I'm Andrei Basov, captain of Bauman Technical University racing team in Formula Student series
I'm gonna tel you about our third racing car BRT3
Formula Student is an international engineering competition
It's started in 1978 in USA and now competition is held around the world
We competed on this car in Germany, Austria and Russia
We had good results in Europe this year
And took first place in Russia
At the moment we are the best Russian team in Formula Student
Now about Formula Student...
At first Formula Student is engineering competitions, it's not motorsport
We have some technical regulations
Teams build cars according technical regulations
Apart from the racing, car design is evaluated. Also evaluated the selection of engineering solutions, etc.
There are several basic requirements for the design of the car.
Must be a four-stroke internal combustion engine.
Cubic capacity not more than 610cc.
Supercharging is allowed, but only if we develop it ourselves.
Air Input restricted to 20 mm, this is designed to limit the power and equalize contestants.
Also we have safety requirements - safety arch, tube frame thickness, etc
Vehicle must be equipped with a suspension that have 50 mm stroke.
We can not just build a big go-kart.
And there are lots of less important requirements.
Now specifically about this car.
The first thing that distinguishes our car from all the other Russian teams, this is what we have the front and rear wing.
The rear wing at a speed of 100 km \ h produces about 120 kg of downforce.
This is important in high-speed cornering.
In general, we have the concept of lightweight but powerful car.
For those technical solutions that are applied, this car is quite a light.
The carrier system is a space frame, but it is not entirely steel, we use carbon fiber tubes.
Composite materials are widely used in the design of the car.
The nose fairing, wings, suspension arms, frame and many other parts are made of carbon fiber
In particular, the steering rack housing is our own production, it is made by winding carbon fiber.
The seat follows the shape of the pilot.
We made a cast of the pilot in the foam. Then we used a 3D scanner, and then milled matrix.
So seat is ideal for pilot.
In our car we use a sequential gearbox.
When shifting the pilot does not use the clutch.
Gears are shifted using the levers on the steering wheel.
They are located on the top.
Lower levers for the clutch, like on F1.
The quick steering wheel with integrated connectors.
The instrument panel is activated during installation of the steering wheel.
The steering wheel also has auxiliary buttons.
The dashboard is self-developed, it displays the data of the car.
Suspension.
In this car, as well as many open-wheel car, the suspension is double wishbone.
Shocks placed on the frame.
They are connected through the rod and swing.
Front suspension type pool-rod, rear suspension type push-rod.
We use bicycle shock absorbers for mountain bikes.
Cane Creek shock absorbers with air spring.
The air spring is lightweight and allows to adjust the spring stiffness simply by changing the pressure.
Now, about the engine.
This is a very interesting part of that car.
Since the first car BRT-1, which we built in 2013, all the cars are supercharged.
Compressor operating from the crankshaft via the belt drive.
You can see the compressor on the back of the car.
Air inlet restricted to 20 mm
At the outlet of the compressor is installed complicated part.
This cast of our own design.
We printed a model using 3D printer Picaso.
This is our sponsor, they are helping us.
Blowoff valve which releases the charge air during the rapid closing of the throttle, it protects the system from destruction.
Electronic throttle, allows to customize the accelerator card.
This is a handy thing.
Intercooler is used because the air after the compressor can be heated to hundreds of degrees.
At the outlet of the intercooler it has 35-40 degrees.
The engine is also equipped with a lubrication system with dry sump.
We provide a reliable supply of oil to the engine and low center of gravity. 60 mm lower than with a wet-sump.
Final drive - Chain drive.
Limited slip differential is used with a variable locking ratio. And separately for acceleration and braking.
The engine management system - MOTEC M400.
Engine heavily modified. So we had to make new maps ignition fuel.
In general, all parameters are changed.
Adjust engine helps us company Uspenskiy Rally Tecnica.
These are our sponsors. With their help we were able to do a good tune the engine
and in the third season get really good results - won first place in the Russian stage.
We use aluminium wheels BRAID. Weigh 2.2 kg.
Tire provides our sponsor Michelin. Racing slick tires with soft race compound.
All the unsprung mass of our own design, too.
The front hub, brake disc, suspension arms - all of our own production.
This suspension arms made by winding carbon fiber.
Car Specifications:
Weight 247 kg
acceleration 0-100 - 3.81 seconds
the power of 93 hp torque of 65 Newton meters - this is due to 20mm restrictor reducing the power output.
Maximum speed - 140 km \ h.
The high speed of this car is not necessary because all of our race tracks quite tortuous and short.