Acceleration and Gravity(North Polar BL2)
Acceleration: This simulation allows you to blast off from the north pole of earth into deep space where the ships ion engines can take over vehicle propulsions. Blastoff simulates a booster rocket that provides high acceleration of 20.4 g-force (200m/sec/sec) straight up from north pole of earth into outer space. The Acceleration of gravity is 9.806 meters per second per second downward (-Y direction) at zero elevation and is a function of Y. When elevation = 0, Y = 6353 kilometers (radius of earth). Type in the ship orientation ( force direction) and thrust duration, and then click ENTER button. This enters desired course and duration into the spaceship ion propulsion engine control computer. The computer uses the accelerometer sensor inputs to regulate thrust so as to maintain desired acceleration. Engine burn does not begin and Time does not change until an Engine Control Button is clicked. The STOP ENGINE button advances time by an amount specified (Thrust Duration as entered) at zero thrust and zero fuel consumption. During the stop engine period the spaceship will be in freefall, and it will continue to move under the influence of gravity which varies with elevation. Elevation = Yposition - 6353.
Start by launching the spaceship
straight up (90 degrees) with a blast off 20.4 g-force for a period between 60 and 69 seconds and then
press STOP ENGINE for periods of 1000,10000,100000, and 1000000 observing freefall motion of spaceship.
Continue clicking STOP ENGINE until "Time (in kilo-seconds&Days)" exceeds 365 days indicating escape or until "Course(degrees)" reverses. indicating the spaceship has not escaped planets gravitational field. Note that blast off occurs
far below surface of earth. Now blast of for the minimum duration that resulted in escape velocity and then click STOP ENGINE repeatedly for six second intervals until surface of planet is approached and then make final surface approach at 1
second intervals until surface of planet is reached. The velocity at this moment should approximate the known 11.186 km/sec earth escape velocity.