NORTH AMERICAN BUS INDUSTRIES Download PDF Report
North American Bus Industries, Inc. submitted a model 416.05, diesel-powered 43 seat (including the driver) 40-foot bus, for a 12 yr/500,000 mile STURAA test. The odometer reading at the time of delivery was 21,299 miles. Testing started on August 17, 2010 and was completed on June 6, 2011. The Check-In section of the report provides a description of the bus and specifies its major components.
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 failures. Of the 19 reported failures, two were Class 2, 11 were Class 3 and six were Class 4.
The Safety Test, (a double-lane change, obstacle avoidance test) 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 40.75 seconds. The Stopping Distance phase of the Brake Test was completed with the following results; for the Uniform High Friction Test average stopping distances were 32.56’ at 20 mph, 64.09’ at 30 mph, 113.13’ at 40 mph and 129.42’ at 45 mph. The average stopping distance for the Uniform Low Friction Test was 31.84’. There was no deviation from the test lane during the performance of the Stopping Distance phase. During the Stability phase of Brake Testing the test bus experienced no deviation from the test lane but did experience pull to the left during both approaches to the Split Friction Road surface. The Parking Brake phase was completed with the test bus maintaining the parked position for the full five minute period with no slip or roll observed in both the uphill and downhill positions.
The Shakedown Test produced a maximum final loaded deflection of 0.172 inches with a permanent set ranging between 0.000 to 0.004 inches under a distributed static load of 27,000 lbs. The Distortion Test was completed with all subsystems, doors and escape mechanisms operating properly. No water leakage was observed throughout the test. All subsystems operated properly.
The Static Towing Test was performed using a target load (towing force) of 35,088 lbs. All four front pulls were completed to the full test load with no damage or deformation observed. The Dynamic Towing Test was performed by means of a front-lift tow. The towing interface was accomplished using a hydraulic under-lift wrecker. The bus was towed without incident and no damage resulted from the test. The manufacturer does not recommend towing the bus from the rear, therefore, a rear test was not performed. 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 6.4 inches.
A Fuel Economy Test was run on simulated central business district, arterial, and commuter courses. The results were 3.74 mpg, 4.10 mpg, and 7.07 mpg respectively; with an overall average of 4.45 mpg.
A series of Interior and Exterior Noise Tests was performed. These data are listed in Section 7.1 and 7.2 respectively.
The Emissions Test was performed. These results are available in Section 8. of this report.