Formula Atlantic - Ralt RT-41
|ENGINE - 1.6 liter Toyota 4A-GE in-line, four cylinder, fuel injected, 16-valve, dual-overhead cam engine with 240 horsepower at 9500 rpm. A five-speed racing transmission completes the drivetrain package.|
Performance - Top speed is approximately 165 mph (265.5 km-h). Atlantic cars are capable of 0 to 60 mph (0 to 100 km-h) in a time of 2.8 seconds and 1 to 120 mph (1 to 190 km-h) in 11.4 seconds. Stops and corners at over 3 gs. At near its top speed, the Atlantic car makes more downforce than its own weight -- meaning it could run upside down on the ceiling.
CHASSIS - The Ralt RT-41 is a monocoque chassis of carbon fiber or other composite construction, similar to Formula One and Indy cars.
BODYWORK - Plastic composite bodywork, usually fiberglass or kevlar, featuring downforce generating sidepods similar to Indy cars, along with front and rear wings.
WHEELS - 13-inch diameter wheels of alloy construction, fitted front and rear.
TIRES - 13-inch low profile Hoosier racing tires.
BRAKES - Unrestricted, typically vented rotors with four piston alloy calipers. Typical braking capability from 80-0 MPH (130 to 0 km-h) in 90 feet (27 meters).
SUSPENSION - Fully independent suspension front and rear, typically "pushrod" type with the shock/spring units mounted inboard on the chassis.
DIMENSIONS - Overall width cannot exceed 78.75 inches (200 cm), wheelbase cannot exceed 106 inches (269.24 cm), maximum height is 39.1 inches (99.3 cm) excluding the safety rollover hoop; rear wing may be a maximum of 43.3 inches (110 cm) wide, and may not extend further than 31.5 inches (80 cm) behind the rear axle. Overall length cannot exceed 167.25 inches (425 cm).
WEIGHT - Minimum weight, including the driver, is 1,260 lbs.(571.5 kg) as qualified or raced.
A SHORT CLASS HISTORY - The Atlantic formula has existed in one form or another since 1966. It was born as the Sports Car Club of America's (SCCA) Formula B and was originally powered by a 1600cc two-valve per cylinder, twin-cam Lotus Ford engine. In 1974, a four-valve per cylinder engine, the Cosworth-Ford BDA, supplanted the Lotus-Ford, and the series was renamed Atlantic. An engine change came again in 1989 when industrial giant Toyota replaced the Cosworth with its 4A-GE 1.6 liter, 16-valve, twin-cam, four cylinder engine.
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