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Lotus Seven
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===Handling=== The highest part of the car is about three feet (900 mm) from the road and it has a cloth top and side curtains with plastic back and side windows. The supports for the top and the windshield frame are aluminium. The lower chassis tubes are five inches (127 mm) from the road, while the wet-sump, bell housing, and one chassis tube are lower, meaning the centre of gravity is very low. The front/rear weight distribution is nearly equal and the lack of a boot and small petrol tank assure that it remains fairly constant. It is, however, more front-heavy than more modern high-performance cars. ====Suspension==== In the original Seven, the front lower [[A-arm]] (or "wishbone") of the [[double wishbone]] [[Suspension (vehicle)|suspension]] is traditional, but for the purpose of reducing weight, the upper suspension integrated an anti-roll (anti-sway) bar into a horizontal suspension arm. This approach formed a pseudo-wishbone which was semi-independent in nature. This approach worked well with early cross-ply tyres, but with later radials, the configuration seriously affected its adjustability.{{Citation needed|date=February 2007}} For the rear suspension, Lotus originally used a [[live axle]] (or [[solid axle]]). This approach was very cost-effective since most production saloon cars up to the 1980s used these components. A mixture of Ford, [[Standard-Triumph|Standard Motor Company]]<ref> Lotus Seven Owner's manual</ref> and Austin components was used. One disadvantage of live axles is higher [[unsprung weight]], affecting handling and ride on rough surfaces. ====Aerodynamics==== In general, cars with non-optimised [[aerodynamic]]s tend to be free of adverse aerodynamic effects on handling, but the front wheel arches, of all but the Series I, cause lift at high speeds. Like the good straight-line performance, the car's nimble handling is limited in the speed range, and this is not usually important in a car intended for public roads. While the car's frontal area is small, the Lotus Seven has a [[drag coefficient]] (<math>\scriptstyle C_\mathrm d\,</math>) among the highest of any known production car - ranging from 0.65 to 0.75, depending on the bodywork.{{citation needed|date=February 2017}} Additionally, the clamshell front [[Fender (vehicle)|wings]] develop lift. This is accentuated by the slight natural lift caused by rotating wheels. Consequently, Sevens have exhibited understeer at high speeds. ====Steering==== The rack and pinion steering provide a minimum of play and friction.
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