New oleopneumatic invention traction roller Dyneema

  • There is still no announcement from the company, but assuming the gun works OK and the only thing that you have to pay attention to is the continued even wrapping of the outer cables on the winding drums, how many people would be interested in buying one? The interior of the gun is sealed so that water never gets inside it except for whatever moisture in the atmosphere is pushed into the gun when you pump it up. The power of the "Dreamair" can be altered between dives by adjusting the air pressure inside it by bleeding air out or adding air with the hand pump. The main consequence of using compressed air as a frictionless and low loss spring is that the gun body has a certain girth along its length which means it cannot have a long tapered muzzle section as some band guns do. Although it is not a rollergun the wide head with the beehive shape winding drums makes the "Dreamair" more like a rollergun in terms of the outer envelope and the continued push on the spear for the full length of the gun

    The post was edited 3 times, last by popgun pete ().

  • Outer profile is less of an issue than the concern of whether it's reliable and doesn't require special handling I think. As things stand now I can only see someone who's got money to throw away and is into novelty items buying, as opposed to someone who's really looking for a performance advantage.

  • I already told Andreas this rifle does not work for the normal fish trap

    It serves to make target shooting, it does not have a useful, manageable, practical and simple form.

    The cost of the pieces is much higher, having many pieces that make up the rifle.

    Well who wants to invest already knows what is in the market.

  • Outer profile is less of an issue than the concern of whether it's reliable and doesn't require special handling I think. As things stand now I can only see someone who's got money to throw away and is into novelty items buying, as opposed to someone who's really looking for a performance advantage.

    Andreas told me that thousands of shots have been put through the "Dreamiar" guns with no problems and the outer cables were lasting longer than had been expected, even though the spiral track edges push the cables laterally with each shot as that is what makes them wrap properly on the winding drums. That sideways pushing of the cables is what will wear them out and originally it was anticipated that they were good for around 200 shots. Apparently the winding drum groove depth alters slightly across the drum faces to assist in this correct laying of the cables in the spiral tracks, but I don't know the details of where these depth variations are located. If there are problems then they are most likely to be the inner piston sticking after a long period of storage, this happens with most pneumatic guns if you don't let most of the air out, and some foreign objects getting caught up in the groove tracks or inflicting damage on the outer winding drums. That and the inner cable having some durability problems, although it is thicker than the outer cables everything depends on it transmitting the power to the revolving axle and unlike the outer cables you cannot see it, but then it is protected inside a completely sealed environment. How the dyneema of the inner cable responds to being soaked in oil I do not know, however guns tested to date will have experienced this situation and there has been no comment on it being a problem. The only other unknown is the hydraulic shock absorber installed in the rear section of the gun barrel/tank, how often does its oil supply need to be checked as to get at it you will need to open the gun up.


    The reason that the "Dreamair" works at all is that it uses more elaborate bearings and seals than would normally be used in a speargun and more finely machined components (the inner and outer winding drums), however whether the increase in utility (you can adjust its power by simply changing the internal air pressure) justifies the cost depends on how much extra it will cost over something comparable in performance. As for the barrel/tank profile, if the gun is a bit of a paddle then it will lose out to slimmer and more tapered band guns for manoeuvrability. I would not pass judgement until I can lay my hands on a gun, however despite my attempts to provide some motivation to get the guns to be released earlier in their alloy barrel form, which would be fine for my requirements, the timetable, if there is a timetable, does not look like being rushed.

  • I already told Andreas this rifle does not work for the normal fish trap

    It serves to make target shooting, it does not have a useful, manageable, practical and simple form.

    The cost of the pieces is much higher, having many pieces that make up the rifle.

    Well who wants to invest already knows what is in the market.

    Well that is the big question and the answer will largely determine the "Dreamair" gun's fate as if it costs too much then bar "early adopter" sales where people will buy it for whatever it costs the majority of potential buyers will weigh up their alternatives. One big problem is if people think it will be a short term wonder with no long term prospects then a fear of being stuck with a gun with no ongoing supply of spare parts will kill its sales. That has happened before as the Demka BR series band gun from Greece, which looked just like a pneumatic speargun, had no spare parts support in overseas markets and buyers consequently stayed away from it.

    The post was edited 1 time, last by popgun pete ().

  • Th

    That's the question, to have spare parts you have to have a large established market

    I do not see, nor saw an exit to that rifle from the first day.

    The submarine fishing rifles have to be simple, effective, manageable, robust, efficient, manageable, hydrodynamic.

    And without complications neither long, nor short term.

    Popgun Pete if you have faith in this rifle and continue with future hopes

    the only thing you can not do is simplify the model.

    I do not want to take away your Faith, in a purpose that was born dead

    I hope I'm wrong.


    In Italy there is an aerospace engineer who made carbon rifles and was worth 3ooo to 4ooo Euros, he closed the Bazar L 'Antico Guerriero, I made him see that copying me according to what ideas was not good.

  • It is unusual to start such a project in the modern era without market research and an analysis of the costs and likely return on investment, however many of the pioneers who created the well-known "brand name" spearguns in the fifties and sixties did not bother with that process either and just followed their passion and trusted their instincts. However the difference now is a market almost overflowing with speargun choices and it will be much more difficult to break into it with something that seems so different to anything that has gone before. For my part I have tried an education process to demystify the "Dreamair" design and show that it is a cable speargun and could equally have had plain drums to wind the cables on, but then the CVT gearing would be absent and the wrapping of the cables may not have proceeded in an orderly fashion which would be disastrous with uneven side to side pull.

    The post was edited 1 time, last by popgun pete ().

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