Sr2 Ece R66 Bus Skin ((full)) May 2026

Technical Overview: SR2 ECE R66 Bus Skin

1. Context & Standard (ECE R66)

High-Visibility Framework: The most striking feature of the skin is the application of retro-reflective contour markings. The outline of the bus windows and roof line is traced in fluorescent yellow/orange, ensuring the vehicle is instantly recognizable at night or in adverse weather conditions. sr2 ece r66 bus skin

3. Results

| Skin thickness (mm) | Max pillar intrusion (mm) – R66 | Max intrusion (mm) – SR2 | Mass change (%) |
|---------------------|--------------------------------|--------------------------|------------------|
| 0.7 | 155 (fail) | 212 (fail) | -8% |
| 0.9 | 112 (pass) | 138 (fail) | baseline |
| 1.1 | 89 (pass) | 96 (pass) | +12% |
| 0.9 + corrugation | 98 (pass) | 105 (pass) | +2% | Technical Overview: SR2 ECE R66 Bus Skin 1

• Remove existing 1.0mm skin.
• Weld internal reinforcement gussets into the pillar cavities.
• Re-skin using 1.5mm high-tensile steel with a structural epoxy adhesive (not just spot welds).
• Run new simulations. The skin alone increases rollover resistance by nearly 18% due to membrane tension.

: The "ECE R66" designation refers to the international regulation for the strength of bus superstructures during rollover, reflecting the realism of the original Laksana body. Custom Skin (Livery) Details Remove existing 1

• Material: High-tensile pre-coated steel or aluminum alloy (depending on variant). Thickness typically ranges from 1.2mm to 1.8mm.
• Joint Type: Structural adhesive bonding combined with blind rivets (or Huck bolts) to distribute stress and prevent tear propagation during deformation.
• Panel Design: Large, single-curvature or double-curvature pressed panels with integrated strengthening ribs (hidden beneath the paint or internal lining).