m=1kg

V respect to electric engine's stative

R- earth center distance

R = 6400 000 meters

m*V^2 /R = m*g


V^2 = R * m*g / m

V^2 = R*g = 64000000

V = 8 000 m/s


What mean above equation ? please study Ytube

http://youtu.be/HXKwNvA8VHs