Search Ares V

[Puma]

Here is the official pic from the NASA web site (as it should be)
http://www.nasa.gov/images/content/206402main_jsc2007e113280.jpg
it has a little difference from the previous one..in the down side part..it doesn`t look like a box..so you are right in that way..but also download the
http://www.nasa.gov/pdf/289914main_fs_altair_lunar_lander.pdf
this doc shows a pic bellow that seems like is the same concept but the box type is in the back side..remember also that the Altair lander will be used as lander for manned missions and also for transport many things to the moon surface like the actual existing Lunar Electric Rover...if you see the manned mission pic shows long tanks in the bellow of the lander ...the first pic that could be for transport does not show them and is logical because if you send an Lunar Electric Rover or other cargo to the moon you will not need Oxygen..it makes a lot of sense..but either one you want to create will be great because the actual Altair for Orbiter does not look like neither of those..(see attachment)
you could at least change the gold color to a silver color..I think I like a lot the new design much better...

 

[Columbia42]

That's what I thought. Thanks a lot.

BTW, does anyone know the separate propelent masses for the ascent and descent stages of the lander? What about the ISP of both stages?

 

[Puma]

Ascent Stage mass 6141 kg (13,510 lbs.)
Descent Stage mass 37,045 kg (81,500 lbs.)
for more info read the doc:
http://www.nasa.gov/pdf/289914main_fs_altair_lunar_lander.pdf

 

[Columbia42]

All I need is the ISPs for both stages and I'll be finished!

 

[Puma]

could you upload a beta of the new altair for test?

 

[Columbia42]

Not until I have the ISP of the stages. The addon won't work without it.

 

[santy86]

It seems that NASA wanted to use an improved version of the RL-10B engine called CECE
(if the whole constellation program won't be cancelled)

http://en.wikipedia.org/wiki/RL10

I also found this detailed description of RL-10 engines
http://www.spaceandtech.com/spacedata/engines/rl10_specs.shtml

RL-10B Isp = 464s (I suppose in vacuum, cause that's too high for atmospherical Isp)

 

[Columbia42]

What about the ISP of the CECE?

 

[Urwumpe]

What about the ISP of the CECE?

Is that really so hard to ask the manufacturer?

http://www.pw.utc.com/Products/Pratt+&+Whitney+Rocketdyne/CECE

450-465 s (actually lbf*s/lbm)

 

[Columbia42]

At long last, I'm almost done with this addon. All I need is the attitude thrust for the lander. Also, I have the EDS's attitude thrust at 980N but it's way to low to provide good manuevering capabilities. Does anyone have a different figure for that?

 

[Urwumpe]

At long last, I'm almost done with this addon. All I need is the attitude thrust for the lander. Also, I have the EDS's attitude thrust at 980N but it's way to low to provide good manuevering capabilities. Does anyone have a different figure for that?

Can't tell you, but it is likely they use the same thrusters as for the Ares-I RoCS. It is in the fitting thrust range, just like the Space Shuttle Orbiter PRCS.

 

[Columbia42]

And what's the thrust of those?

 

[santy86]

RoCS thrust is 625 lbf

That's about 2780 Newtons

http://www.nasa.gov/pdf/315427main_feb2709_wkly_summary.pdf

 

[Columbia42]

Is that per thruster or all of them combined?

 

[santy86]

I suppose it is per thruster. That would work well on the EDS. As you said before 980N is not enough.

About the lander I don't know, but you could test it with some values by putting the lander on the moon or in moon's orbit.

 

[Columbia42]

At long last, the next beta:
View attachment 4167

 

[Istochnikov]

CTD at EDS separation...

Sugestion:

Instead of

[PAYLOAD_0]
MESHNAME="Altair"
NAME=Altair
OFF=(0,0,22.61)
MASS=45000
MODULE=spacecraft/spacecraft3
SPEED=(0,0,0)
ROT_SPEED=(0,0,0)

Deifne the Altair as:

[PAYLOAD_0]
MESHNAME="Altair_descent;altair_Ascent"
NAME=Altair
OFF=(0,0,22.61;0,0,25.31)
MASS=45000
MODULE=spacecraft/spacecraft3
SPEED=(0,0,0)
ROT_SPEED=(0,0,0)
RENDER=1

on EDS config file AND EDS/Altair Stack as

[PAYLOAD_1]
off=(0,0,43;0,0,65.61;0,0,68.31)
Mass=329100
Meshname="Ares & Orion/eds;Altair_descent;Altair_Ascent"    
Name="EDS"
Module="spacecraft/spacecraft3"
SPEED=(0,0,5)
RENDER=1

on Ares 1 config File

 

[Columbia42]

Thanks for the suggestion Istochnikov. It turns out I left a file out of the zip. Here's the new beta: View attachment 4173

 

[Columbia42]

The latest beta of the Ares V:
View attachment 4242
The custom exhaust textures were supposed to be in a previous release but I forgot to put the texture files in.

 

[Columbia42]

Quick question: are the booster parameters (fuel mass, empty mass, thrust, etc.) for multistage2 per booster or are they for all of the boosters combined?