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MaxAir Swim Fins - Stay Down Longer with Less Effort

Discussion in 'Classifieds: Other Gear & Multiple Items' started by TECreation, Nov 21, 2015.

  1. TECreation

    TECreation ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Orlando FL
    96
    24
    FIN61 Poster 800x450.jpg Let's make longer dives normal by making these MaxAir Swim fins the new standard. Years of research and development have gone into these which are proven to use less energy (breathing air) than today's standards. We need to get them manufactured for everyone to discover the benefits. To do this we will be running a crowdfunding campaign which could be quite profitable for the early backers. Go to www.MaxAirFin.com for more information to learn how they work and get in on the ground floor.
     
    Last edited: Nov 21, 2015
  2. Michael Guerrero

    Michael Guerrero Solo Diver

    1,339
    400
    I don't get it. If the channels open during the major thrust part of the kick how are you supposed to have any thrust? It seems like these might be "easy" but that you won't go anywhere with your kicks because the channels let all the water pass through the fins instead of resisting the water and propelling you forward.
     
  3. TECreation

    TECreation ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Orlando FL
    96
    24
    MaxAir fins work like airplanes

    That is a great question. Most fins work on the principle you describe. I call it the barn door effect. The bigger the door the more push required to move it against the wind. While that works it is not very efficient. Have you seen any airplanes which use barn doors as wings? These fins work on the same principles as airplanes. The vanes (wings) rotate to align to the correct angle of attack so there is laminar flow across the vanes with a 5 degree angle of attack. This produces lift on the side of the vane which is facing forward at the time and propels you forward. Here is an illustration of the lift vectors as calculated by a fluid dynamics program for the vane used on this fin.
    FIN 0009 Lift Diagram M01D09A0044D00Re10KF.gif

    As for the "open channels," they are not lost push. They are lost drag. That is one reason there is so much less effort required to kick. I am spoiled now. Whenever I trade fins with someone so they can try the MaxAir I feel like I have just put boat anchors on my feet. It feels like I am being pulled backwards, especially when coasting. Here is an illustration showing how the vanes work together to provide lift.
    FIN Lift.gif In this illustration the swimmer is moving to the right.

    I hope this answers your question. Please ask more and ask your friends to ask.
     
    Last edited: Nov 22, 2015
  4. knotical

    knotical perpetual student

    # of Dives: 1,000 - 2,499
    Location: Ka'u
    5,748
    826
    Any plans for independent testing of your fins alongside others?
     
    northernone likes this.
  5. hroark2112

    hroark2112 Tech Instructor

    # of Dives: 0 - 24
    Location: Raleigh, NC
    1,453
    1,490
    I'd be happy to act as an impartial tester. Send me a set and I'll put them through their paces.
     
    Shotmaster likes this.
  6. TECreation

    TECreation ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Orlando FL
    96
    24
    MaxAir Fin Testing Process

    Of course we would like to do independent testing but that will likely have to wait until after the crowdfunding effort. That will enable us to manufacture "real" fins which could be tested without supervision.

    We have done extensive in-house testing using probably the only truly objective process in existence at this point. The major barrier to independent testing at this point is the lack of sufficient fins to put them out in the wild. Each of the 80 prototypes produced to date has been custom built using polyurethane plastic rather than the planned polypropylene, which is way more durable.

    Here is a plot of the performance curve for one of those tests.
    FIN Air Use Chart.jpg

    While it is affordable (about $500 a pair) to make prototypes with polyurethane there are two major drawbacks. Polyurethane is relatively brittle and prone to warpage when heated or left in a stressed condition. These two properties make it virtually impossible to let the fins out of company control for testing since most people do not understand these limitations. Manufacturing out of polypropylene requires about $150,000 in molds making it impossible to do that for prototypes.

    Go to www.tecreationdev.com/maxair-testing.php to see videos of the actual testing.

    We will have more testing before we launch the crowdfunding but the real fun it unboxing your own fins so sign up for our pre-crowdfunding list to make this happen sooner not later.
     
    Last edited: Nov 22, 2015
  7. TECreation

    TECreation ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Orlando FL
    96
    24
    Please look at the previous post to understand why it is difficult to just send fins out for testing. Once we have manufactured the "real" version we will be able to send fins out for evaluation. That will be after we raise the capital to make the molds through crowdfunding. Help us get to that stage by showing your interest on our pre-crowdfunding list.

    We are looking for some qualified testers in the Orlando FL area to help with the in-house testing.
     
  8. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
    11,370
    9,270
    Loan a pair to Scuba Diving magazine to try out. I think they are near Orlando.
     
  9. TECreation

    TECreation ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Orlando FL
    96
    24
    Yes, ScubaLab is in Winter Park FL. I have been one of their testers this year and I did take the MaxAir to the fin test. It was not on their official roster but when the testing was finished some of the testers tried them without putting them through all the paces. (At the end of an all day testing session we are all pretty tired.) In general the comments were that they are at least as good as the other fins tested. The thing to realize is the Scubalab testing of fins this year was strictly subjective. There were no tests performed which could have objective results. We will certainly submit fins to ScubaLab after the production version has been made.

    Meanwhile, help us get to the production version by showing your interest in the MaxAir by signing up for our no obligation pre-crowdfunding list.
     
  10. acteg

    acteg Contributor

    # of Dives: 100 - 199
    Location: Central FL
    403
    134
    I'm in the Orlando area and would love to help. Currently using force fins. I'm curious has there been any testing against a current?

    Sent from my D6708 using Tapatalk
     

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