HO
Racing Association –
2006 Technical Rules
(Effective
The purpose of the organization and
rules are to lay a level playing field for racing the Aurora Model Motoring
Thunderjet 500 slot cars from the 1960’s featuring the “pancake” style
armature.
Car specifications
Cars:
Chassis: All original stock T-jet parts of the copper
chassis, in the original configuration, must be used. Gear plates may be trimmed to allow lowering
of bodies to enhance scale appearance of the car. No silver parts or soldering of electrical
connections. No other modification to
the chassis of any kind is allowed.
Bodies: Shall be appropriate for the class raced and
may be lowered. Wheel wells may be
trimmed for tire clearance but must maintain scale appearance and
proportions. Must be mounted by two
screw posts and all cars must have windshields front and back, unless the
original body did not have rear glass (eg:
T-Jet Porsche 904). Custom cars must
have the look and feel of cars that might have raced in their classes. Custom bodies must maintain a consistent
thickness, similar to original T-Jets and may be made from any cast type
material. Various other manufactured
bodies from similar size cars are allowed (Atlas, Lionel, Bachmann, Faller,
etc.) as well as modern (JL, Model Motoring, MEV, RRR, etc.).
Wheels: Must be press on plastic, originals or
after-market. Small tire class wheel
width must not be more than 110% of stock T-Jet wheel width not including
flange. Small tire class wheel and tire
combination may not be larger in diameter than stock T-Jet wheel and tire
combination. Wheels may be trued and
shoulders narrowed for better tire adhesion.
Flanged wheels are allowed.
Outside flanges of wheels are not included in axle, wheel and tire
combination width measurements.
Tires: May be stock original or dimensionally
similar black silicone replacements and may be glued on. Tire/axle width cannot exceed 1” for closed
wheel and 1 ¼” for open wheel.
Technical Specifications
All technical
inspections/measurements are to be done by the Technical Director if
possible. If not, the race host or race
director will tech entered cars.
Dyno test: Maximum voltage during four-second test must
be 1.00 volt or less for small tires and 1.20 volts or less for large tires
respectively. Cars will be tested before
the race and, at the discretion of the Technical Director, may be tested after
the race.
Magnet test: Each car shall be placed over the gauge
(which lays lengthwise and is covered by both magnets of the car), and then
lifted from the bench/table. The Test
Gauge must not be lifted with the car.
Visual Inspection: At the conclusion of the race,
if results are challenged and/or at the option of the Technical Director any
car may be given a thorough breakdown inspection with the body removed. A car disqualified will result in that driver
being removed from a points scoring position for non-compliance.
