I have a projection screen that weighs 16.5 pounds. How much torque or what kind of motor do i need?

My projection screen is connected to an aluminum pipe that is 7 feet long and the entire setup is 16.5 pounds. I want to make a setup which allows me to put an electric motor on it to roll it up when i'm done and back down when i need it again. What kind of motor or how much torque is required to pull it up?