, there is absolutely no need for more of the same reposted in another thread.
     
    redreuben and David Cooper like this.

  3. Doug Lord
    Joined: May 2009
    Posts: 15,265
    Likes: 195, Points: 73, Legacy Rep: 1362
    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

    ===========================
    I emphatically disagree. I have no intention of carrying on the Fire Arrow discussion here. I wanted to point out the fact that the basic system* conceived of in this long thread finally worked and is now proven and used by several fullsize trimarans. It's the least I could do for the people who have invested the time to wade thru this thread.
    *including using the daggerboard lifting foil to develop downforce
     
    Last edited: Sep 15, 2018 at 10:43 PM
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