There is no simple answer to this question, but you have to understand that the 1000 kg (2200 lb) pulling capacity is the peak that the PCW5000 engine will give out, and at that point, it is very close to stalling. Also, there is the aspect of friction. On flat ground, you need more force than the mass of the log to move it. At 45-50 degrees – that is very steep, then you don’t have much friction. But you have to worry about the load going back down – so you should be using a self-locking pulley to secure it, unless you use the PCW4000 model. Our guess is that you will be able to raise a load of 450 kg (1000 lb) up a 45-degree incline at 12 m/min (40’/min). So, it should take about 8 minutes to bring it in. If you absolutely need to bring up the 900 kg (2000 lb) load, you have to install a pulley at the load and double the force. It will take twice as much rope, which means the pulling time will double. But as you bring up twice as much each pull, the productivity is the same. And yes, it can work for 8 hours a day. The only thing you must monitor, especially on long, hard pulls, it that the drum does not get too hot from friction with the rope. It could lead to rope degradation or even melting the rope in extreme cases. The drum can be cooled down with water if necessary.