Help please
Rocket-s-Euler.sm (87 КиБ) скачан 192 раз(а).

EK45 was Deified by Mathematica
Working code included.
Jean

Rocket-s-Euler.sm (122 КиБ) скачан 222 раз(а).

Thanks.
I have corrected myself
Rocket-s-Euler-RK.sm (87 КиБ) скачан 175 раз(а).
New question
Why this not works
Rocket-s-Euler-RK-full.sm (88 КиБ) скачан 177 раз(а).

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 КиБ) скачан 190 раз(а).

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.