NEW FLYER Download PDF Report
New Flyer Industries, Ltd., submitted a model D 40 Invero, diesel-fueled, 42 seat/40-foot bus, for a 12 yr/500,000 mile STURAA test. The odometer reading at the time of delivery was 8,884 miles. Testing started on December 13, 2001 and was completed on July 12, 2002. 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 was started on December 21, 2001 and was completed on June 11, 2002.
The interior of the bus is configured with seating for 42 passengers including the driver. Free floor space will accommodate 45 standing passengers resulting in a potential capacity of 87 persons. At 150 lbs per person, this load results in a measured gross vehicle weight of 41,380 lbs. In order to avoid exceeding the GAWR (26,000 lbs) of the rear, ballast for 10 standing passengers was removed. This reduction in passenger weight resulted in an adjusted GVW of 40,090 lbs. The middle segment was performed at a seated load weight of 34,690 lbs and the final segment was performed at a curb weight of 28,200 lbs. Durability driving resulted in unscheduled maintenance and failures that involved a variety of subsystems. 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 fifty-six reported failures, thirty-six were Class 3 and twenty 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 39.34 seconds.
The Shakedown Test produced a maximum final loaded deflection of 0.168 inches with a permanent set ranging between -0.004 to 0.002 inches under a distributed static load of 32,250 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 33,840 lbs. The front up, down and right pulls were performed to the full target test load with no damage or deformation observed. The front test was terminated during the 20° left pull at approximately 24,900 lbs of force when the right tow eye weld failed. The Dynamic Towing Test was performed by means of a front-lift tow. The towing interface was accomplished using a hydraulic-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 3.9 inches.
A Fuel Economy Test was run on simulated central business district, arterial, and commuter courses. The results were 3.39 mpg, 3.83 mpg, and 7.02 mpg respectively; with an overall average of 4.14 mpg.
A series of Interior and Exterior Noise Tests was performed. These data are listed in Section 7.1 and 7.2 respectively.