Project Saturn V MK2

[Urwumpe]

More than 251 tons and 14m payload diameter? I buy it.

Can you also include assembly sequence and realistic engine start/stop effects?

 

[Sky Captain]

More than 251 tons and 14m payload diameter? I buy it.

Can you also include assembly sequence and realistic engine start/stop effects?

Core diameter is 12.8 meters not 14 but you can always make an oversize fairing for oversize payloads.

Unfortunately my knowledge of programming is waaaay too little to create a dll for Orbiter vessels so I`m stuck with velcro, multistage2 and spacecraft3 to make Orbiter addons.

---------- Post added 12-02-09 at 11:24 AM ---------- Previous post was 12-01-09 at 06:37 PM ----------

A liquid rocket booster has been developed.


It contains 652 t of fuel and produces 14630 kN of thrust powered by an engine made by clustering together 7 RD 171 thrust chambers.

 

[Urwumpe]

1. RD-171 has 4 chambers, RD-191 has only one chamber. You can't just take the chambers individually since they all share the same turbopump.
2. Wouldn't it be better to just use the RD-170, since it has already almost 7 MN thrust? You could even group two RD-170 on a single booster stage, if you have enough spacing between them.

Don't forget the launch pad - a Saturn V Mk II on a Shuttle pad would be just weird.

 

[Sky Captain]

Well, then a cluster of 7 RD 191 should do or it also might be possible to develop a larger turbopump capable of feeding 7 thrust chambers. Problem with 2 RD 170 is they make the base of the booster 8 meters wide and reduce the amount of space available on the first stage for more boosters. 1 RD 171 don`t have enough thrust since I want the booster to have thrust and diameter comparable to shuttle srb and 7 RD 191 does it perfectly.

---------- Post added at 03:49 PM ---------- Previous post was at 03:47 PM ----------

Regarding the launch pad I think I will use the pad at Ascension island base and later maybe make my own pad.

 

[Urwumpe]

Problem with 2 RD 170 is they make the base of the booster 8 meters wide and reduce the amount of space available on the first stage for more boosters. 1 RD 171 don`t have enough thrust since I want the booster to have thrust and diameter comparable to shuttle srb and 7 RD 191 does it perfectly.

2 RD-170 could do more. Also the diameter of the stage does not need to change, if you use an Atlas like engine set-up. Would maybe look a bit more unusual, but is based on available engines, while a seven engine cluster would be more than just unusual.

Of course, you could also use a tested, but never flown engine, but I assume hypergolic propellants are not your matter of taste today (RD-263).

Remember that the shuttle SRB is a solid rocket, and has a smaller diameter as a comparable liquid propellant rocket for the same fuel mass and thrust. If you reduce the stage mass by half and use a single RD-170 engine, you would get to the Energia booster stages, meaning you would need to put twice as many boosters for the same thrust (but if you optimize for payload, you would actually need less additional thrust - since the fuel has more impulse)

And the Space shuttle boosters and the Energia boosters are actually not classic booster stages, but first stages.

 

[Sky Captain]

Of course, you could also use a tested, but never flown engine, but I assume hypergolic propellants are not your matter of taste today (RD-263).

Hmm LOX/LH2 + LOX/Kero + hypergolics = I think too much trouble to be worth, also hypergolic fuels have lower ISP than LOX/Kero.

2 RD-170 could do more. Also the diameter of the stage does not need to change, if you use an Atlas like engine set-up. Would maybe look a bit more unusual, but is based on available engines, while a seven engine cluster would be more than just unusual.

If two RD 171 goes in then why not add a third one - diameter of the base of the booster remains the same but thrust goes up by 50% I think I will try that.

And the Space shuttle boosters and the Energia boosters are actually not classic booster stages, but first stages.

That`s actually what I thought. For very heavy payloads during liftoff boosters would produce about 60 - 70 % of total liftoff thrust like in case with shuttle or Energia.

---------- Post added at 10:15 PM ---------- Previous post was at 05:31 PM ----------

A new booster is made. with 3 RD 170 it has nearly twice the thrust of a shuttle srb.
Tomorrow will be some test flights.


---------- Post added 12-03-09 at 11:13 AM ---------- Previous post was 12-02-09 at 10:15 PM ----------

Now with 6 boosters and even more stretched first and second stage payload capability has increased to 800 t.

 

[Sky Captain]

So here are all Saturn V MK II versions placed side by side for comparison



I hope to finish everything and upload to O-H next week.

 

[Andy44]

It looks cool, but I can't see calling it a Saturn without F1-derived engines on the first stage...Is the RD-171 bigger in diameter than an F1 or the never-built F1A?

 

[Urwumpe]

Is the RD-171 bigger in diameter than an F1 or the never-built F1A?

No, actually it is even slightly smaller, thanks to the 6 times higher chamber pressure.

 

[Sky Captain]

Just uploaded to Orbithangar.
[ame="http://www.orbithangar.com/searchid.php?ID=4376"]Saturn V MK II[/ame]

I`m also planning to make an Earth departure stage for Moon and Mars missions and some station building scenarios, but that probably will have to wait till Christmas holidays.

 

[Sky Captain]

I have made the Earth departure stage and put together an Apollo style Moon mission using Orion capsule and Moon lander from Francisdrake`s CEV E addon.

 

[the.punk]

Nice.
Have you an idea of an release date?

 

[Sky Captain]

Maybe tomorrow, it`s mostly ready I just have to put together all files and create a zip upload.

 

[Sky Captain]

By attaching a dummy boosters with short burn time and srb exhaust to first stage I have managed to create a smoke effect during liftoff. Also by using a very heavy dummy booster with few seconds burn time and very weak thrust I made a pad hold down feature meaning rocket after main engine ignition will stay attached to pad for few seconds.



To the second stage I added a small srb`s that ignite at stage separation and burns till main engines ignite to represent ullage thrust motors.