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PostPosted: Wed Jan 21, 2015 5:46 pm 
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Supreme Mugwump
Supreme Mugwump

Joined: Wed Dec 06, 2006 3:42 pm
Posts: 3183
Code:
BattleMech Technical Readout
                        UB Weapons

Type/Model:    Backpacker 
Tech:          Periphery/ 3025
Config:        Biped BattleMech
Rules:         Level 3, Standard design

Mass:          100 tons
Chassis:       Standard
Power Plant:   300 Turbodiesel
Walking Speed: 32,4 km/h
Maximum Speed: 54,0 km/h
Jump Jets:     None
Jump Capacity: 0 meters
Armor Type:    Standard
Armament:      
  2 LRM 20s
  2 Large Lasers
  10 Thunderbolt (OS)(UB)s
Manufacturer:  (Unknown)
  Location:    (Unknown)
Communications System:  (Unknown)
Targeting & Tracking System:  (Unknown)

--------------------------------------------------------
Overview

The Backpacker  is the product of the impossibility to obtain fusion engines, combined with the ingenuity of the engineers that were used to do without high-tech.
Two problems were to be solved:
1. the high weight of an ICE- engine
2. the removal of heat

to solve the first problem a comercial engine from a caterpillar was turbo-charged. there were two stages of turbocharger with an intercooler each. 
The cooling was harder to achieve, to solve this problem a cooler was attached to the mech like a backpack. This was done because the cooling system uses Air that has to be entering and leaving somewhere.
the cooling backpack has strong fans at the top that blow air down through the surfaces of the radiators, as well as the intercoolers ribs.
the main drawback of the system is that it only works in athmosphere, but that is no disadvantage as ICE-engines are limited to athmospheres anyway.
the entire system, combined with the engine and fuel for 24hours of operation , weighs exactly the same that a conventional fusion system weighs.
it also turns out to be costing exactly the same.

the weapon arrangement had to be arranged around the cooling system, this is the reason why the LRM-lauchers(together with 12 salvos of ammunition) are arranged in the arms, so the exhaust would not interfere with the coolers.
the Thunderbolts are launched from fixed tubes that are located under the cooling backpack, this is also the reason why the cooling- fans blow downwards, as this way no exhaust- gasses would be sucked into the coolers.
--------------------------------------------------------
Type/Model:    Backpacker 
Mass:          100 tons

Equipment:                                 Crits    Mass
Int. Struct.:  152 pts Standard              0     10,00
Engine:        300 Turbodiesel               6     19,00
   Walking MP:   3
   Running MP:   5
   Jumping MP:   0
Heat Sinks:     1 Backpack unit [24]   0      2,00
Gyro:                                        4      3,00
Cockpit, Life Supt., Sensors:                5      3,00
Actuators: L: Sh+UA+LA+H    R: Sh+UA+LA+H   16       ,00
Armor Factor:  304 pts Standard              0     19,00

                          Internal    Armor
                          Structure   Value
   Head:                      3          9      
   Center Torso:             31         44      
   Center Torso (Rear):                 15      
   L/R Side Torso:           21      32/32      
   L/R Side Torso (Rear):            10/10      
   L/R Arm:                  17      34/34      
   L/R Leg:                  21      42/42      

Weapons and Equipment    Loc  Heat  Ammo   Crits    Mass
--------------------------------------------------------
1 LRM 20                 RA      6   24      9     14,00
  (Ammo Locations: 2 LA, 2 RA)
1 LRM 20                 LA      6           5     10,00
1 Large Laser            RT      8           2      5,00
5 Thunderbolt (OS)(UB)s  RT     30           5      5,00
1 Large Laser            LT      8           2      5,00
5 Thunderbolt (OS)(UB)s  LT     30           5      5,00
--------------------------------------------------------
TOTALS:                         28          59    100,00
Crits & Tons Left:                          19       ,00

Calculated Factors:
Total Cost:        14.576.000 C-Bills
Battle Value 2:    2.162 (old BV = 1.933)
Cost per BV2:      6.741,91
Weapon Value:      3.830 / 3.830 (Ratio = 1,77 / 1,77)
Damage Factors:    SRDmg = 35;  MRDmg = 22;  LRDmg = 11
BattleForce2:      MP: 3,  Armor/Structure: 8/8
                   Damage PB/M/L: 4/4/2,  Overheat: 1
                   Class: MA;  Point Value: 22
                   Specials: if
the abilities of this mech are identical of what can be achieved with a Fusion engine with integrated DHS, the main difference(rulewise) is that it has to be refuelled before battle, and that it cannot operate in vacuum. it Needs a normally dense(for cooling) oxigen containing athmosphere.

_________________
typos and spelling-mistakes are property of the finder. english is not my mother-tongue.


Last edited by cobayashimaru on Thu Aug 20, 2015 4:11 pm, edited 2 times in total.

