An apparatus includes a base frame, first and second bins, first and second hydraulic assemblies, and a computer controller. The first hydraulic assembly is configured to selectively raise and lower the first bin relative to the base frame. The second hydraulic assembly is configured to selectively raise and lower the second bin relative to the base frame. The first and second hydraulic assemblies are individually actuable, and their actuation is coordinated by the controller. In another aspect, a method for transferring product using an apparatus includes inputting to a computer controller a first threshold rate of change in weight signals of a weight sensor; relaying a plurality of weight signals from the weight sensor to the controller; calculating a determination by the controller at least in part on whether the threshold rate of change has been exceeded; and automating actuation of a hydraulic assembly based on the determination.

A device for adjusting a center of gravity is provided. The device can measure a change and/or distribution of a load in a vehicle. The device can adjust a center of gravity to ensure control stability and maintain balance in an aircraft. The device may include: a movable plate configured to support cargo in a cargo hold; a plurality of air bearings disposed between the movable plate and a bottom of the cargo hold and configured to support and/or float the movable plate; and a first driving unit installed in the cargo hold and connected to the movable plate. The first driving unit may be configured to move the movable plate, if the movable plate is floated.