# Estimate of how fast will the Starship/Super Heavy be moving 5 and 10 seconds after liftoff?

I am wanting to make a comparison of the expected initial seconds of the ascent of the Starship/Super Heavy compared to the similar time of the Saturn V ascent.

If this chart (from a NASA space math document) of the Saturn V Rocket Launch Speed and Height is correct, the Saturn V was initially moving at a pedestrian rate and was only at highway speeds after 10 seconds. Is there an estimate of how fast the Starship/Super Heavy would be moving 5 and 10 seconds after liftoff?

• Probably similar. If your thrust to weight ratio at liftoff is more than about 1.2, it means you didn’t bring enough fuel. Jan 1 '20 at 1:25
• The speed after the first second was 3 m/s or 10.8 km/h, faster than a pedestrian. But initial speed was 0.
– Uwe
Jan 2 '20 at 15:13

Teslerati's September 2019 article states a T/W ration of 1.5 is desirable. Calculating an estimated table for the first few seconds of flight is trival, as one can assume the mass is constant (it isn't), and the direction is straight up • Should I assume the units are in m/s? Jan 1 '20 at 12:40
• They are @Bob516 - I could redo it in furlongs per minute if you would prefer?
– user20636
Jan 1 '20 at 13:00
• space.stackexchange.com/q/39858/12102
– uhoh
Jan 1 '20 at 13:05
• "Calculating an estimated table for the first few seconds of flight is trivial." Is it simply F=ma? If it is, I should've realized it myself. Jan 1 '20 at 13:06
• oops, it was a link off the OP's Wikipedia link @uhoh, good catch
– user20636
Jan 2 '20 at 0:34