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<blockquote data-quote="Two Tone" data-source="post: 3509756" data-attributes="member: 44728"><p>Must admit that I see you point and sympathise with it. There is quite a lot to it and you would only appreciate how much when you actually get to see one. Incredibly cleverly designed with the lower knife spacing wider than the top to reduce vibration. Far less so than a conventional knife and finger system, only needing 4 HP over 30 ft to drive it.</p><p></p><p>The knife itself has been around for a long time. Commonly uses on dredging buckets to remove reeds from rivers and canals. So it is very robust and will deal with dirt and stones easily.</p><p></p><p>Then there is the drive system and the lifting system too. The Rollers are vital either side of the wheels and/or tracks, to push the Dual Straw to the ground and make it rot. Without these the straw would sit on top of the stubble and create a nightmare for subsequent cultivations. The wheels/tracks do the same job. Between the wheels, the swathed straw landing on the stubble or the momentum immediately behind the chopper, push the Dual Straw to the ground.</p><p></p><p>It is all mechanical. The only electrics involved are a solenoid operated hydraulic diverter valve to take oil from the Vari-feed circuit to the DS lifting assembly circuit and a switch in the cab. Vari-feed is still useful but distances are roughly halved</p><p></p><p>It did take considerable thinking about and design changes to perfect the system.</p><p></p><p>What we were expecting was about a 25% increase in capacity. So we use a 25 ft version to replace our 20 ft normal header.</p><p></p><p>What we found was that we were travelling 20% faster, despite the fact that the header is 25% wider! So in effect the cost is worsened by the fact that you need a header that costs up up to 25% more PLUS £1k/foot additional for the DS.</p><p>Or you will need very flat fields with no tram-line ruts and be prepared to be travelling at a very high forward speed.</p><p></p><p>These costs are still well below what the cost of an equivalent non DS Combine will be, that achieves the same capacity.</p><p></p><p>Not only do you get the same capacity for less purchase cost. You also get less wear on the header and the internal parts of rest of the Combine. There is far less chance of any foreign objects entering the combine, The crop is drier, requiring less drying,</p><p>Fuel used is 33% less and harvesting time is 33% quicker (than the same size combine without a DS fitted).</p><p></p><p>New Holland won't quote figures as high as these. But I am the guy who had used a DS more than anybody else in the world and these are my experiences. But even their figures still make sense.</p><p></p><p>So all in all [USER=43882]@dannewhouse[/USER] , I would agree that it does at first appear expensive for what it is, until you work it out, try it and see all the benefits.</p><p></p><p>I don't work for NH and don't get paid for any of this.</p><p>I am incredibly lucky to have been involved with the whole project and now I have my own, which I think I have earned.</p><p>I couldn't bare the thought of not having it!</p><p>I'm just telling you my experiences and what I see of it.</p><p></p><p>To me, It's a no-brainer!</p><p>In the last 60 years of Combine design and development, nothing else has ever created anything like as much as much of an improvement in capacity as the DS system!</p><p></p><p></p><p>PS</p><p>I have thoroughly enjoyed every bit of being part of the DS development. But I have had even more pleasure in making the prototype I ended up with work properly, designing and building its unique lifting assembly and building the Header trailer to fit it on.</p><p></p><p>IMO there is no greater pleasure than seeing something you know that you can improve on, then building it and making it work. Even more so than actually using it!</p></blockquote><p></p>
[QUOTE="Two Tone, post: 3509756, member: 44728"] Must admit that I see you point and sympathise with it. There is quite a lot to it and you would only appreciate how much when you actually get to see one. Incredibly cleverly designed with the lower knife spacing wider than the top to reduce vibration. Far less so than a conventional knife and finger system, only needing 4 HP over 30 ft to drive it. The knife itself has been around for a long time. Commonly uses on dredging buckets to remove reeds from rivers and canals. So it is very robust and will deal with dirt and stones easily. Then there is the drive system and the lifting system too. The Rollers are vital either side of the wheels and/or tracks, to push the Dual Straw to the ground and make it rot. Without these the straw would sit on top of the stubble and create a nightmare for subsequent cultivations. The wheels/tracks do the same job. Between the wheels, the swathed straw landing on the stubble or the momentum immediately behind the chopper, push the Dual Straw to the ground. It is all mechanical. The only electrics involved are a solenoid operated hydraulic diverter valve to take oil from the Vari-feed circuit to the DS lifting assembly circuit and a switch in the cab. Vari-feed is still useful but distances are roughly halved It did take considerable thinking about and design changes to perfect the system. What we were expecting was about a 25% increase in capacity. So we use a 25 ft version to replace our 20 ft normal header. What we found was that we were travelling 20% faster, despite the fact that the header is 25% wider! So in effect the cost is worsened by the fact that you need a header that costs up up to 25% more PLUS £1k/foot additional for the DS. Or you will need very flat fields with no tram-line ruts and be prepared to be travelling at a very high forward speed. These costs are still well below what the cost of an equivalent non DS Combine will be, that achieves the same capacity. Not only do you get the same capacity for less purchase cost. You also get less wear on the header and the internal parts of rest of the Combine. There is far less chance of any foreign objects entering the combine, The crop is drier, requiring less drying, Fuel used is 33% less and harvesting time is 33% quicker (than the same size combine without a DS fitted). New Holland won't quote figures as high as these. But I am the guy who had used a DS more than anybody else in the world and these are my experiences. But even their figures still make sense. So all in all [USER=43882]@dannewhouse[/USER] , I would agree that it does at first appear expensive for what it is, until you work it out, try it and see all the benefits. I don't work for NH and don't get paid for any of this. I am incredibly lucky to have been involved with the whole project and now I have my own, which I think I have earned. I couldn't bare the thought of not having it! I'm just telling you my experiences and what I see of it. To me, It's a no-brainer! In the last 60 years of Combine design and development, nothing else has ever created anything like as much as much of an improvement in capacity as the DS system! PS I have thoroughly enjoyed every bit of being part of the DS development. But I have had even more pleasure in making the prototype I ended up with work properly, designing and building its unique lifting assembly and building the Header trailer to fit it on. IMO there is no greater pleasure than seeing something you know that you can improve on, then building it and making it work. Even more so than actually using it! [/QUOTE]
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