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Technical specifications

1) General conditions

  • a) The object is the design and construction of a „pneumatic vehicle” – PNEUMOBIL – which is driven by compressed air. The transmission of torque onto the wheels shall be performed by pneumatic control and drive elements.

2) Composition

  • a) The driver has to sit on the vehicle (remote control is not permitted)
  • b) Number of wheels: minimum 3, - arranged at least in 2 wheel-tracks, for safety reasons

3) Mass and dimensions

  • a) No limit to the mass is defined
  • b) Dimensions: optional, without limitation (the transportability to be taken into consideration)

4) Framework, car-body

  • a) The chassis shall be made of metal, carrying the pressure-bottle, the driving system and the driven wheels.
  • b) The pressure (air) bottle and the pressure-reducer must be protected by the framework of vehicle.
  • c) Material and design of other components are not limited.
  • d) Closed chassis is not required, but the driver must be separated from moving parts of drive system by a protection shield

5) Engine

  • a) The conversion of energy of compressed air to mechanical energy should be performed by pneumatic cylinders and valves of firm Rexroth.
  • b) Number of applicable cylinders: maximum 4 ( with max. diameter Ø100 mm, and standard strokes according to the catalogue).
  • c) The available pneumatic components for engine construction can be found on thehome page of competition.
  • d) The racer teams, participated in the competition in 2008 are asked to use the existing pneumatic parts for construction of vehicles, and give in only the missing, or additional parts, as required for the assembly.
  • e) The control system can be electro pneumatic as well, but the source of energy (battery) and PLC should be supplied by the competing team.
    Promoted voltage: 24V DC
  • f) Only one engine can be used in the vehicle, which makes up one mechanical unit. Every cylinder of engine shall be in moving, in every run (category) of competition.
  • g) The engine must be visible by the jury, or transparent cover can be used.

6) Drive chain

  • a) The drive chain can be optionally built with geared, or direct transmission.
  • b) The application of free-wheel is mandatory, clutch is permitted.
  • c) The drive chain shall permit to move the vehicle by hand force. (forwards and backwards)

7) Suspension

  • a) Any kind of wheel suspension principle is applicable.
  • b) The diameter of wheels is optional.
  • c) The pavement of runway is bitumen.

8) Steering-gear

  • a) The vehicle can be equipped with any steering gear.
  • b) The vehicle must be easily steered, the driver must be able to drive easily straight and take a bend, by normal force.
  • c) The vehicle should be able to turn around on the 8 m wide speedway.

9) Brake

  • a) The vehicle shall be equipped with two independent brakes, capable for efficient reduction of velocity of vehicle, and to stop the vehicle.
  • b) One of the brakes shall be able to fix the vehicle in standing position.

10) Compressed air bottle:

  • a) The source of energy is a 10 litre pressure-bottle filled with air, nominal pressure of 200 bar. The air bottle is equipped with a pressure-reducer.
  • b) The bottle shall be fixed to the chassis, and locked against slipping. The pressure-reducer shall be protected against damage, in case of collision, accident or external objects (e.g. with protection cover)
  • c) Technical data of pressure-bottle:
    • 1) Dimensions: The exact properties will be later before the nomination given!
    • 2) Type of pressure-reducer: Messer FC-2000
    • 3) Connection of pressure-reducer: Plastic pipe: Ø 10 mm
    • 4) Maximal air flow of reducer: see on the data sheet of Messer (download)
  • d) During the competition only pressed air can be used for driving the vehicle. Optional electric battery for the control system is permitted.

11) Safety prescriptions

  • a) The driver must have a safe place in the vehicle.
  • b) The fitting and use of minimum two-point safety belt is obligatory. (crossways on burst)
  • c) An emergency stop circle shall be used in the pneumatic system, for exhausting the air from drive chain. The operating lever or button shall be easily accessible by the driver or by other helping person. The circuit diagrams of compulsory emergency stop system are available on the home page of „Pneumobil”. Only the specified circles and pneumatic elements can be used for this purpose.
  • d) The optional source of current (battery) shall be safely fixed, and the vehicle equipped with a main switch which should be easily accessible, similar to the emergency stop lever.
  • e) Wearing crash-helmet by the drivers and the passengers (if any) is compulsory during the events of competition.

12) Pneumatic elements

  • a) The conversion of energy of compressed air to mechanical energy should be performed by pneumatic cylinders and control valves of firm Rexroth.
  • b) The applicable Rexroth pneumatic components can be selected from the list on the home page of the competition.
  • c) Besides the driving system the vehicle can have other pneumatically operated functions as well.

13) Documentation

  • a) The compeeting teams have to prepare the kinetic calculation, the sketch-plan and the pneumatic plan of the designed vehicle with a list of needed pneumatic elements.
    The vehicles shall be presented in the documentation in details, according to the paragraphs of technical conditions.
    Term of submitting of documentation: 15.12.2008.
  • b) Photos of the ready vehicles equipped with the safety appliances, certifying the compliance with the technical and safety requirements shall be submitted.
    The incoming photos will be treated with absolute secrecy by Rexroth until the day of competition.
    Term of sending in the photos: 31.03.2009.
    Aim of this: discovery of occasional shortcomings of safety before the competition.
  • c) Accepted languages of documentation: Hungarian or English

14) Start plates and publicity surfaces

  • a) Two separated even surface with size of A3 shall be provided on the front and back, or on the right and left side of the vehicle for the start plates. These surfaces can be directly on the chassis or on extra boards made for this purpose.
    Without these surfaces the vehicle cannot be approved for the competition.
  • b) Sponsor advertisements can be also placed on the vehicle, in a maximum size of A4 and max. two copies of each advertisement.
  • c) The members of competitor teams shall wear the „T” shirts of Rexroth, what will be received in different colours by the team leaders, one months before the competition.
    The logo of sponsors can be placed on the „T” shirt.
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