Those teams will also be allowed unlimited out-of-season track testing, with no restrictions on the scale and speed of wind-tunnel testing.

BBC: F1 teams handed ?40m budget cap

The Fujita scale is used to estimate the wind speed of a tornado by the damage the tornado causes.

CNN: Tornadoes Fast Facts

Tornados are rated on several scales for strength based either on wind speed, pressure drop, or damaged caused, but the updated Enhanced Fujita Scale is the presently accepted scale in the United States.

FORBES: Tornados and Nukes -- How Big Can They Get?