OHM Moonbase Alpha Expansion Pack 1

[OrbitHangar]

Author: bensisko

Moonbase Alpha Expansion Pack 1​

Create Moonbase Alpha 101027v1.2 by installing this package over
Moonbase Alpha 101027v1.1. It requires Moonbase Alpha 101027v1.1

Unzip Moonbase Alpha Expansion Pack 1 to the location of your Moonbase
Alpha 101027v1.1 folder. Be sure to preserve the directory structure
of the package (for example, in WinZip this re-quires activating the
“Use Folder Names” option).
 
Moonbase Alpha 101027v1.2
• Adds Centuri Space Docks, Mark IX Hawk, Ultra Probe, and Meta Probe
• Adds Storage Area J-3
• Upgrades Moonbuggy to UCGO capability
• Creates additional Space: 1999 specific cargo
• Corrects scenario dates to occur prior to September 13, 1999
• Resolves UMmu bounce
• Updates Operations Manual
 


DOWNLOAD

 

[streb2001]

I do like the look of those new ships!

Does your Moonbase Alpha addon include Eagles or are they a separate download?

Nice work.

 

[gattispilot]

No, You have to installed the first part: Moonbase Alpha 101027v1.1

"Create Moonbase Alpha 101027v1.2 by installing this package over
Moonbase Alpha 101027v1.1. It requires Moonbase Alpha 101027v1.1"

 

[streb2001]

No, You have to installed the first part: Moonbase Alpha 101027v1.1

"Create Moonbase Alpha 101027v1.2 by installing this package over
Moonbase Alpha 101027v1.1. It requires Moonbase Alpha 101027v1.1"

That's what I mean; are the Eagles included in Moonbase Alpha 101027v1.1?

 

[gattispilot]

That's what I mean; are the Eagles included in Moonbase Alpha 101027v1.1?

Yes.

 

[Axel]

The new ships are very nice, but the UltraProbes have to unrealistic Isp/dV.
What kind of drive do they use? I did not translate the "terra" values in dV, but it seems to many times the speed of light.

 

[gattispilot]

Here is the info about her:
http://www.space1999.net/catacombs/main/models/w2multramission.html

Not sure what I have it set to in the dll. I can check it when I get home later today.

 

[jinglesassy]

The probe can beat ultraprobes

 

[Axel]

@gattispilot
Thank you very mutch for the super webside!
There i can read that the Ultraprobe is nuclear powered and needs 2-3 years for complet venus or mars mission. And 8 Month for reaching the outer solar system. I think its solid core nuclear powered, because its typical nozzles and the knowlegde of the year when film was released. Plasma drives came later, but ofcorurse you could set a plasma drive Isp value for more fun and for paying tribut for todays technology. Im sure, if this had exists when film was released, they had used it too.

For findind the optimal/realistic Isp you should use this side.
http://www.projectrho.com/rocket/

If your addon would be in spacecraft3 i had reconfigured it.

 

[gattispilot]

Thanks. Here is what we have it for the rear section:

SetSize (58);//117
	SetEmptyMass (420000.0);
	SetCameraOffset (_V(0,0,59));
	SetCameraDefaultDirection (_V(0,0,1));
	InitNavRadios (4);
	SetRotDrag (_V(0.2, 0.2, 0.05));
	SetCW (0.35, 0.35, 2, 6);
	SetCrossSections (_V(1297.55,1300.7,.57));
	SetPMI (_V(272, 285, 16));
	EnableTransponder (true);

and

const double FUELMASS = 500000;
const double ISP = 11e12;
const double MAXMAINTH = 130000000;
const double MAXRETROTH = 130000000;
const double MAXRCSTH = 1666660;

for the CM

SetSize (21);
	SetEmptyMass (4200.0);
	SetCameraOffset (_V(.6,0,5.7));
	SetCameraDefaultDirection (_V(0,1,0));
	SetTouchdownPoints (_V(0,-1,-7), _V(-1.6,1,-7), _V(1.6,-1,-7));
	InitNavRadios (4);
	SetRotDrag (_V(0.2, 0.2, 0.05));
	SetCW (0.35, 0.35, 2, 6);
	SetCrossSections (_V(200,30,30));
	SetPMI (_V(57.90, 54.34, 17.13));
	EnableTransponder (true);

and

const double FUELMASS = 300;
const double ISP = 430000000;
const double MAXMAINTH = 9000;
const double MAXRETROTH = 9000;
const double PB_MAXRCSTH = 1000;

 

[Axel]

Isp is definitely to high, a kind of unrealistic unobtanium afterburner or warp drive. Please fix it, when it should be a near future ship or from 1999.
The other values seem to be ok.

