REPEATABILITY OF SPRAY TUNNEL MEASUREMENTS. FINAL REPORT

This study was undertaken to upgrade an existing spray tunnel to make it useful as a tool for verifying compliance with performance standards for spray suppressing flaps for heavy trucks. The tunnel was previously developed as a research tool for evaluating the basic spray suppressing qualities of flaps. The upgrading was necessary to eliminate measurement variabilities associated with instrumenation, test procedures, and environmental changes. This study also documents the results of tests comparing measurements made in the modified tunnel with those obtained in a splash and spray test apparatus designed to meet British Standard, BS AU 200: Part 2: 1984. Engineering drawings for the modified tunnel, as well as detailed, step-by-step, procedures for testing flaps in a manner that will ensure repeatable results are presented.

• Corporate Authors:

  Systems Technology, Incorporated

  13766 South Hawthorne Boulevard
  Hawthorne, CA  United States  90250

  National Highway Traffic Safety Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • JOHNSON, W A
  • Stein, A C
  • HOGUE, J R
• Publication Date: 1987-5

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Acceptance tests; Instrumentation; Measurement; Splash guard; Splashing; Test facilities; Test procedures; Testing equipment; Variables
• Uncontrolled Terms: Repeatability; Spray control
• Subject Areas: Highways; Vehicles and Equipment; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00496618
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-807 129
• Contract Numbers: DTNH22-86-C-02017
• Files: HSL, TRIS, USDOT
• Created Date: Aug 31 1990 12:00AM