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"Dreamair" Pneumatic powered cable drive CVT Speargun

Discussion in 'Underwater Hunting' started by Popgun Pete, Sep 12, 2019.

  1. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
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    It has been many years in development, but finally this very different type of speargun has emerged as a carbon fiber speargun that looks and operates much like a band gun, but has no rubber power bands, only thin woven cord cables. Essentially it is a pneumatic energy accumulator that you use muscle power to charge up and is a high speed winch that launches the usual projectiles towards fish with power and precision. A pneumatic storage system is much more energy efficient than rubber bands and the CVT aspects allow the user to draw back the wishbone against force levels that would not otherwise be possible. Acting as a torque manipulator an axle mounting an inner and outer set of winding drums adjusts the force profile as the gun is cocked so that it is reversed in that dropping the wishbone in on the shaft tab is done at a lower force level than what will be produced as the wishbone drives forwards once the trigger is pulled.

    Nothing like it has ever appeared before and the operating principle is covered by International Patents.
    Dreamair operating cycle R.jpg


    air powered cable gun CVT system.jpg
    four views schematic R.jpg
    Axle & Winding Drums with seals and bearings R.jpg
    Dreamair alloy and carbon guns.jpg
     
  2. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
    219
    185
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    Infinitengines


    This video shows the carbon fiber "Dreamair" speargun being put through its paces.

    Earlier there were prototype alloy bodied guns using the same operating principle and eventually "Dreamair" guns will be produced in both constructions.
    13532986_1764139063832351_1841755129840178920_n.jpg
    Dreamair wishbone track template BR.jpg
     
    IncreaseMyT likes this.
  3. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
    219
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    These loading gadgets help with pulling the wishbone back if the "Dreamair" gun is being used at higher pressures.
    loading device cable only version R.jpg
    Dreamloader with pulley.jpg
    Dreamloader schematic.jpg
     
  4. michael-fisch

    michael-fisch Manta Ray

    # of Dives: 2,500 - 4,999
    Location: Germany
    718
    441
    63
    Nice!:76feet:
    How expensive and when available?
    Shipping?

    Michael
     
  5. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
    219
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    Unknown, the recent video was only put out a few days ago as it took much longer than expected to create a carbon fiber gun as a number of new technical issues had to be solved that were unique to this type of construction. The aluminium version was somewhat easier as pneumatic guns have always been made from that material and alloy tubing provides a pressure tight and smooth surface for a sliding piston which is propelled by expanding compressed air.

    The website www.infinitengines.com was intended as the place where the guns would be marketed from initially, but until that site resumes operation we all have to await further developments in terms of production guns becoming available.

    The aluminium gun was first seen in action here:-
     
  6. Vicko

    Vicko Barracuda

    # of Dives: 50 - 99
    Location: Komizža, Croatia
    322
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    Intresting concept but the shaft seems slow judging by the line unwinding.
     
  7. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
    219
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    Others have made that same comment, the shooting line does not just rip straight off the gun as I thought it might, you see a midway line loop pull out on the sandy bottom as the water is shallow. A little over 6 meters of line on the gun it seems. The gun has plenty of power stored in it, but how much of that power comes out? However the 6 meter shots seem pretty flat, they don't look lobbed, so the shaft must be flying reasonably quickly to not have any appreciable drop and the repeatability looks good with clusters in the top left corner of the target. I have a hydropneumatic gun that shoots 6 meters in a dead straight line, but the "Dreamair" on paper has more power than it does (!), so even allowing for some inefficiency it has enough power to throw some away. We don’t know the video recording speed either, the vision could be slowed down to see the shots better. No velocity info or penetration tests yet. The attraction I see is no bands to replace, the pneumatic system is totally isolated and the only thing passing through a pressure boundary is the axle that mounts the outer drums. Nothing to wear out but the outer cables which are easily replaceable.
    cable connection detail.jpg
    14924078_1826073457638911_345759783_o.jpg
    Dreamair servicing R.jpg
     
    Vicko likes this.
  8. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
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    A new photo of the "Dreamair Unreal" has just been added to the site. It appears to not have the outer drums fitted as you can see the ends of the axle.
    81758524_2543394962573420_2197725917730570240_o.jpg
     
  9. BoundForElsewhere

    BoundForElsewhere ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: New York, New York
    540
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    I can't tell. Did you hit the target?
     
  10. Popgun Pete

    Popgun Pete Barracuda

    # of Dives: 500 - 999
    Location: Melbourne, Victoria, AUSTRALIA
    219
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    The videos show the target being threaded by the shooting line, but all the shots are by those directly involved with the project as guns are yet to be sold to the spearfishing community, although plenty are waiting.
     

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