TECHNICAL SPECS
CHASSIS
- Steel tubular spaceframe with aluminium differential box and carbon-fibre cockpit
- Electro-actuated sequential manual transmission with flipper paddles on the steering wheel
- Number of gears 4
- 4 wheels Brembo steel brake discs, adjustable brakebalance
- Unequal double wishbone suspension with push-rod, adjustable dampers and ARBs
- Custom magnesium wheels, 13”x6”, 29 mm offset (Fr) / 13”x7”, 41,7 mm offset (Rr)
- Tyres 152x62 R13 R25B Hoosier (Fr) / 178x48 R13 R25B Hoosier (Rr)
- Overall length 2795 mm
- Overall width 1468 mm
- Height 1005 mm
- Whellbase 1550 mm
- Front track 1200 mm
- Rear track 1190 mm
- Weight (with water and lubrificant) 230 kg
ENGINE
- Type Honda CBR 600 RR 2005
- Number of cylinders 4
- Total displacement 599 cm3 (with a 20 mm intake restriction, as Formula SAE rules)
- Magneti Marelli electronic injection
- Chain drive with Quaife differential
- Max power 92 Hp @ 11750 rpm
- Max torque 68 Nm @ 7500 rpm
DESCRIPTION
The Engine
The engine is often said to be the heart of a car, especially in a racing prototype. Like the previous SC cars, SC09 uses the Honda PC37E engine, a 599cm3 straight-4 engine from CBR600RR production bike, tuned by the Engine Division to make it complying to Formula SAE rules.
That rules impose a 20mm intake restriction; for this reason the intake system must be entirely designed and manufactured by the team members. It is a variable length system and it represents the main difference between the SC08's engine and the new car's one; this solution guarantees a better driveability, optimizing the volumetric efficiency from 6000 to 13000 revs/min.
The engine utilizes a dry-sump lubrication system because it prevents oil-starvation at high G loads and because it lowers CoG positively affecting performance.
Engine division's members also completely re-designed the cooling, the fuel and the exhaust systems in order to improve weight, performance and reliability.
Last but not the least, the engine head modifications. Intake and exhaust runners have been completely smoothed to let gases flow better; OEM pistons have been replaced with racing ones and the camshaft timing has been accurately regulated.
Titanium alloy connecting rods and new camshafts are part of the last evolution step
The Wheels
In a racing competition even wheels could make the difference, especially when you are fighting for first positions.
For this reason alloy wheels are often employed in place of normal steel ones, because of their lighter weight, which improves the steering and the speed of the car.
This type of wheels are made from an alloy of aluminium or magnesium metals or sometimes a mixture of both, but magnesium alloy wheels, or "mag-wheels", offer considerable better performance.
The SC09, like the previous year car, uses two 13”x6” (Fr) and two 13”x7” (Rr) custom magnesium wheels produced by Marvic by sand gravity casting, a process associated to the production of prototypes.
After the casting phase each wheel is refinished, grinded and lapped, and before being machined by CNC machines, each wheel undergoes a thermal treatment in order to increase its mechanical properties
Control Systems & Telemetry
Over the last years, electronic systems have been major contributors to the success and popularity of all types of motor racing, from MotoGP to Formula One or WRC.
From pre-race testing to post-race, a motor sport team collects and analizes data to refine designs and increase performance, by means of embedded processors that gather and exchange information to control, optimize, and monitor all of the car functions.
In modern motor racing this type of measurement and reporting of information are obtained by a wireless data transfer technology, named telemetry.
For the first time in SquadraCorse's history, also a SC'car has the use of a telemetry system, totally conceived and made by the team's control division.
The electronic system is composed by seven units distribuited in the car and connected with 1Mbit/s CAN bus, subdivided in:
- ECU (Engine Control Unit) Magneti Marelli SRA-EDL8
- Dashboard integrated in the steering wheel, which shows to the driver all the information by a LCD display
- Data Acquisition Unit (DAU), that acquires the values of analogic sensors, sending them on CAN bus
- Datalogger, that receives all informations from CAN bus and it transmits them on ethernet by UDP protocol. Moreover datalogger stores data in a sd card
- Pneumatic Actuation Unit (PAU): the pneumatic shifter and the variable geometry air box need an indipendent control unit that is connected to electrovalves
- Bridge Wi-Fi: the two ECU and datalogger ethernet lines are connected to this unit to obtain a Wi-Fi telemetry system
- Inertial Misurement Unit (IMU)
The telemetry software stores all information and shows data to technicians; this application is written in Java and it is divided in two part, one for visualization and the second one for storage, both optimized for receive and manage all data in the network.
The visualization system can represent one signal at 2KHz on a normal laptop without any real-time operating system.
Storage system is completely divided from visualization system for not overload PCs during operations and increase performace. Control Division's engineers use a MySQL database engine for elaborate data captured on the network and store information on disk using high performace of databases.
Information stored with database are after exported in MatLab format for post-elaborations like filtering, frequency analysis and other tasks for realize dynamic model of the SC09
