Help please
Rocket-s-Euler.sm (87,43 KiB) descargado 1619 vez(es).

EK45 was Deified by Mathematica
Working code included.
Jean

Rocket-s-Euler.sm (122,44 KiB) descargado 1615 vez(es).

Thanks.
I have corrected myself
Rocket-s-Euler-RK.sm (87,35 KiB) descargado 1516 vez(es).
New question
Why this not works
Rocket-s-Euler-RK-full.sm (88,8 KiB) descargado 1567 vez(es).

Your RK does work! Your Euler doesn't because you have defined the acceleration term to have two input variables, but only call it with one in the Euler routine!

Rocket-s-Euler-RK-full.sm (89,85 KiB) descargado 1565 vez(es).

Wrote

Your RK does work! Your Euler doesn't because you have defined the acceleration term to have two input variables, but only call it with one in the Euler routine!

Tanks!

Send me please the corrected file.

Wrote

Wrote

Your RK does work! Your Euler doesn't because you have defined the acceleration term to have two input variables, but only call it with one in the Euler routine!

Tanks!

Send me please the corrected file.

I've now added the corrected file to my earlier reply.