2WD:
Shall constitute one rear drive axle with 2 wheels only.
4WD:
Shall constitute two drive axles; one rear drive axle with two wheels and one front steer drive axle with two wheels. On pulling vehicles the front and rear tires will be no more than 1 inch difference in diameter. On racing vehicles the front and rear tires will be the same size in diameter and width. 4WD vehicles will be true 4WD vehicles. The Big Rig class is the only class allowed to use tandem drive axles.
Battery:
Shall be NiCd or NiMh cells only. Factory built batteries will be encased in the original factory wrapper with the label attached. All other batteries must be in clear shrinkwrap or clear tape. No added opaque tape or shrink wrap allowed. Batteries will be readily available R/C type. Example of a non-usable battery is the military issue 3volt “C” size. Individual class limits will be listed in that class section of this rulebook.
Body:
Shall be the shell that gives the vehicle its shape and allows it to resemble a full size car, truck, or tractor.
Chassis:
Frame of the vehicle not including suspension, steering, body or gearbox.
Dual wheel:
More than one tire on one rim or a combination of more than 1 tire with one rim on each side of an axle. No dual wheels are permitted. Foam tires may be glued together to make 1 tire on 1 rim and shall not be considered dual wheels.
ESC:
Electronic Speed Control
Factory production:
Any R/C product manufactured by a recognized R/C supplier in quantities of no less than 100 units per year. Bodies are not required to be “factory production” as long as they are realistic. Please refer to motor rules for specifics on them. Factory production vehicle: Any factory production vehicle kit originally manufactured for use other than a pulling vehicle. For example a Tamyia Clodbuster or a HPI Wheelie King are “Factory Production Vehicle”.
Front axle:
The device mounted at the front of the vehicle in order to provide a means for steering. The axle will be mounted so that the wheels line up with the wheel openings in the body. Exceptions will be made for “Factory Production Vehicles”. The tires on hinged or floating front axles are not allowed to contact the track surface if the vehicles front end lifts ¾ of an inch or more.
Front wheel openings:
The open place that allows the front wheels to have clearance to move when turned to the right or left. The wheel openings will be located behind the front most part of the body. Front wheels are not allowed to extend more than one inch on either side of the body. Exceptions are made for 4WD vehicles, Factory Production Vehicles that must run the original suspension, and replicas of full size vehicles.
Gearbox:
The unit consisting of the gears, belts, chains, case and/or mounting brackets. The gearbox is the means for transmitting the power from the motor to the wheels. An additional gearbox refers to a second gearbox that is attached to the main gearbox.
Hitch:
The apparatus used to hook the pulling sled to the vehicle. The hitch shall incorporate a 5/16 inch hole for the sled hook and will be no more than ½ inch from the rearmost end of the hitch drawbar. The hole must be located behind the axle. The sled chain will have a clear path to the hole with no interference from the vehicle. The hitch is to be fashioned from a strong and rigid material. All hitches will be rigidly mounted. The hitch must be mounted in such a way to not allow any movement longitudinally, vertically, or horizontally. Adjustable hitches are permitted but must be locked in position when pulling. Unless otherwise noted in the class rule the maximum hitch height is 4”. The following will also apply to the 2” maximum hitch height classes. The hitch is measured by placing the vehicle on the tech table, without any downward pressure during inspection. Horizontal hitches will be measured to the top of the hitch. Vertical hitches will be measured to the top of the hole. Any hitch with multiple holes will have the holes above the maximum covered with tape.
Intentional jerking:
The act of deliberately manipulating the controls of the vehicle in a way to advance the sleds position in an erratic manner.
MSRP:
Manufacturers Suggested Retail Price. Maximum motor size: The total outside length and diameter of the motor not including the output shaft.
Measuring device:
All measurements are to be made with a normal ruler. Micrometers and the like are not to be used for tech.
Monster truck:
A vehicle with oversized tires designed to go over large obstacles at a fast pace. Original: As manufactured and unmodified. Production Pulling Vehicle: Any vehicle manufactured specifically for pulling. This may be “factory production” or scratch built.
R/C:
Radio controlled.
R/C Motor:
A motor that is designed and built for the R/C industry.
Readily available:
Available off the shelf from hobby shops, distributers, or from retail mail order outlets. Special order or custom made items are not considered to be “readily available”. Scale appearance: Having the scaled down look of a full size vehicle or part.
Sled:
The device used to create a drag on the pulling vehicle in which to stop the vehicle.
Stock:
Factory original for that vehicle or piece of equipment.
Traction compound:
Anything that is foreign to that tire. Any substance that was not made for, put on, or into the tire at time of manufacture. Tire glues are allowed to mount tires to rims or to glue two tires together in order to make a wider tire.
Tread width:
The width of the tread only. This does not include the sidewalls.
Tube chassis:
A chassis that is constructed of square, round, hollow or solid tubular stock. The chassis is the component in which the gearboxes, suspension, radio equipment, battery, body and all other vehicle components are attached.
Wheel:
An assembly consisting of one tire and one rim.
Wheelie bar:
A device mounted to the rear of the vehicle to prevent the vehicle from flipping over backwards once the vehicles front tires loose contact with the pulling surface. This device is made up of a single or pair of bars with one or two wheels mounted on the bars. Wheelie bars are permitted in all classes. They may not extend past the legal length of the vehicle and may not interfere with the operation of the pulling sled in any way. Skid plates are not permitted. In the dirt classes skid pads may replace the wheels on wheelie bars for scale appearance. Flexible straps for static grounding are only permitted to touch the pulling surface. Wheelie bars are not to be use to rock the vehicle back and forth. This would be considered intentional jerking.