General Motors Whirlwind

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GM Whirlwind.jpg
Whirlwind Autocannon/5
Production Information
Manufacturer General Motors General Motors
Usage Field Gun BattleMech Mounted
Weapon Class Autocannon/5 Autocannon/5
Tech Base IS IS
Cost c-bills (unloaded) 125,000 125,000
Reload Cost c-bills 4,500 4,500
Introduced 2600's (TH) 2600's (TH)
Classic BattleTech RPG
Sub Name Towed GM AC-5 GM Whirlwind AC-5
Tech Base IS IS
Equipment Ratings /'-'-'/ C/C-C-D/D /'-'-'/ C/C-C-D/D
Technical Specifications
Damage Type B B
AP*Damage Dice
Damage *d6 10*20d6 *d6 10*20d6
Shots per Burst 3 3
Splash/Blast Yes Yes
Minimum Range 90 90
Short Range 180 180
Medium Range 840 840
Long Range 990 990
Extreme Range 1,350 1,350
Classic BattleTech
Damage 5 5
Minimum Range 3 3
Short Range 6 6
Medium Range 12 12
Long Range 18 18
General Information
# Crew/Slots crew 8 crew slots 4 crit slots
Encumbering Motorized Infantry
Shots per Reload 60 60
Shots per Burst 3 3
Bursts per Reload 20 20
Power per Shot
Power per Burst
Weapon and Ammo Mass
Mass (UnLoaded) in kg 8,000 8,000
Reload Mass in kg 1,000 1,000
Battle Value
BV (1.0) 70 70
Ammo BV (1.0) 9 9
BV (2.0) 70 70
Ammo BV (2.0) 9 9


Famously mounted on the General Motors Marauder BattleMech, this autocannon fires 120mm shells in three round bursts.[1]

=== Canon vs Not ===

The Fluff is rephrased Canon, but the RPG Stats are derivative using the Infantry Platoon Creation Rules for the Damage Stats, and doing a formulaic extrapolation from 180 meters at Short Range to the MechWarrior, Third Edition ranges incorporating the +1 modifier that a "Regular" MechWarrior Starts at in the RPG in addition to the +2 bonus that Combat Vehicles and BattleMechs get because they automatically carry the equivalent of an Advanced Fire Control system.


  1. The Price of Glory (PDF Edition), p. 8