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Lotus E21 – Innovative serrated bargeboards and middle zone updates before Melbourne


        Lotus literally works overtime to constantly improve performance and thus frequently presents new aero components on its cars . This time several middle zones updates followed the introduction of a modified front wing at last pre season test in Barcelona . The upgrade package included apart from innovative serrated bargeboards, a relocated closer to the car body sidepod panel ( yellow double-edged arrow shows the volume between the panel and the car body) and an additional element which leans outwards, inspired by Sauber’s former cars  .

Launch spec – the highlighted in yellow “π shaped” tab helps to drive air upwards and away from the car to seal as possible the underbody aerodynamics .

Launch spec – the highlighted in yellow “π shaped” tab helps to drive air upwards and away from the car to seal as possible the underbody aerodynamics .

   Barcelona Test on March – the yellow double edged arrow shows the volume between the panel and the car body which is now decreased compared to previous version , all changes are highlighted in orange color

Barcelona Test on March – the yellow double edged arrow shows the volume between the panel and the car body which is now decreased compared to previous version , all changes are highlighted in orange color

 

      The new philosophy is to speed up the air flowing through this zone, due to now less available volume,  while the serrated bargeboards bleeds portions of air to cut drag . The total volume of air may now be lesser but the increased speed counters this negative effect . The low height and leaning outwards extra vane helps to decrease further drag and provide a cleaner airflow towards the rear of the car . All changes aim to create more downforce especially when the cars changes directions .

       Serrated bargeboards may look brand new and innovative but spring their origins a decade back to Ferrari saw-tooth bargeboards .

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Lotus F1 Team – key people


 

Chairman: Gerard Lopez
Chief Executive Officer: Patrick Louis
Team Principal: Eric Boullier
Chief Operating Officer: Thomas Mayer

Technical Director: James Allison
Trackside Operations Director: Alan Permane
Chief Designer: Martin Tolliday
Head of Aerodynamics: Dirk De Beer
Team Manager: Paul Seaby

Chief Commercial Officer: Stephen Curnow
Head of Team Marketing and Communications: Stephane Samson
Head of Event Marketing: Frederic Garcia
Business Development Director: Federico Gastaldi

 

 

credit: Lotus F1 Team

Lotus E21 – Technical specifications


 

Chassis

Moulded carbon fibre and aluminium honeycomb composite monocoque, manufactured by Lotus F1 Team and designed for maximum strength with minimum weight. RS27-2012 V8 engine installed as a fully-stressed member.

Front Suspension

Carbon fibre top and bottom wishbones operate an inboard rocker via a pushrod system. This is connected to a torsion bar and damper units which are mounted inside the front of the monocoque. Aluminium uprights and OZ machined magnesium wheels.

Rear Suspension

Carbon fibre top and bottom wishbones with pull rod operated torsion springs and transverse-mounted damper units mounted in the top of the gearbox casing. Aluminium uprights and OZ machined magnesium wheels.

Transmission

Seven-speed semi-automatic titanium gearbox with reverse gear. “Quickshift” system in operation to maximise speed of gearshifts.

Fuel System

Kevlar-reinforced rubber fuel cell by ATL.

Cooling System

Separate oil and water radiators located in the car’s sidepods and cooled using airflow from the car’s forward motion.

Electrical

MES-Microsoft Standard Electronic Control Unit.

Braking System

Carbon discs and pads. Calipers by AP Racing. Master cylinders by AP racing and Brembo.

Cockpit

Removable driver’s seat made of anatomically formed carbon composite, with six-point or eight-point harness seat belt. Steering wheel integrates gear change, clutch paddles, and rear wing adjuster.

KERS

Motor generator unit driving into front of engine with batteries as an energy store. Motor Generator supplied by Renault Sport F1. Electronic control unit by Magneti-Marelli.