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PostPosted: Tue Aug 18, 2015 5:16 pm 
Offline
Supreme Mugwump
Supreme Mugwump

Joined: Wed Dec 06, 2006 3:42 pm
Posts: 3183
after revisiting the Super-Nova i thought it would be interesting to use the AIR-cooling-idea for high heat mechs. the Supernova has 26 DHS wich can only cool away 52 Points of heat, that means that a non-moving-Alpha raises the heat of that monstrosity to 20(just as a reminder: that reduces movement by 4(on a 3/5/3 mech), to-hit numbers are raised by 3 and a shutdown has to be avoided by a roll of 6+; additionally the Pilot suffers 1 injury(of 5 possible)forcing a conshiousness roll of 3+(at the first time...)).

I believe there are 3 interesting ideas for aircooled mechs:
-first Airflow-HS could be more effective than HS that have to function in vacuum as well, Like 3 Points of heat per DAHS(double aircooled heatsink) in vacuum those would only cool 1 heat.A supernova equipped with These could contonously Alpha without breaking a sweat.(26 times 3 is 78)DAHS would weigh 1 ton.

-second in very cold weather the Efficiency would further rise, by 1 Point per DAHS for every 10 degrees C below Zero, in Hot weather the effect would be negative , like -1 Point for every degree C above 30°C
defenders that live on a very cold planet might optimise their mechs to the conditions they would have to fight in. A supernova with 8 ERLL might be possible at -20°C

-Third it might be possible to have an increased cooling effect in dense athmosphere.

_________________
typos and spelling-mistakes are property of the finder. english is not my mother-tongue.


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PostPosted: Thu Aug 20, 2015 4:03 pm 
Offline
Supreme Mugwump
Supreme Mugwump

Joined: Wed Dec 06, 2006 3:42 pm
Posts: 3183
this mech useing Double Aircoolers is running cool at -40°C, following the abovementioned rules:
Code:
attleMech Technical Readout

Type/Model:    Supernova -40 
Tech:          Clan / 3058
Config:        Biped BattleMech
Rules:         Level 3, Standard design

Mass:          90 tons
Chassis:       Composite
Power Plant:   270 Fusion
Walking Speed: 32,4 km/h
Maximum Speed: 54,0 km/h
Jump Jets:     3 Standard Jump Jets
Jump Capacity: 90 meters
Armor Type:    Standard
Armament:      
  8 ER Large Lasers
Manufacturer:  (Unknown)
  Location:    (Unknown)
Communications System:  (Unknown)
Targeting & Tracking System:  (Unknown)

------------------------------------------------------------------------------
--------------------------------------------------------
Type/Model:    Supernova -40 
Mass:          90 tons
Construction Options:  Fractional Accounting

Equipment:                                 Crits    Mass
Int. Struct.:  138 pts Composite             0      4,50
Engine:        270 Fusion                    6     14,50
   Walking MP:   3
   Running MP:   5
   Jumping MP:   3
Heat Sinks:     15 DoubleAIRCoolers [105]      10      5,00
 (Heat Sink Loc: 2 LT, 1 RT, 1 LL, 1 RL)
Gyro:                                        4      3,00
Cockpit, Life Supt.:                         5      3,00
Actuators: L: Sh+UA+LA    R: Sh+UA+LA       14       ,00
Armor Factor:  240 pts Standard              0     15,00

                          Internal    Armor
                          Structure   Value
   Head:                      3          9      
   Center Torso:             29         35      
   Center Torso (Rear):                 12      
   L/R Side Torso:           19      25/25      
   L/R Side Torso (Rear):              8/8      
   L/R Arm:                  15      26/26      
   L/R Leg:                  19      33/33      

Weapons and Equipment    Loc  Heat  Ammo   Crits    Mass
--------------------------------------------------------
4 ER Large Lasers        RA     48           4     16,00
4 ER Large Lasers        LA     48           4     16,00
1 Targeting Computer     LT                  7      7,00
3 Standard Jump Jets:                        3      6,00
 (Jump Jet Loc: 1 LT, 1 RT, 1 CT)
--------------------------------------------------------
TOTALS:                         96          57     90,00
Crits & Tons Left:                          21       ,00

Calculated Factors:
Total Cost:        10.328.400 C-Bills
Battle Value 2:    4,085 (old BV = 4,070)
Cost per BV2:      2,528,37
Weapon Value:      7.697 / 7.697 (Ratio = 1,88 / 1,88)
Damage Factors:    SRDmg = 78;  MRDmg = 68;  LRDmg = 50
BattleForce2:      MP: 3J,  Armor/Structure: 6/7
                   Damage PB/M/L: 11/9/9,  Overheat: 0
                   Class: MA;  Point Value: 41
the BV is calculated with HMPro, useing 50 DHS to cool away the heat. of course the result would be overweight and overcrits... for Price-calculation i made a mech with just 15 DHS, then i combined the two with HMEditor. this Baby would be a nasty surprise.
Favorite tactic: slowly Walking back, leaving behind a freshly molten and refrozen Ice-surface that would let the followers slip.Preferably forming a line of about 15 of These.

_________________
typos and spelling-mistakes are property of the finder. english is not my mother-tongue.


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