HTC - Technical Regulations

Technical Regulations.

All vehicles participating in the "Hard Truck Contest" competitions must meet the following requirements:

1. Models of the freight trucks build with LEGO are participating.
1.1 Models of the real trucks as long as verisimilar models of own design are allowed to compete. Various futuristic vehicles are not allowed.
1.2. Models made in "Technic" style (i.e. hollow frame solutions) are prohibited, since such imitation can not result in scaled model of the prototype, and the model will be much lighter than the rest of competitors. It is assumed that the "System" body will be built on "technic" base, however wide usage of other elements (Technic beams) is allowed, the main object is the absence of unnecessary holes in the body.

2. The scale of the trucks is 1 to 22. In this scale:
2.1. The main width is 14 studs (this corresponds to the maximum width of the truck 2500 mm). It is measured on the front bumper, fenders, wheels, fuel tanks (side fairing).
2.2. The deviation of + / -0.5 stud is acceptable, as well as small protruding elements (ring wings, wheels, mirrors, pipes).
2.3. The external diameter of the wheels must be 43.2 mm (a list of suitable wheel is stated in Annex 3).

3. Number of axles, including steering and drive is not regulated.

4. LEGO Power Functions (PF) system is used to drive the truck.
4.1. Traction motor - 1 XL motor of Power Functions system.
4.2. The main transmission gear ratio is fixed - drive-up 3:5. That is, every 3 turnovers the XL motor shaft accounts for 5 turnovers of the driving wheels.
4.3. The steering system may contain any number of any LEGO motors. We recommend using one the M motor as the most accessible and directly compatible with the PF.
4.4. You can use custom design remote transmitters compatible with the PF protocol.
4.5. Participant must use only one channel (assigned at the draw). Unauthorized switching to other channels, as well as obstruction to other users is prohibited.
4.6. Only one standard battery pack with six AA elements (batteries or rechargeable batteries) is allowed, the total voltage of no more than 9V.
4.7. All electrical items must be mounted on the truck and to be hidden or incorporated in the design of the model.

5. The coupling mechanism of the truck must have the characteristics specified in Annex 4 to be compatible with trailers.

6. The following modified and non-Lego components are allowed, as long as that they do not affect the running characteristics and are not dangerous to the other competitors:
6.1. Flat stickers. Must not be structural element design (stick together the different parts) and occupy more than 50% of the surface of the model.
1.2. Painted elements. Coverage should not be "glue" parts, painted structures should remain dismountable. Painted elements may occupy no more than 20% of the surface of the model.
1.3. Rubber rings, tubes. Should not be the structural element.
1.4. Cords, ropes, wires. Should not be the structural element.
1.5. Lamps, LEDs, sound devices. If used should be completely covered with LEGO elements.
1.6. Small (no more than 2x2x2 studs) decorate elements: icons, manufacturer logos, figures on the hood. No more than 6 pieces per model.
Note 1: Using of any non-standard parts in the drive-wheel is prohibited
Note 2: The participant must notify the organizers if any non-standard parts are used no later than three days prior to the race round. The notification should be accompanied by high quality photos of all parts of the model to be studied by the commission of judges. In case of missing notification the organizers reserve the right to disqualify the model in accordance with violation of the requirements set forth