Analysis
One of the main requirments of this device was to acheive at least a 75% quicker system when operating between field mode or road mode. The analysis is presented below.
In the standard manual mode it takes approximately 45 seconds to setup. With this design being hydraulically operated through the hydraulics of the tractor, the max flow is 20.1 GPM. Figure A-6 shows the calculations of the speed at which the hydraulics would operate at maximum flow. With the 3 inch diameter piston the extend speed 10.94 inches per second. The retract speed is 13.25 inches per second. With a 10 inch stroke this gives a maximum extend time of .91 seconds and the maximum retract speed of .8 seconds. Although the tractor will not be run at maximum flow for this design, it will reduce the setup time by far more than 75%. To achieve a 75% quicker set up time the pump must run at least 2 GPM.
