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D3 2008 1/24 Le Mans Coupes racing class rules
(version V4, 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. A three-sided motor bracket including rear axle
carrier is mandatory. The motor must be attached to the bracket with no less
than two machine-screws. 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: Inline drive only, with the motor shaft at 90 degrees to the
rear axle as viewed from above.
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 in places 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.
3g: No on-board automatic liquid dispenser of any kind 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). 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-MESAC 1969 Porsche 917SH
Electric Dreams-Russkit Chaparral 2D
Electric Dreams-Dynamic Lola T70 MKIIIB
Electric Dreams-Dynamic Ford MKIV
ToyTech-Dynamic Ferrari P3/P4
ToyTech-Dynamic Porsche 908
TrueScale-Dynamic Porsche 908
TrueScale-Dynamic Ferrari P3/P4
TrueScale-Dynamic McLaren M6
O/S Chevron B16
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 and any
reproduction of the MAC "Porsche" coupe bodies are not allowed as they do not
meet the spirit of the rules.
5b. Spoilers and air control:
-Material: clear plastic
-Maximum visible size of the actual material: 3.125" X 0.5".
-Must be flat where visible.
-Must not extend higher than 1/2" from the highest point in the center of one
rear fender.
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-No side dams of any type are
allowed. -Front diaplanes are not allowed. -High wings are allowed on specific models (Chaparral 2E/2G/2H/2F, Lola T163, McLaren M8C...) |
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.
