Hello all, I need to design an automated trap door opener incorporating a motor and at least one of the following: gears, springs, or power screws. It is 36 inches wide and 48 inches long. It is hinged along its width. The door weighs 60 pounds. When closed it is flush with the floor. It must rotate to 110 degrees when opened in 20 seconds. I've calculated how much power I would need to rotate the door at the angle and time constraint, but I do not know how to execute the design. I was thinking of using a linear actuator but I'm not sure how to incorporate that with the wide opening angle of the door. Linear actuators I have seen used to open doors so far have opened too slowly and at most 90 degrees. Any help would be appreciated, thank you !