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Author Topic: SW-era Fuel Cell Engine Vehicles?  (Read 1198 times)

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Smegish

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SW-era Fuel Cell Engine Vehicles?
« on: July 08, 2014, 05:03:49 AM »

Have had this idea bouncing around in my head, figured I would throw it out there to see what others thought.

What if there where FCE versions of all the SW-era ICE equipped vehicles? Sure they would be more expensive but the tonnage saved by swapping the engine - a Vedette frees up 10 TONS for example- could greatly improve their effectiveness. Of course the added cost means they wouldn't be widely used by your average planetary militia, I saw them being used in the regular army armoured units (like those attached to RCT, or are regularly attached to 'Mech units for planetary assaults) or by mercs who want an edge but cant afford/use 'Mechs.

Before I went through the work of modifying all the ICE vees in 3039, though I'd see if people think the idea is stupid or not.
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Takiro

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #1 on: July 08, 2014, 06:29:44 AM »

Well my first concern would be technological availability and maintenance needs that would limit the operational area of such vehicles during this time. If these vehicles were deployed by ComStar on Terra or the Davion Guards on New Avalon then sure I could see it. My other concern would be costs, would there be enough benefit to justify them not just in weight savings but potential destruction. Vehicles are always more vulnerable and placing such rare high tech engines on them make their life span a critical concern to me. Personally I've never used Fuel Cell Engines rather than Internal Combustion Engines in BattleTech being something of a fossil. I didn't realize such a weight savings could be achieved. Its very interesting certainly. I'd like to hear more.
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Smegish

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #2 on: July 08, 2014, 08:48:13 AM »

Well, to further the Vedette example, that 10 tons could be spent in one of 3 fairly simple ways to maintain the AC theme of the machine:

1) A 2nd AC/5 + 1 Ton of ammo, with the remaining tonnage being spent on upgrading the turret ring

2) Trade the existing AC/5 for a AC/10 with 3 tons of ammo, and after again making the turret bigger to fit it leaves you with 3.5 tons of extra armour if my math is right**

or 3) Just add 10 tons of armour. Giving it 16 tons... what a brick  :o

Now options 1 or 3 are probably easiest, and ease the logistical problems if you happen to have a mix of the ICE and FCE versions in the force. Personally I lean towards option 1, maintains the range and ammo load per gun while doubling the firepower. The 8 AC/5's that would come out of a lance of these things is definitely not something to be ignored. Just giving it 16 tons of armour would probably mean people immobilise em and then stay away or rain arty on them.
As for price, that is a bit of an issue, the engine alone adds 380,000 to a vee that is under 750,000 c-bills normally, all up the new twin-AC5 vedette costs 1,037,250 or about a 40% increase. Still 100K cheaper then a standard Bulldog, and on an open field I think I'd prefer 2 AC/5's over a large laser and SRM's, specially as the vedette is a little faster at 5/8.

Tech rating as per Tech Manual is D, just like Fusion engines, but the Availability is a little better the Fusion during the Succession wars, D rather then E. Doesn't match Combustion engines of course, but then no engine is easier to find then an ICE.


**Due to Solaris Skunk Works having issues on my PC for some reason and Heavy Metal Vee not having rules for FCE apparently, I am largely doing this by hand

EDIT: got the availabilities wrong, not sure how when I was staring right at it...
« Last Edit: July 08, 2014, 08:53:16 AM by Smegish »
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JPArbiter

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #3 on: July 08, 2014, 10:06:52 AM »

the technology was there, but given the lack of strategic mobility FC Engines had and "the SLDF can afford it!" I would assume they were 100% Nuclear.
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Smegish

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #4 on: July 08, 2014, 11:23:00 AM »

True, the SLDF could afford whatever the heck they wanted, and they generally wanted big bad fusion powered machines. I was thinking this idea could kick off somewhere during the 2nd/3rd SW, when people were running short of fusion engines for their mechs and so stripped them out of tanks. Swapping out ICE engines is easier as you are adding gear rather then stripping it out of a Fusion powered one, what with most Fusion powered tanks packing energy weapons and Fuel Cells still needing power amplifiers and only coming with the one heat sink and all. A Manticore with a Fuel Cell Engine just wouldn't work for example.

So perhaps the various Vee designers (Looking at you Quickscell) tried to help their respective governments -and their bank balance- by producing up-gunned versions of their Combustion engine machines. Now of course there are machines out there that were made purely because they were dirt cheap *cough*Hetzer*cough* and they probably wouldn't see a fuel cell version, being not worth the expense. Anyone who could afford a Fuel Cell hetzer can afford a better tank to start with.