 

[gattispilot]

What should they be?

 

[BenSisko]

Gattispilot,
Check this page
http://www.projectrho.com/rocket/realdesigns.php#Nuclear_DC-X

 

[gattispilot]

Thanks. But I guess I'm not seeing any values?

 

[BenSisko]

Its embeded in the text. Look at this
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA426465&Location=U2&doc=GetTRDoc.pdf
Section 3.4 pp 40-57

 

[gattispilot]

Thanks. So would it be a LANTR engine? It looks like:
Nuclear DC-X comes in two “nuclear flavors”:
1. Pellet Bed Reactor (PeBR) NTR
a) Performance in pure NTR mode:
? Isp ≈ 1,000 seconds
? Thrust = 1,112 kN/engine
? Thrust/Weight > 12
? vex (exhaust velocity) = 9.8 km/sec
b) Performance in LANTR mode:
? Isp ≈ 600 seconds
? Thrust = 3,336 kN/engine

? Thrust/Weight > 38
? vex = 5.9 km/sec
2. Thin-Film Fission Fragment Heated NTR

• Theoretical Isp = 2,000 – 4,000 seconds
• Thrust is comparable to a conventional NTR
• Fission Fragment LANTR mode performance is comparable to the PeBR LANTR mode
performance

 

[BenSisko]

I'd look at the projected misssion and timeframe then pick the rocket motor with the closest Isp to fit the mission.

 

[gattispilot]

I may need help on that.

Here is the Metaprobe info:

SetSize (67);
	SetEmptyMass (4500000.0);
	SetCameraOffset (_V(2,3,11.9));//31
	InitNavRadios (4);
	SetRotDrag (_V(0.2, 0.2, 0.05));
	SetCW (0.35, 0.35, 2, 6);
	SetCrossSections (_V(250,600,38));
	SetPMI (_V(272, 285, 16));
	EnableTransponder (true);

const double FUELMASS = 500000;
const double ISP = 11e12;
const double MAXMAINTH = 13000000;
const double MAXRETROTH = 13000000;
const double MAXRCSTH = 166666;

 

[Axel]

goto http://www.projectrho.com/rocket/enginelist.php
then right "Engine list"

There you can see that a realistic Isp value would be between 10 000 and 50 000 m/s for your vessel.
10 000m/s for a pure solid core NTR, up to 20 000 m/s for a liquid core NTR and up to 50 000 m/s for a gas core NTR.
Todays plasma rocket prototypes (VASIMR) are reaching 50 000 m/s too in high thrust mode, up to 300 000 m/s in low thrust mode. But they needing mutch more electrical power than NTRs and the nozzles are different, your vessel looks more like NTR.
BenSisko is doing well, when he calculates a right Isp value in relation to the given mission times, im not so good in calculatings, i had to fly the missions many times until i get the right Isp, but i have not that time at the moment.
On the other side, i registered that the eagle shuttles have 240 000 m/s Isp, that is to mutch too, your vessel would have only a little more dV, but its an interplanetary transfer vessel and eagles are short range high thrust shuttles, that can't be. So reduce the value from the eagles or set the same value of 240 000m/s to your vessel. But i guess the eagles are copyrighted, so set 240 000 m/s to your ultraprobe, its a nice value for the solar system. But reduce the thrust to 500kN or less. The RCS is a way to strong too, 10 or 25% of the actual RCS value are enough, your some hundret tonnes vessel is rotating like a combat jet.

 

[gattispilot]

Thanks. try this new dll
it will unzip to C:\orbiter2010p1/modules/ultraproberear.dll

Make sure to back the original.

const double FUELMASS = 500000;
const double ISP = 240000;//11e12
const double MAXMAINTH =500000;//130000000
const double MAXRETROTH = 500000;
const double MAXRCSTH = 41665;//1666660