ok guys im new on that, i'm working on a desing of the home elevator where i have 1000pounds(including load)(4450 newtons of force) on a traveling room box (room of elevator). i need to lift it to 8 feets high on a time of 15 seconds. im going to use a roller chain with a speed reductor and 110volts electric motor for that. (normally all 110 volts motors run at 1725 rpm's. The issue is that i need to know what ratio(for speed ruductor) i need and how many horsepower the motor must be to lift the load for the avobe specifications. ■