Strove to present correct science.....REALLY??

Rating: 7/10 (29 March 2018)

Generally the movie was good....lots of quasi-science which, although improbable, didn't stretch the bounds too far but the ending......really?
We're supposed to believe that the rocket nose....in order to save weight, jettisons the hard cap and replaces it with....wait for it....CANVAS.
If you do the math, the only speed quoted, which is BEFORE the maximum thrust, converts to about 2600 kilometers per hour.
Now I've put my arm out the window at about 150 KPH and had the hair nearly blown off so I'm pretty sure 2600 KPH is more than a little improbable.
Since the entire movie is predicated on hoping we will believe at least some of the science why couldn't they have just picked a smaller number to reduce it which didn't entail removing all the windows and the nosecone 'cause I'm pretty sure they'd be necessary at 2600 KPH....just saying.