The strategic mobility issue (450km range instead of 600km) could be somewhat offset by what they use as a fuel source, assuming they are hydrogen fuel cell rather then using something else (HFC's are the only working RL example that springs to mind at 1am) then could they not use the dropship's fuel tanks like the ASF, or do they use something else? Sure it means they cant wander too far from friendly droppers unless you're bringing tankers with you, but if everything that needs fuel uses the SAME fuel then that is one less logistical problem, and supply officers could do with all the help they can get.  ;)
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JPArbiter

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #5 on: July 08, 2014, 03:49:38 PM »

That assumes an H2 Fuel cell uses the same Deturium fuel as a dropship.
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Takiro

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #6 on: July 08, 2014, 04:03:12 PM »

I doubt Quicksell would back this high tech venture, I get the cheap ICE feeling from them most of all. Be interesting if the ComGuards fooled around with the idea for their growing armies.
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drakensis

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #7 on: July 09, 2014, 02:13:46 AM »

Well, here's my take on a Fuel Cell Vedette. You may note it's actually a cost-saver. My reasoning is that changing the engine reduces the weight... so why not take advantage of the fact not to add capacity but to slim down this over-weight puppy - which means needing a smaller engine, which saves more weight... this eventually converges to give us this:

Code: [Select]
Vedette

Mass: 27 tons
Tech Base: Inner Sphere
Motive Type: Tracked
Rules Level: Advanced Rules
Era: Succession Wars
Tech Rating/Era Availability: D/X-D-D
Production Year: 2800
Cost: 523,367 C-Bills
Battle Value: 441

Power Plant: Locum-Pack 135 Fuel Cell Engine
Cruise Speed: 54.0 km/h
Flanking Speed: 86.4 km/h
Armor: ProtecTech 6 Standard Armor
Armament:
    1 Armstrong J11 Autocannon/5
    1  Machine Gun
Manufacturer: New Earth Trading Company
    Primary Factory: New Earth
Communications System: CoMStar Rover
Targeting and Tracking System: ComStar Test-2

================================================================================
Equipment           Type                         Rating                   Mass 
--------------------------------------------------------------------------------
Internal Structure: Standard                      15 points                3.00
Engine:             Fuel-Cell Engine             135                       5.50
    Cruise MP:  5
    Flank MP:   8
Heat Sinks:         Single Heat Sink             1                         0.00
Control Equipment:                                                         1.50
Lift Equipment:                                                            0.00
Turret:                                                                    1.00
Armor:              Standard Armor               AV -  96                  6.00

                                                      Armor     
                                                      Factor     
                                               Front     20       
                                          Left/Right   18/18       
                                              Turret     20       
                                                Rear     20       

================================================================================
Equipment                                 Location    Heat     Spaces     Mass 
--------------------------------------------------------------------------------
Autocannon/5                                 T         1         1         8.00
Machine Gun                                  T         0         1         0.50
@MG (1/2) (100)                              BD        -         0         0.50
@AC/5 (20)                                   BD        -         0         1.00

BattleForce Statistics
MV      S (+0)  M (+2)  L (+4)  E (+6)   Wt.   Ov   Armor:      3    Points: 4
5          1       1       1       0      1     0   Structure:  1
Special Abilities: EE

Same armor, same armament and speed - significantly cheaper. Only slightly bigger than the Scorpion tank in fact - which makes sense as the Vedette's basically an inefficiently larger Scorpion.

Since the Vedette's a NETC product, let's apply the same principle to another of their products, the Karnov:


Code: [Select]
Karnov

Mass: 14 tons
Tech Base: Inner Sphere
Motive Type: VTOL
Rules Level: Advanced Rules
Era: Succession Wars
Tech Rating/Era Availability: D/X-C-D
Production Year: 2800
Cost: 207,093 C-Bills
Battle Value: 86

Power Plant: Locum-Pack 60 Fuel Cell Engine
Cruise Speed: 118.8 km/h
Flanking Speed: 183.6 km/h
Armor: ProtecTech 6 Standard Armor
Armament:
    None
Manufacturer: New Earth Trading Company
    Primary Factory: New Earth
Communications System: CoMStar Rover
Targeting and Tracking System: ComStar Test-2

