import krpc
import time

ksp = krpc.connect("mission")
vessel = ksp.space_center.active_vessel

vessel.control.activate_next_stage()
rate = .5
runtime = 0
print(vessel.name)
while True:
    alt = vessel.flight().surface_altitude
    vel = vessel.flight().velocity
    print(alt, vel)
    time.sleep(rate)
    runtime += rate
    if runtime >= 20: break



### OUTPUT

6.313085445668548 (0.0, 0.0, -0.0)
12.046892253332771 (0.0, 0.0, 0.0)
20.826587891904637 (0.0, 0.0, 0.0)
32.28993574366905 (0.0, 0.0, 0.0)
47.414433999569155 (0.0, 0.0, -0.0)
66.61385930585675 (0.0, 0.0, 0.0)
88.43420651182532 (0.0, 0.0, -0.0)
114.64470696996432 (0.0, 0.0, 0.0)
143.25105959514622 (0.0, 0.0, -0.0)
175.20684752019588 (0.0, 0.0, -0.0)
213.53636101831216 (0.0, 0.0, -0.0)
254.19105367432348 (0.0, 0.0, 0.0)
298.53043716505636 (0.0, 0.0, 0.0)
346.5914090049919 (0.0, 0.0, 0.0)
400.4619472469203 (0.0, 0.0, 0.0)
453.9565447544446 (0.0, 0.0, -0.0)
510.95602489600424 (0.0, 0.0, 0.0)
573.9412787802285 (0.0, 0.0, 0.0)
638.1469042086974 (0.0, 0.0, 0.0)
705.8979701463832 (0.0, 0.0, 0.0)
780.1264723956119 (0.0, 0.0, 0.0)
855.1955284841824 (0.0, 0.0, -0.0)
937.0946776309283 (0.0, 0.0, 0.0)
1019.5495318705216 (0.0, 0.0, 0.0)
1105.705950605101 (0.0, 0.0, 0.0)
1191.862783777644 (0.0, 0.0, 0.0)
1289.038467601291 (0.0, 0.0, 0.0)
1382.3331749073695 (0.0, 0.0, -0.0)
1479.0889110729331 (0.0, 0.0, -0.0)
1579.3222781658405 (0.0, 0.0, -0.0)
1687.425831632805 (0.0, 0.0, 0.0)
1808.4537453873781 (0.0, 0.0, 0.0)
1924.5125625340734 (0.0, 0.0, -0.0)
2044.4492879384197 (0.0, 0.0, 0.0)
2168.195567997871 (0.0, 0.0, -0.0)
2301.0457015089924 (0.0, 0.0, 0.0)
2438.0816471729195 (0.0, 0.0, -0.0)
2579.3647261622828 (0.0, 0.0, 0.0)
2724.891350230784 (0.0, 0.0, 0.0)
2868.8312082176562 (0.0, 0.0, 0.0)