Glossary · 12 terms

# Mobility terms

How a vehicle moves: power-to-weight, terrain resistance, traverse, top speed and the physics behind them.

[All](/glossary.md)[Vehicles](/glossary/category/vehicles.md)[Gunnery](/glossary/category/gunnery.md)[Armor](/glossary/category/armor.md)[Mobility](/glossary/category/mobility.md)[Vision](/glossary/category/vision.md)[Crew](/glossary/category/crew.md)[Progression](/glossary/category/progression.md)[Economy](/glossary/category/economy.md)[Ratings](/glossary/category/ratings.md)[Statistics](/glossary/category/statistics.md)[Battle modes](/glossary/category/modes.md)[Tactics](/glossary/category/tactics.md)[Slang](/glossary/category/slang.md)

[A](#a)BCD[E](#e)FG[H](#h)IJKLMNO[P](#p)Q[R](#r)S[T](#t)UV[W](#w)XYZ#

## A

[

AccelerationMobility

How quickly a vehicle reaches speed from a standstill, which matters far more in practice than its top speed.

](/glossary/acceleration.md)

## E

[

Effective speedMobility

The speed a vehicle can actually hold on a given ground type, rather than the cap printed on its specification sheet.

](/glossary/effective-speed.md)[

Effective traverseMobility

How fast a vehicle actually turns on a given ground type, once engine power, weight and terrain resistance are accounted for.

](/glossary/effective-traverse.md)[

Engine powerMobility

The engine's output in horsepower, which only means something next to the weight it has to move.

](/glossary/engine-power.md)

## H

[

Hull traverseMobility

How fast a vehicle turns on the spot, in degrees per second, which decides whether it can keep its front toward a faster opponent.

](/glossary/hull-traverse.md)

## P

[

Power-to-weightMobility

Engine horsepower divided by the vehicle's weight in tonnes, the single best predictor of acceleration.

](/glossary/power-to-weight.md)

## R

[

RammingMobility

Deliberately colliding with another vehicle, where damage scales with mass and closing speed and both sides take some.

](/glossary/ramming.md)[

Reverse speedMobility

How fast a vehicle can back up, which decides whether it can retreat into cover after firing.

](/glossary/reverse-speed.md)

## T

[

Terrain resistanceMobility

How much each ground type slows a vehicle down, quoted for hard, medium and soft terrain, where lower is better.

](/glossary/terrain-resistance.md)[

Top speedMobility

The highest speed a vehicle is allowed to reach, which it only attains with enough engine power and forgiving ground.

](/glossary/top-speed.md)[

Turret traverseMobility

How fast the turret rotates, in degrees per second, independent of the ground the vehicle is standing on.

](/glossary/turret-traverse.md)

## W

[

WeightMobility

The vehicle's mass in tonnes, which sets its power-to-weight ratio and decides who wins a collision.

](/glossary/weight.md)

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