CHANCE COACH, INC. Download PDF Report
Chance Coach Inc. submitted a model Opus LFB-29, diesel powered, 24 seat (including the driver) /29-foot bus, for a 12 yr/500,000 mile STURAA test. The odometer reading at the time of delivery was 251 miles. Testing started on September 26, 2000 and was completed on April 20, 2001. The Check-In section of the report provides a description of the bus and specifies its major components.
The primary part of the test program is the Structural Durability Test, which also provides the information for the Maintainability and Reliability results. The Structural Durability Test started on October 9, 2000 and was completed on April 7, 2001.
The first segment of the Structural Durability Test was performed with the bus loaded to a GVW of 29,200 lbs. The middle segment was performed at a SLW of 25,150 lbs and the final segment was performed at a curb weight of 21,500 lbs. Durability driving resulted in unscheduled maintenance that consisted of a variety of subsystem failures. A description of failures, and a complete and detailed listing of scheduled and unscheduled maintenance is provided in the Maintainability section of this report.
Accessibility, in general, was adequate. Components covered in Section 1.3 (Repair and/or Replacement of Selected Subsystems) along with all other components encountered during testing, were found to be readily accessible and no restrictions were noted.
The Reliability section compiles failures that occurred during Structural Durability Testing. Breakdowns are classified according to subsystems. The data in this section are arranged so that those subsystems with more frequent problems are apparent. The problems are also listed by class as defined in Section 2. The test bus encountered no Class 1 or Class 2 failures. Of the thirty reported failures, fourteen were Class 3 and sixteen were Class 4.
Double-Lane Change (obstacle avoidance) was safely performed in both right-hand and left-hand directions up to a maximum test speed of 45 mph. The performance of the bus is illustrated by a speed vs. time plot. Acceleration and Gradeability Test data are provided in Section 4, Performance. The average time to obtain 50 mph was 40.80 seconds.
The Shakedown Test produced a maximum final loaded deflection of 0.058 inches under a distributed static load of 19,125 lbs. The test resulted in essentially no permanent deflection of the structure. The Distortion Test was completed with all subsystems, doors and escape mechanisms operating properly. Water leakage was observed throughout the test at the left side of the windshield by the body seam and the body seam by the left rear wheel well.
The Static Towing Test was performed using a target load (towing force) 25,800 lbs. All four front and rear pulls were completed to the full target test load with no damage or deformation observed. The Dynamic Towing Test was performed by means of a front flat tow. The towing interface was accomplished using a hydraulic under-lift attached by a clevis to the tow eyes. The bus was towed without incident, and no damage resulted from the test. The Jacking and Hoisting Tests were also performed without incident. The bus was found to be stable on the jack stands, and the minimum jacking clearance observed with a tire deflated was 3.80 inches.
A Fuel Economy Test was run on simulated central business district, arterial, and commuter courses. The results were 3.67 mpg, 3.58 mpg, and 7.15 mpg respectively; with an overall average of 4.22 mpg.
A series of Interior and Exterior Noise Tests was performed. These data are listed in Section 7.1 and 7.2 respectively.
Please refer to the following letter from Chance Coach regarding weights stated on the vin tag.