Flywheels are typically made of steel and rotate on conventional bearings; these are generally limited to a revolution rate of a few thousand RPM. Some modern flywheels are made of carbon fiber materials and employ magnetic bearings, enabling them to revolve at speeds up to 60,000 RPM (1 kHz). Carbon-composite flywheel batteries have recently been manufactured and are proving to be viable in real-world tests on mainstream cars.
1925: The Tri-State Tornado. Indiana was one of three Midwest states in the path of the deadliest tornado in American history. On March 18, 1925, the Tri-State Tornado traveled a record 219 miles on the ground from Missouri through Illinois and into Indiana, where it struck Posey, Gibson and Pike counties.
Leo-Cedarville-area historical tornado activity is slightly below Indiana state average.V broadcast stations around Leo-Cedarville: 1  WANE-TV (Channel 15; FORT WAYNE, IN; Owner: INDIANA BROADCASTING, LLC). 2  WFFT-TV (Channel 55; FORT WAYNE, IN; Owner: QUOROM OF FT.