Name:  Primitive Gyro
Type (Category):  Gyro (Core)
Reference:  Interstellar Operations: Alternate Eras (p. 116)

Description:
The gyroscope system of a BattleMech or IndustrialMech is one of the most critical components in the design of such units, on par with the engine systems and cockpit controls. Without this sophisticated equipment, ’Mechs would be far clumsier than today, scarcely able to maintain stability under even the simplest of actions, let alone the punishment of enemy weapons fire. The stabilizing influence of the gyro makes the BattleMech an effective war machine, and the IndustrialMech a versatile tool.

The standard ’Mech’s gyro today is a refined form of the types used in the early myomer-based IndustrialMechs of the mid-24th century. By the time of the Mackie’s development in 2439, gyro-stabilizers were a proven technology, only slightly bulkier than their modern counterparts.

Primitive gyros are identical in all ways to standard gyros (including costs), but compute their weight based on the Primitive ’Mech’s modified Engine Rating, rather than their actual, modern Engine Rating.

Game Rules:
The gyroscope is a ’Mech’s most sensitive piece of machinery. It keeps the ’Mech upright and able to move. The gyro can survive only one critical hit; the second destroys it.

After the first critical hit to the gyro, the controlling player must make a Piloting Skill Roll when the critical hit is applied, with a +3 modifier (in addition to any other standard modifiers); see Making Piloting/Driving Skill Rolls. In addition, the player must make a Piloting Skill Roll every time the damaged ’Mech runs or jumps, with a +3 modifier; the roll is made at the end of the ’Mech’s movement.

When a ’Mech’s gyro is destroyed (after a second critical hit), the ’Mech automatically falls and cannot stand up again; the controlling player makes an immediate Piloting Skill Roll, with a +6 modifier for the destroyed gyro (plus any modifiers for other damage), to avoid damaging the MechWarrior during the automatic fall.

’Mechs with a destroyed gyro may make weapon attacks per Firing When Down, and may change facing by one hexside per turn provided they have at least 1 MP available. A ’Mech with a destroyed gyro is not considered immobile.

BattleMechsIndustrialMechs

Prototype Date:	~2300
Production Date:	2350
Extinction Date:	2520
Recovery Date:	—

BattleMech Specific Construction Rules

WEAPONS AND EQUIPMENT COMBAT AND CONSTRUCTION TABLE ER = Engine Rating
IT = Item Tonnage (weight of component itself)

RULES LEVEL PROGRESSION TABLE
MegaMek Output → Critical Slot:  Gyro
Record Sheet Output → Critical Slot:  Primitive Gyro

Prototype Date:	~2300
Production Date:	2350
Extinction Date:	2520
Recovery Date:	—

IndustrialMech Specific Construction Rules

WEAPONS AND EQUIPMENT COMBAT AND CONSTRUCTION TABLE ER = Engine Rating
IT = Item Tonnage (weight of component itself)

RULES LEVEL PROGRESSION TABLE
MegaMek Output → Critical Slot:  Gyro
Record Sheet Output → Critical Slot:  Primitive Gyro