 

DIMENSIONS

Front Track: 1450 mm
Rear Track: 1400 mm
Overall Length: 5088 mm
Overall Height: 950 mm
Overall Width: 1800 mm
Overall Weight: 642kg, with driver, cameras and ballast

 

ENGINE

Designation: RS27 – 2013

Configuration: 2.4L V8
No. of Cylinders: 8
No. of Valves: 32
Displacement: 2400cc
Weight: 95kg
V Angle: 90°
RPM: 18,000
Fuel: Total
Oil: Total
Power Output: >750 bhp
Spark Plugs: Semi surface discharge
Ignition System: High energy inductive
Pistons: Aluminium alloy
Engine Block: Aluminium alloy
Crankshaft: Nitrided alloy steel with tungsten alloy counterweights
Connecting Rods: Titanium alloy
Throttle System: 8 butterflies

 

credit: Lotus F1 Team

Lotus E20 -Specifications


 

Chassis: Moulded carbon fibre and aluminium honeycomb composite monocoque, manufactured by Lotus F1 Team and designed for maximum strength with minimum weight. RS27-2012 V8 engine installed as a fully-stressed member.
Front Suspension: Carbon fibre top and bottom wishbones operate an inboard rocker via a pushrod system. This is connected to a torsion bar and damper units which are mounted inside the front of the monocoque. Aluminium uprights and OZ machined magnesium wheels.
Rear suspension: Carbon fibre top and bottom wishbones with pull rod operated torsion springs and transverse-mounted damper units mounted in the top of the gearbox casing. Aluminium uprights and OZ machined magnesium wheels.
Transmission: Seven-speed semi-automatic titanium gearbox with reverse gear. “Quickshift” system in operation to maximise speed of gearshifts.
Fuel system: Kevlar-reinforced rubber fuel cell by ATL.
Cooling system: Separate oil and water radiators located in the car’s sidepods and cooled using airflow from the car’s forward motion.
Electrical: MES-Microsoft Standard Electronic Control Unit. braKiNg system
Carbon discs and pads. Calipers by AP Racing. Master cylinders by AP racing and Brembo.
Cockpit: Removable driver’s seat made of anatomically formed carbon composite, with six-point or eight-point harness seat belt by OMP Racing. Steering wheel integrates gear change, clutch paddles, and rear wing adjuster.
KERS: Motor generator unit driving into front of engine with batteries as an energy store. Motor Generator supplied by Renault Sport F1. Electronic control unit by Magneti-Marelli.

Dimensions

Front track: 1450 mm
Rear track: 1400 mm
Overall Length: 5038 mm
Overall height: 950 mm
Overall width: 1800 mm
Overall weight: 640 kg, with driver, cameras and ballast

Engine

Designation: Renault RS27
Configuration: 2.4l v8
No of cylinders: 90° V8
No of valves: 32
Displacement: 2400 cc
Weight: 95kg
Rpm: 18,000
Fuel: TOTAL
Oil: TOTAL
Power output: approx. 750 bhp
Spark plugs: semi surface discharge
Ignition system: high energy inductive
Pistons: aluminium alloy
Engine block: aluminium alloy
Crankshaft: Nitrided alloy steel with tungsten alloy counterweights
Connecting rods: titanium alloy
Throttle system: 8 butterflies

 

 

source : F1Technical.net

Lotus Renault R31 – wheel force transducer

February 21, 2011 1 comment

 

Pirelli and Bridgestone tyres have significant differences in skeleton structure, so Pirelli tyres suffers  different shape deformations especially when cornering and decelerating  than Bridgestone  . Deformations may increase or even decrease tyre contact patch and even cause excessive ware . To understand this phenomenon and how tyre shape changes depending on longitudinal and lateral forces applied on the wheel-tyre combo, Lotus Renault during Jerez test used a wheel force transducer on both the rear and front wheels . Apart from the tyre dynamic evaluation , the wheel force transducer  can also provide help on perfecting the suspension settings especially when kerb riding.

That type of device is fitted  on modified rims and  provide data about range of forces suffered by the wheel at different rotation speeds  (r.p.m. ) . It is consisted of a magnesium rim , a sensor body of Titanium alloy and sensors and it is not the first time Renault uses such a device .

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