Slides from the very early FCS days of the Multi-Role Armament and Ammunition System (MRAAS) cannon system. A high angle, cleft turret with autoloading and ETC propellent shooting cargo round out to 50km! The cannon used 105mm CTA ammunition with Kinect Energy (Sabot), Multi Purpose (HEAT), and Cargo Round as the three options. Also note the turret's RWS was the 25mm OSCW. Not surprisingly MRAAS proved too advanced even for FCS at the time and it was replaced with the more conventional 120mm MCS variant. Read more in the March-April 2002 Field Artillery Journal.

https://studylib.net/doc/9659966/fcs-multi-role-armament-and-ammunition-atd

MRAAS-Wheeled FCS.png

MRAAS.png


Neat side note, Mark Ford, the program director MRAAS is still working from the Army at ARDEC.

Edit: Found the slides calling for MRASS to be restructured into the more conventional 120mm and separating its BLOS mission into FCS NLOS...

https://ndiastorage.blob.core.usgovcloudapi.net/ndia/2003/gun/cord.pdf
 

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Utron Inc depiction of Combustion Light Gas Gun (CLGG) armed vehicle.
1644787615213.png
I have a feeling that they forgot about the C-130 size constraints :p
 
45mm CLGG: 7.5km/s
Railgun: 4km/s
Conventional Max: 1.8km/s
Utron Inc depiction of Combustion Light Gas Gun (CLGG) armed vehicle.
View attachment 674180
R

Hydrogen for CLGG perhaps.
 
Utron Inc depiction of Combustion Light Gas Gun (CLGG) armed vehicle.
1644787615213.png
I have a feeling that they forgot about the C-130 size constraints :p
Not necessarily. There's a scene in an episode of From the Earth to the Moon, Part 5 'Spider' where Tom Kelly (played by Matt Craven) peers at a model of the LM and says 'Well, we've solved the weight problem. Now we just need to find some teeny tiny astronauts.'

(It's just before one of the scenes in this:
View: https://www.youtube.com/watch?v=erw1mpwK8nY
)
 
June 2004 document on the LV50 turbine for the Future Combat System, FCS was notable for its hybrid drivetrain in which it would have used the LV50 as an electrical generator. About a year later, Detroit Diesel's 5L890 was selected was selected for the FCS Program. With the earlier cancellation of the XM2001 Crusader, the LV50 and LV100 ground vehicle turbines are evolutionary dead ends for the moment.


LV50 2004.png
 
Went on USAHEC, found some old (1998-2000) presentations and reports from the formative period of FCS. Cool, but nothing new or that interesting:

[SLIDE PRESENTATION HANDOUT] FUTURE COMBAT SYSTEMS, DEFENSE ADVANCE RESEARCH PROJECTS AGENCY TECH 2000

Future Combat Systems (FCS) and Future Scout & Cavalry System (FSCS) Briefing

Future Combat Systems Solicitation (FINAL) 32 page report

Developing an Army Position on FSCS and Its Role in FCS, just describes US/UK cooperation approaches ( 4 approaches ). 10 slides.

Sensor Technologies for FCS

Senior Armor Leader Update 19 page slide
https://emu.usahec.org/alma/multimedia/289237/20183164MN001245.pdf (Better, Clearer version of some slides, only 8 out of 19)

[REPORT] FUTURE GROUND COMBAT SYSTEMS 26 pages

Future Combat Systems 23 slides
 

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I was absolutely fascinated by the FCS. In a way, it's too bad the program got cancelled, but Strykers can do most of what FCS was supposed to do. I need to find the old computer or a backup, dig out the big what-if design project I did. Part of it was upgunning the FCS with autocannons to the 50x228mm Bushmaster 3, but built with a 4-way ammo feed: Sabot, PABMx2, and HESH.
 

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