The new A$380($LOL$...$not so new now!$)$ will be double$-$decked and this will necessitate loading

passengers at either one of two different levels. A proposed passenger loading ramp is shown

below. Assume that the ramp weighs $2000$ lb and that there may be a load of $3000$ lb concentrated

at the center of mass of the ramp. Provide a safety factor of $2$ for the actuator force output. It is

desired that the loading ramp move up and down at the same speed and should be able to go from

fully up to fully down in $10$ seconds. Considering the two circuit schematics on the next page,

which would be more suitable for the loading ramp system and why? Assuming a typical value of

efficiency for typical hydraulic pumps, calculate the size $($bore and rod diameter$)$ of the linear

actuators needed. Calculate the hydraulic power required. What is the purpose of the device

labeled A in the hydraulic schematics?

$4.$ The new A$380$ will be double$-$decked and this will necessitate loading passengers at either one of two different levels. A proposed passenger loading ramp is shown below. Assume that the ramp weighs $2000$ lb and that there may be a load of $3000$ lb concentrated at the center of mass of the ramp. Provide a safety factor of $2$ for the actuator force output. It is desired that the loading ramp move up and down at the same speed and should be able to go from fully up to fully down in $10$ seconds. Considering the two circuit schematics on the next page, which would be more suitable for the loading ramp system and why? Assuming a typical value of efficiency for typical hydraulic pumps, calculate the size $($bore and rod diameter$)$ of the linear actuators needed. Calculate the hydraulic power required. What is the purpose of the device labeled A in the hydraulic schematics? $4.$ The new A$380$ will be double$-$decked and this will necessitate loading passengers at either one of two different levels. A proposed passenger loading ramp is shown below. Assume that the ramp weighs $2000$ lb and that there may be a load of $3000$ lb concentrated at the center of mass of the ramp. Provide a safety factor of $2$ for the actuator force output. It is desired that the loading ramp move up and down at the same speed and should be able to go from fully up to fully down in $10$ seconds. Considering the two circuit schematics on the next page, which would be more suitable for the loading ramp system and why? Assuming a typical value of efficiency for typical hydraulic pumps, calculate the size $($bore and rod diameter$)$ of the linear actuators needed. Calculate the hydraulic power required. What is the purpose of the device labeled A in the hydraulic schematics? $4.$ The new A$380$ will be double$-$decked and this will necessitate loading passengers at either one of two different levels. A proposed passenger loading ramp is shown below. Assume that the ramp weighs $2000$ lb and that there may be a load of $3000$ lb concentrated at the center of mass of the ramp. Provide a safety factor of $2$ for the actuator force output. It is desired that the loading ramp move up and down at the same speed and should be able to go from fully up to fully down in $10$ seconds. Considering the two circuit schematics on the next page, which would be more suitable for the loading ramp system and why? Assuming a typical value of efficiency for typical hydraulic pumps, calculate the size $($bore and rod diameter$)$ of the linear actuators needed. Calculate the hydraulic power required. What is the purpose of the device labeled A in the hydraulic schematics?