Hi, I need a little help with this problem with compound planetary gears. I don't know how to apply the formulas for this specific type of placement. I need to know the final speed of the engine knowing the number of teeth z1 = -104 ring gear which is internal, z2,3,4 = 22 for small planets, z5,6,7 = 65 for large planets, z8 = 17 for the small sun, z9 = 95 for the big sun and z10 = 13 for spool gear. A weight of 12kg will be attached to the ring gear on one side and 2kg of counterweight on the other from a height of 2 m. I want to calculate the speed and torque that the engine will have if I want the weight to fall within 20 minutes from the 2m. And i also need the ratio that the system have. The modulus of the wheels is 0.8 and the pressure angle is 20. I also know that the spool from the z10 have diameter equal to 30 mm and the one from the motor have 15 mm. These are the data I know and don't really know how to apply it. Can someone help me?