Kerub

Kerub

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Kerub is the seventh car of the E-Team. Its project won Class 3 competition of Formula SAE Italy 2015 in Varano de’ Melegari. It was assembled during the season 2016.

Kerub took part in the Formula SAE Italian Event (22-25 July 2016) (Results).

Specifications

Model

Name: Kerub
Year: 2015-2016
Colours: Black and Orange

Dimensions

Length: 3050 mm
Width: 1400 mm
Height: 1180 mm
Mass: 240 kg
Wheelbase: 1580 mm
Front track: 1210 mm
Rear track: 1110 mm

Suspensions and tires

Suspension type: Double unequal length A-Arm. Push rod actuated, laterally oriented spring-dampers; adjustable anti-roll bar
Tires: Hoosier 20.5×7-13
Rims: 7” channel, Al-Mg cast rims
Hubs and uprights: Self made, Al 7075 CNC-machined
Spring dampers: Öhlins TTX 25 FSAE, 6 spring series
Anti-roll bars: 6 settings, froAnt (errore anche su ET6) and rear
Steering system: Pinion-rack system, bevel gear box

Brake system

Rotors: Cast Iron, hub mounted, floating 220mm diameter on the front, fixed 210mm diameter on the rear
Master Cylinder: AP Racing CP 7854 15,8 mm bore / 23.8 mm bore rear with adjustable bias
Calipers: 24 mm dia., Quad piston, radial mount (front). 24 mm dia., double opposing piston, radial mount (rear)

Frame

Frame construction: Tubular space frame
Material: AISI 4130 steel round tubing, 1.125” dia / 1” dia / 5/8” dia, various thickness
Joining method and material: TIG welding

Bodywork

Body: 8 components made of Carbon/Epoxy, Flat Undertray with rear diffusers
Wings: front and rear double slot wing, variable configuration for upper rear wing airfoils
Cl = 2.2
Cd = 1.1
Downforce (@ 80 km/h) = 690 N

Engine

Model: Honda CBR 600 RR
Bore: 67 mm
Stroke: 42.5 mm
Cylinders: 4
Displacement: 599cc
Lubrication: original oil carter with volume reduced by 50%, separate cooling radiator
Compression ratio: 12:1
Throttle Body / Mechanism: AT Power 28mm, double return spring, idle engine regulation
Intake System: 2.2 liter nylon-aluminum plenum, addictive manufacturing, selective laser molding technology
Fuel Type: 98 Octane, Gasoline
Fuel System: 4 Honda injectors mounted on the intake
Cooling system: Radiator with thermostatic electric fan, optimized duct
Exhaust System: 4-2-1 exhaust system, ceramic coating, aluminum GPR albus Ceramic muffler

Electronics

ECU (Engine Control Unit): Life Racing F88 with lambda sensors and launch control, gear and clutch management, internal DLS (Data-logging System), accelerometers, GPS, phonic wheels, steering angle sensor
Student build board A2CAN and steering wheel based on ATMEL microprocessor
Hall-effect sensors on PDU (Power Distribution Unit) to measure currents

Drivetrain

Clutch: Proportional direct-action clutch control, pneumatically-actuated
Gearshift: 6-speed semiautomatic sequential gear control, pneumatically-actuated
Differential: Drexler, limited slip clutch pack
Final ratio: Adjustable 3.46-3.61-3,69