But you say it's been done before.... So the information should be available to you to win this challenge
Yes, I did didn't I!
So have a look at:
Saturn V Launch Simulation by Robert A. BraeunigHere are an excerpt on the make up of launch mass:
The Saturn V
Bulk Parameters & Thrust
From Apollo by the Numbers - Ground Ignition Weights, we obtain the following launch vehicle mass data:
Ground Ignition Time: -6.4 sec
S-IC stage, dry: 287,531 lbm
S-IC stage, oxidizer: 3,305,786 lbm
S-IC stage, fuel: 1,424,889 lbm
S-IC stage, other: 5,442 lbm
S-IC stage, total: 5,023,648 lbm
S-IC/S-II interstage, dry: 11,477 lbm
S-II stage, dry: 79,714 lbm
S-II stage, oxidizer: 819,050, lbm
S-II stage, fuel: 158,116 lbm
S-II stage, other: 1,260 lbm
S-II stage, total: 1,058,140 lbm
S-II/S-IVB interstage, dry: 8,076 lbm
S-IVB stage, dry: 24,852 lbm
S-IVB stage, oxidizer: 192,497 lbm
S-IVB stage, fuel: 43,608 lbm
S-IVB stage, other: 1,656 lbm
S-IVB stage, total: 262,613 lbm
Total Instrument Unit: 4,275 lbm
Spacecraft/Lunar Module Adapter: 3,951 lbm
Lunar Module: 33,278 lbm
Command and Service Module: 63,507 lbm
Total Launch Escape System: 8,910 lbm
Total Spacecraft (CSM): 109,646 lbm
Total Vehicle: 6,477,875 lbm
I'll let you look up the rest on
Propellant Utilization with information derived from
Apollo by the Numbers - Launch Vehicle Propellant Use.
Then all the detail on the "simulation". Of course, you could get all the data directly from the NASA site and do it yourself.
Anders Bj๖rkman, Naval Architect, might be an expert on marine safety but seems understands virtually nothing on rocket science and re-entry.
Hence all he does is dismiss it as impossible and ridicules everything.
He's the sort of person who ridicules anything he can't understand. What any reasonable person would do is research it enough to see if it sounds feasible.
But one person cannot understand it all and do all the necessary calculations and design - why else would NASA have used the services of some 400,000 scientists and engineers.
It's not as if it's that difficult, it's only
Rocket Science plus a tremendous lot of other detail including astronomical data to know exactly where the moon would be at the relevant time.