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<blockquote data-quote="Michael S" data-source="post: 8022747" data-attributes="member: 419"><p>Joskin rule of thumb for flat land is 10hp per 1000l plus 10hp for luck. At 23,000l you might need a little bit more luck although I would say their guide is not far out. I used to pull a 16,000l with a Fendt 939 because it is what I had for other jobs. When I no longer required the 939 I sold it and bought a Valtra T174 (190hp in transport) and noticed no change in output because the Valtra can pull the same tanker as fast as you would want to go safely on the road.</p><p></p><p>To all the naysayers worrying about having a tractor that can stop the tanker I say any trailer, whatever size it is, should have more than enough brakes to stop itself so the tractor brakes only have to stop the tractor. Also remember that braking force required increases in proportion to weight; speed however is the killer - braking force required to stop in the same distance increases by the square of speed. So to stop the same weight from 60km/hr in the same distance as from 30km/hr requires four times the braking the force. As ever driver attitude and skill will have more to with safe operation than anything else provided the tanker has brakes correctly specified for its weight.</p></blockquote><p></p>
[QUOTE="Michael S, post: 8022747, member: 419"] Joskin rule of thumb for flat land is 10hp per 1000l plus 10hp for luck. At 23,000l you might need a little bit more luck although I would say their guide is not far out. I used to pull a 16,000l with a Fendt 939 because it is what I had for other jobs. When I no longer required the 939 I sold it and bought a Valtra T174 (190hp in transport) and noticed no change in output because the Valtra can pull the same tanker as fast as you would want to go safely on the road. To all the naysayers worrying about having a tractor that can stop the tanker I say any trailer, whatever size it is, should have more than enough brakes to stop itself so the tractor brakes only have to stop the tractor. Also remember that braking force required increases in proportion to weight; speed however is the killer - braking force required to stop in the same distance increases by the square of speed. So to stop the same weight from 60km/hr in the same distance as from 30km/hr requires four times the braking the force. As ever driver attitude and skill will have more to with safe operation than anything else provided the tanker has brakes correctly specified for its weight. [/QUOTE]
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