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  1. StreamDancer

    Centrifugal pump for boat propulsion

    Success! . . . well moderate success. Using a trolling motor (on each hull) turned vertically with 5" dia impeller (8 blades, each 1.5" wide), I was able to get the boat to move forward and reverse. Performance speed was only about half of what regular trolling motor props would do. The good...
  2. StreamDancer

    Centrifugal pump for boat propulsion

    Mike, The Tesla disc pump may be the answer. I emailed them for help this morning. I'm not sure what you mean by a stripper blade and wonder about the fender. If this disc churns up the water and/or splashes alot, the fish will swim for their life and the purpose will be defeated. I am hoping...
  3. StreamDancer

    Centrifugal pump for boat propulsion

    I tried the tunnel approach. Formed a tri-hull with kayak-like hull down the center, tunnels on each side, and sponsons just outside the tunnels. Utilized trolling motors with 10" props in raised tunnels at mid-point in craft. The props cavitated profusely, so I lowered the tunnels. Stil...
  4. StreamDancer

    Centrifugal pump for boat propulsion

    StreamDancer This project was commended in the 2005 Intl Concept Boat Competition for its introduction of foot control to a personal fishing craft. Each foot has control for forward/reverse and speeds for each trolling motor . . . creating differential steering. Adding the mechanical reverse...
  5. StreamDancer

    Centrifugal pump for boat propulsion

    In lieu of trolling motors, I looked at bilge pumps. Since reverse is not possible and speed control is non-existant, I would have to use 12 pumps - one of each of 3 speeds in forward and reverse on both sides. the expense at $40 each along with the mounting nightmares and additional weight...
  6. StreamDancer

    Centrifugal pump for boat propulsion

    Mike and anyone interested, I'm not smart enough to argue any points, but I've seen something similar at www.vortapowersystems.com and believe that the theory, though not as efficient as propellers, should work for this craft. I just need some help with the volute design and some estimate of...
  7. StreamDancer

    Centrifugal pump for boat propulsion

    Designing an electric powered personal fishing catamaran. We started with two trolling motors for propulsion and differential thrust steering but the trolling motors must draft at least 15". The craft drafts only 5" and we would prefer to have propulsion wherever the boat will go. We have...
  8. StreamDancer

    Centrifugal pump for boat propulsion

    Designing an electric powered personal fishing catamaran. We started with two trolling motors for propulsion and differential thrust steering but the trolling motors must draft at least 15". The craft drafts only 5" and we would prefer to have propulsion wherever the boat will go. We have...

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