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Design Overview
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                 BattleMech Technical Readout

Name/Model:         Sentinel STN-3L
Designer:           Catalyst Game Labs
Source(s):          Record Sheets: 3050
                    Record Sheets: 3050 Upgrade
                    Record Sheets: 3050 Upgrades Unabridged, Clan & Star League
                    Record Sheets: Succession Wars
                    Technical Readout: 2750
                    Technical Readout: 3050 Upgrade
                    Technical Readout: Succession Wars
Technology:         Inner Sphere
Technology Rating:  E
Tonnage:            40
Configuration:      Biped BattleMech
Era/Year:           Star League / 2652
Rules (Current):    Tournament Legal
Rules (Era):        Tournament Legal
Rules (Year):       Tournament Legal
Total Cost:         3,203,830 C-Bills
Battle Value:       717

Chassis:              Defiant V 
Power Plant:          Pitban 240 
Walking Speed:        64.8 kph  
Maximum Speed:        97.2 kph  
Jump Jets:            None
    Jump Capacity:    None
Armor:                Valiant Lamellor
    1 KWI Ultra AC/5
    1 Defiance Streak SRM 2
    1 Defiance B1A Small Laser
Manufacturer:         Defiance Industries
    Primary Factory:  Hesperus II
Communications:       StarLink/Benicia Model AS829G
Targeting & Tracking: Targa-7, Vid-Com-17

    The STN-3L Sentinel is a medium BattleMech, though its 40-ton mass puts it at the low end of
    its class. Designed to provide battalion-level BattleMech support for infantry and
    light-armor units, the 'Mech has good maneuverability, long-range hitting power, and an
    advanced communications system. Equipped with the powerful VidCom-17 and Targa-7 long-range
    targeting and tracking system, the Sentinel is ideal for use in patrols or as a mobile
    observation post. The 'Mech also carries a StarLink/Benicia Model AS829G communications
    system. Capable of simultaneous operation on multiple frequencies, this system not only
    allows the Sentinel to monitor closely and to command units operating under it, but also
    keeps the 'Mech in close contact with rear-area artillery units, calling for fire when
    Defiance Industries first produced the Sentinel in 2651 for use by House Steiner's
    private army. The 'Mech appeared one year after the Star League Council had passed an
    amendment allowing the Council Lords to double their personal household forces. Originally
    intended for infantry support, the 'Mech soon moved on to the role of guarding military
    installations and major land holdings of the Steiner family. By the early 28th Century, the
    design was also in use by the Star League Defense Forces as well as the Davion and Marik
    private armies.

    The STN-3L's 40-ton frame is powered by the 11.5 ton, Pitban 240 fusion engine, giving the
    'Mech a walking speed of 65.4 kph and a top running speed of 97.1 kph. Shortly after the
    'Mech's original deployment, concern arose over the choice of the Pitban 240 because of
    rumors about shielding problems with the Pitban 240s that Defiance Industries was producing
    under license. After a number of Sentinels were pulled from the field because of chronic
    over-heating, an investigation took place. This investigation found that the heat
    circulation system was at fault, rather than the engine shielding. The faulty components
    were replaced in most existing 'Mechs and all later production versions.
    The Sentinel is well-equipped for combat, carrying a single KWI-5 Ultra Autocannon, a
    single Defiance Streak-2 SRM Launcher, and a single Defiance B-1A Small Laser. Kawabata
    Weapons Inc. produced the AC/5 Ultra especially for Defiance Industries. The weapon gives
    the 'Mech good long-range fire capability, with an effective range exceeding that of LRMs
    and standard AC/5s. Another special feature of this weapon is its ability to fire rounds at
    double the rate of a standard AC/5. Though this autocannon fire is not as accurate as would
    be a pair of standard AC/5s, the Ultra does give an equivalent volume of fire.
    Unfortunately, besides generating much heat and burning through ammunition supplies
    quickly, the extremely high rate of fire has caused some other major problems, particularly
    on the early STN-3Ls. When fired at its maximum rate, the weapon vibrates violently, causing
    the internal circuitry in the BattleMech's weapon arm to fail. This often causes a total
    loss of control of the arm, effectively rendering the AC/5 useless and cutting the
    Sentinel's combat capabilities almost in half. Though repairs for this problem are simple,
    the problem keeps the 'Mech out of combat for half an hour or more during repairs.
    The current STN-3L has been modified to reduce the chance of disturbances to circuitry.
    Even these modifications have not solved the problem totally, with an estimated 3 percent
    chance that the problem will occur whenever the AC/5 Ultra fires at its maximum rate.
    The Sentinel was not designed to engage in close combat, relying instead on its AC/5
    Ultra to hold off enemy units at long range, but it can defend itself if an enemy gets
    close. Tucked away inside the Sentinel's right torso is its Defiance Streak-2 SRM Launcher,
    linked to a Targa-7 fire control system. This short-range missile system is designed to
    guarantee a hit against any target onto which the pilot can get a lock. A special feature of
    this system prevents the weapon from firing at a target when there is no lock-on. This saves
    ammunition by preventing shots that would miss anyway. Unlike a standard SRM, whose shotgun
    effect may result in some misses and some hits, the Streak SRM hits with all its missiles.
    This gives the unit the ef

Equipment                                                             Mass                      
Internal Structure:                          Standard                  4.00                     
Engine:                                     240 Fusion                11.50                     
    Walking MP:                                 6                                               
    Running MP:                                 9                                               
    Jumping MP:                                 0                                               
Heat Sinks (Single):                            10                     0.00                     
Gyro:                                        Standard                  3.00                     
Cockpit:                                     Standard                  3.00                     
Armor Factor:                                   88                     5.50                     
    Type:                                    Standard                                           

                                    Internal         Armor     
                                    Structure        Value     
    Head:                               3              9       
    Center Torso:                      12             10       
    Center Torso (rear):                               7       
    R/L Torso:                         10              8       
    R/L Torso (rear):                                  5       
    R/L Arm:                            6              8       
    R/L Leg:                           10             10       

Weapons and Ammo                                       Location          Critical     Tonnage   
Small Laser                                               RT                1          0.50             
Streak SRM 2                                              RT                1          1.50             
Streak SRM 2 (Ammo 50)                                    RT                1          1.00             
Ultra AC/5 (Ammo 20)                                      LT                1          1.00             
Ultra AC/5                                                LA                5          9.00             

Alpha Strike Statistics                                             
Point Value (PV): 23
TP: BM,  SZ: 2,  TMM: 2,  MV: 12"
Damage: (S) 2 / (M) 2 / (L) 1,  OV: 0
Armor (A): 3,  Structure (S): 3