================================================================================
Equipment           Type                         Rating                   Mass 
--------------------------------------------------------------------------------
Internal Structure: Standard                      10 points                1.50
Engine:             Fuel-Cell Engine              60                       2.00
    Cruise MP:  11
    Flank MP:   17
Heat Sinks:         Single Heat Sink             1                         0.00
Control Equipment:                                                         1.00
Lift Equipment:                                                            1.50
Armor:              Standard Armor               AV -  20                  1.50

                                                      Armor     
                                                      Factor     
                                               Front     6         
                                          Left/Right    5/5         
                                                Rear     2         
                                               Rotor     2         

================================================================================
Equipment                                 Location    Heat     Spaces     Mass 
--------------------------------------------------------------------------------
Cargo, Standard (6.5 tons)                   BD        0         1         6.50

BattleForce Statistics
MV      S (+0)  M (+2)  L (+4)  E (+6)   Wt.   Ov   Armor:      1    Points: 1
11         0       0       0       0      1     0   Structure:  1
Special Abilities: ENE, EE


Again, slight cost-saving and even the chance to slightly improve the lift capacity.
« Last Edit: July 09, 2014, 02:16:05 AM by drakensis »
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Smegish

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #8 on: July 09, 2014, 03:51:37 AM »

Drakensis - Well, my original idea was that the manufacturer would make it easier for themselves to build (And also maximise their own profits) by keeping the machine the same tonnage, so both the ICE and FCE versions have the same chassis with as many parts being shared as possible. Using the engine change to make the whole thing smaller hadn't occured to me, but that also works.

JPArbiter - That is true, and to be honest I have no idea whether it is the case or not, couldn't find any reference one way or the other. Was just a random stab in the dark that could help with the range problem.
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drakensis

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #9 on: July 09, 2014, 04:34:12 AM »

Drakensis - Well, my original idea was that the manufacturer would make it easier for themselves to build (And also maximise their own profits) by keeping the machine the same tonnage, so both the ICE and FCE versions have the same chassis with as many parts being shared as possible. Using the engine change to make the whole thing smaller hadn't occured to me, but that also works.

The vehicle could be the same size, without being the same tonnage, so the majority of parts would be the same. The chassis weighing less would be the main change, mostly represented by less need in the way of structural support for the engine. (the game system makes keeping the weight the same the easiest baseline to stick to but mechanically it should be the hardest). And although the units are lighter and cheaper to build but no less effective, they can be sold for the same price - if not more given their being 'more sophisticated'.

Here are a couple of similar modifications on the same principle:

Code: [Select]
Demolisher

Mass: 65 tons
Tech Base: Inner Sphere
Motive Type: Tracked
Rules Level: Advanced Rules
Era: Succession Wars
Tech Rating/Era Availability: D/X-E-D
Production Year: 2800
Cost: 2,324,025 C-Bills
Battle Value: 965

Power Plant: GM Superload 195 Fuel Cell Engine
Cruise Speed: 32.4 km/h
Flanking Speed: 54.0 km/h
Armor: Durandal 160 Standard Standard Armor
Armament:
    2 185mm ChemJet Gun Autocannon/20s
Manufacturer: Aldis Industries, New Samarkand Metals
    Primary Factory: Terra, Betelgeuse (Aldis), New Samarkand (NSM)
Communications System: Omicron 5000
Targeting and Tracking System: Omicron VII

================================================================================
Equipment           Type                         Rating                   Mass 
--------------------------------------------------------------------------------
Internal Structure: Standard                      35 points                6.50
Engine:             Fuel-Cell Engine             195                      10.00
    Cruise MP:  3
    Flank MP:   5
Heat Sinks:         Single Heat Sink             1                         0.00
Control Equipment:                                                         3.50
Lift Equipment:                                                            0.00
Turret:                                                                    3.00
Armor:              Standard Armor               AV - 160                 10.00

                                                      Armor     
                                                      Factor     
                                               Front     40       
                                          Left/Right   30/30       
                                              Turret     40       
                                                Rear     20       

================================================================================
Equipment                                 Location    Heat     Spaces     Mass 
--------------------------------------------------------------------------------
2 Autocannon/20s                             T         14        2        28.00
@AC/20 (20)                                  BD        -         0         4.00

BattleForce Statistics
MV      S (+0)  M (+2)  L (+4)  E (+6)   Wt.   Ov   Armor:      5    Points: 10
3          1       1       0       0      3     3   Structure:  3
Special Abilities: EE

