Trunion
Trunion is a Commerce Age Arsenal upgrade that increases artillery movement speed by 15%. It makes deployed guns easier to reposition as the front line moves.
Research profile
- Age
- Commerce Age
- Civilization
- Europeans; Federal Americans
- Research location
- Arsenal
- Research time
- 30 seconds
- Wood cost
- 400
- Coin cost
- 200
- Effect
- Artillery speed +15%
Effect
The benefit affects movement rather than artillery damage or firing range. Faster guns can follow an advance or withdraw from a threat with less delay, but still need protection while packing, deploying and moving.
Research condition
Available in the Commerce Age at Arsenal. Research time: 30 seconds. Cost: 400 wood, 200 coin. Civilization-specific building access can vary.
Research decision
Research when the army expects to move its artillery between positions or keep pace with a push. It has less value for guns that will remain behind a fixed defensive line.
Research access and artillery handling
Trunion is researched at the Arsenal after the Advanced Arsenal Home City Card has been sent. Its 200 Coin and 400 Wood cost and 30-second research time should be weighed against other Arsenal improvements. The 15% movement increase helps artillery reposition; it does not change its attack profile.
Unlocks and civilization exceptions
For European and Federal American civilizations, Trunion is a Commerce Age Arsenal technology unlocked after sending the Advanced Arsenal Home City Card; Sweden has it available by default. The Italian Milanese Arsenal route and the United States Springfield Armory route provide civilization-specific access. It costs 400 Wood and 200 Coin and takes 30 seconds to research.
Repositioning artillery
The 15% speed increase affects artillery movement. This is useful when a push must keep guns behind advancing infantry, when a Culverin needs to change firing lanes, or when artillery must withdraw from a threatened position. It does not increase attack, range, or firing speed, and it does not protect a gun while it is vulnerable during movement. Compare the mobility gain with other Arsenal research and the cost of replacing artillery.