2008   D3 Coupes   Regulations

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2008 1/24 D3 Coupes racing class rules (version V1, 12-20-07)

1. Intent:

The intention of this class is to provide a class of scratch-built slot cars reflecting the spirit of the mid-1960s racing era, with scale realism and low cost, to attract new and experienced racers and builders.

2. Dimensional Specifications

a. Maximum Overall Chassis Width: 3.125" (measured across any part of the chassis)
b. Maximum Rear Tire width: 0.800"
c. Minimum Rear Tire diameter: 0.8125" (13/16")
d. Minimum Front Tire width: 0.225"
e. Minimum Front Tire diameter: 0.75" (3/4")
f. Minimum Clearance: 0.050" (measured under rear axle including gear), 0.040" under motor can at mounting bracket and 0.015" (measured under front axle). All clearances measured with car standing on a flat tech board on its wheels, without guide.

3. Chassis construction:

3a. Chassis type: Any personally-built or commercially available scratch-built chassis conforming to these specifications and to the spirit of the intent statement is allowed.
3b. Chassis Materials: Brass sheet, rod and tube, steel wire, pin tubing and guide tongues are allowed. Other than guide tongues, stamped steel parts and EDM or laser-cut parts of any material are not allowed unless submitted for approval.
3c. Drive type: open to the imagination.
3d. Other than a drop arm, all hinged movements must be oriented in only one direction (i.e. either side pan hinges OR a plumber hinge, NOT BOTH, meaning that a "loose" hinge may not provide movement in more than one direction). Centerline hinges (flexi hinges) are not allowed. No chassis movement, dynamic or induced, may extend the overall chassis width to more than 3.125".
3e. Front axle: A single straight, round  3/32" minimum-diameter one-piece front axle is required, carrying both front wheels. The axle may be fixed or in a tube.  No visual obstruction of any kind across either front or rear wheels must be seen when viewing the car from its sides.  Small flats can be ground only  for setscrew location. NO hinged front wheel movements are allowed (i.e. no "L" arms). Front wheels may rotate independently.
3f. Guide: One guide flag centered on the longitudinal axis of the chassis (i.e. no sideways "free float" or offset) is allowed.

4. Motor rule:

4a. Motor type: Unopened, unmodified TSR D3 or Falcon VII motor.
Exclusion Clause: Clear violation of motor-tampering rule will result in permanent exclusion from any Division III participation in any form.

5. Body rules

5a. Body style: Bodies must be originals or exact reproductions of pre-1970 Can-Am or Sports/GT bodies by Russkit, MAC, Lancer, Associated, Dynamic etc. No "flattened" or "aerodynamically improved" bodies allowed (i.e. no molded-in spoilers, wings etc that were not on the original full-size car or original mold). Bodies with molded-in cockpits are not allowed even if cut out. Front wheel arches must be cut out. Rear wheel arches may be left closed if the original full-size car ran with closed wheel arches. Bodies must be presentably painted and carry at least three racing numbers, one on each side, and one on the front. No part of the chassis may be seen when looking at the car from its top. Bodies must be molded from material with a minimum thickness of 10 thousands of an inch.

Provisional approved body listing:

Electric Dreams 1969 Porsche 917SH
Electric Dreams Chaparral 2D
Electric Dreams Lola T70 MKIIIB
Electric Dreams Ford MKIV
ToyTech-Dynamic Ferrari P3/P4
ToyTech-Dynamic Porsche 908
TrueScale-Dynamic Porsche 908
TrueScale-Dynamic Ferrari P3/P4
TrueScale-Dynamic McLaren M6

Also: Any and all vintage or exact replicas of 1960's Lancer, Dynamic, Revell, Du-Bro, Russkit and Champion bodies representing a known pre-1970 GT Coupe.
Other bodies must be submitted to The Division III Committee members for approval.
NOTE: The MAC Chevron B16, O/S Chevron B16 and any reproduction of the MAC "Porsche" coupe bodies are not allowed as they do not meet the spirit of the rules for this class.

5b. Spoilers and air control: no material forming any air control device may be fitted to the body.
5c. Cockpit: A separate 3-D driver figure painted in at least 2 colors must be fitted.
 
Any matter regarding this class must be submitted in writing to Division III Committee member Mike Steube.

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