Code: [Select]
Partisan

Mass: 65 tons
Tech Base: Inner Sphere
Motive Type: Tracked
Rules Level: Advanced Rules
Era: Succession Wars
Tech Rating/Era Availability: D/X-D-D
Production Year: 2800
Cost: 2,113,650 C-Bills
Battle Value: 657

Power Plant: GM Superload 195 Fuel Cell Engine
Cruise Speed: 32.4 km/h
Flanking Speed: 54.0 km/h
Armor: StarSlab/7 Standard Armor
Armament:
    4 Flak Autocannon/5s
    2 Auto Guns Machine Guns
Manufacturer: Kallon Industries
    Primary Factory: Loyalty, Kirklin, Nanking
Communications System: JoLex Systems
Targeting and Tracking System: AntiAir Flak Systems-1

================================================================================
Equipment           Type                         Rating                   Mass 
--------------------------------------------------------------------------------
Internal Structure: Standard                      35 points                6.50
Engine:             Fuel-Cell Engine             195                      10.00
    Cruise MP:  3
    Flank MP:   5
Heat Sinks:         Single Heat Sink             1                         0.00
Control Equipment:                                                         3.50
Lift Equipment:                                                            0.00
Turret:                                                                    3.50
Armor:              Standard Armor               AV -  96                  6.00

                                                      Armor     
                                                      Factor     
                                               Front     22       
                                          Left/Right   18/18       
                                              Turret     22       
                                                Rear     16       

================================================================================
Equipment                                 Location    Heat     Spaces     Mass 
--------------------------------------------------------------------------------
2 Machine Guns                               FR        0         2         1.00
4 Autocannon/5s                              T         4         4        32.00
@AC/5 (40)                                   BD        -         0         2.00
@MG (1/2) (100)                              BD        -         0         0.50

BattleForce Statistics
MV      S (+0)  M (+2)  L (+4)  E (+6)   Wt.   Ov   Armor:      3    Points: 7
3          1       0       0       0      3     0   Structure:  3
Special Abilities: EE, AC 2/2/2

« Last Edit: July 09, 2014, 04:42:27 AM by drakensis »
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Takiro

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #10 on: July 09, 2014, 06:21:21 AM »

NETC was a major supplier of the ComGuards so another reason it could be their idea.
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JPArbiter

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #11 on: July 09, 2014, 05:16:22 PM »

we should also note that the Fuel Cell engine technically never went away, it was just never a standard production engine in the Battletech Eras because fusion power and none fossil based combustible fuels made it... well unneeded.  even in the succession wars ICE was more cost effective and fusion was valueable for vehicles that used energy weapons.  Fuel Cells filled this niche of weight savings at a sufficent cost hike that most did not consider because it did not make for a good "bduget vehicle" like ICE would.

  I would not be surprised though if Fuel Cell Pedestrian vehicles and Civil Service Vehicles were the Norm on sufficiently developed worlds.
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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #12 on: July 09, 2014, 08:12:48 PM »

I personally love the Fuel Cell I almost always look at it was an alternative to fusion or ICE if at all possible.  One of my personal bugbears is a fusion design with no laser armament you're wasting g your 10 heats for nothing.

For me Fuel Cell variants during the Succession Wars wouldn't completely replace ICE but with frontline commands or organisations like ComStar it's something I'd have liked to see more of

Looking at the newer books that have come out Fuel Cells have begun to show their presence but not an overwhelming one.  I kinda like how they haven't been used like improved jump jets when they appeared on the scene (on every unit they could go on)

Drakensis I like those ideas lighter but no different combat wise quite cool.  Alternatively you could do them the same tonnage but have heaps of cargo space not good combat wise but tactically could be useful
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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #13 on: July 10, 2014, 02:19:28 AM »

It doesn't always save costs, admittedly. I tried it with the Monitor Naval Vessel and despite cutting 10 tons of weight, the result still cost a quarter million more than the ICE model.
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Smegish

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Re: SW-era Fuel Cell Engine Vehicles?
« Reply #14 on: July 10, 2014, 05:35:33 AM »

Or instead of cargo space, Infantry bays for everybody! Reduce the risk of whole platoons getting wiped out in one fell swoop by not putting all 28 men in the one coffi-er APC!  ;D Or to combine with your usual Maxims or other APCs for a great big shell game, which tanks are the PBI's huddling in this time?

Could also go the other way, and put Fuel Cells in some of the Fusion-powered tanks that dont really need all that power for anything other then combat radius, like the Von Luckner or Rommel/Patton. Free up more of those fusion engines for the big shiny 'Mechs and stuff.
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