Recent Content by Dennis A

  1. Dennis A
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    Air bubble lubrication successful trials

    Hi Jake Listed below is the design and performance data of my boat Turtle which you witnessed at the last CCC, The air injection system worked...
    Post by: Dennis A, Jan 7, 2022 in forum: Boat Design
  2. Dennis A
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    Efficient electric boat

    Prop for longtail Hi Boucaneer Sounds interesting, I assume that you are looking for lowish speeds. I would start with a 12" x 12" prop to...
    Post by: Dennis A, May 3, 2015 in forum: Boat Design
  3. Dennis A
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    Pedal Powered Boats

    That prop looks great and will shed the weed very easily. What is the design revs, pitch and blade width. Dennis
    Post by: Dennis A, Jul 1, 2014 in forum: Boat Design
  4. Dennis A
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    Pedal Powered Boats

    Nautibike I was searching the web and can across the Nautibike which is a typical small pedaled cat. of about 3 m lg. This is quite well...
    Post by: Dennis A, Sep 9, 2013 in forum: Boat Design
  5. Dennis A
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    Pedal Powered Boats

    Pedal Powered Hydrofoil Hi Tom Your foil project some good but do you really need an adjustable front foil or is this something that has just...
    Post by: Dennis A, Dec 4, 2012 in forum: Boat Design
  6. Dennis A
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    Pedal Powered Boats

    Prop Design Scheny Due to the weed shedding function, your latest prop is starting to look like a Torqeedo Ultralight. Jeremy In the first...
    Post by: Dennis A, Oct 1, 2012 in forum: Boat Design
  7. Dennis A
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    Pedal Powered Boats

    Wider Props Scheny When I beat Jeremy in the Cordless CC I had increased the width of the Prop by 45% to virtually eliminate slippage which...
    Post by: Dennis A, Oct 1, 2012 in forum: Boat Design
  8. Dennis A
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    Pedal Powered Boats

    Z-drive I have found with my twisted chain drive systems that the weed catches on the drive housings& not the propeller. On the Z-drive will the...
    Post by: Dennis A, Sep 22, 2012 in forum: Boat Design
  9. Dennis A
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    cordless airboat propeller question

    Cordless Air Boat Alan As I have said before, a increase of 1.5 X the prop speed will make a improvement in your boat speed but could damage the...
    Post by: Dennis A, Sep 22, 2012 in forum: Boat Design
  10. Dennis A
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    Pedal Powered Boats

    Steerable Z-Drive One of the biggest advantages of the flexible shaft drive is that the boat can be beached and launched with the shaft lifted up...
    Post by: Dennis A, Sep 21, 2012 in forum: Boat Design
  11. Dennis A
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    Pedal Powered Boats

    Waveless Concept I am always searching for the perfect pedal boat which should be fairly fast,manuverable, light and easy to transport. I have...
    Post by: Dennis A, Jul 16, 2012 in forum: Boat Design
  12. Dennis A
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    Pedal Powered Boats

    Angle drive unit Thanks for your practical advice , I will just forget that fragile unit. I have in the past noticed that Rick W seams to break...
    Post by: Dennis A, Feb 17, 2012 in forum: Boat Design
  13. Dennis A
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    Pedal Powered Boats

    Simple right angle drive unit I was browsing at the local Axminster tool centre and spotted a angle drive unit that could be used for a bent...
    Post by: Dennis A, Feb 15, 2012 in forum: Boat Design
  14. Dennis A
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    Pedal Powered Boats

    Swivelling Prop. Hi Ian Here is a simple sketch of the swiveling prop design. The only one I know of was 2 bladed with prop from bronze and...
    Post by: Dennis A, Mar 7, 2011 in forum: Boat Design
  15. Dennis A
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    Pedal Powered Boats

    Hi Ian I had a similar problem of over revving due to prop slip of up to 30%. To cure the problem I doubled the cord width but then struggled to...
    Post by: Dennis A, Mar 5, 2011 in forum: Boat Design