NEW FLYER Download PDF ReportNew Flyer Industries, Ltd. submitted a model GE40LF, gasoline-powered 39 seat/40-foot bus, for a 12 yr/500,000 mile STURAA test. The odometer reading at the time of delivery was 1,015.0 miles. Testing started on January 8, 2004 and was completed on September 8, 2004. 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 January 20, 2004 and was completed on August 26, 2004.
The interior of the bus is configured with seating for 39 passengers including the driver. Free floor space will accommodate 37 standing passengers resulting in a potential capacity of 76 persons. At 150 lbs per person, this load results in a measured gross vehicle weight of 39,570 lbs. In order to avoid exceeding the GAWR of the front axle (13,230 lbs) and the rear axle (24,700 lbs), ballast for 13 standing passengers was eliminated. This reduction from full capacity resulted in an adjusted measured gross vehicle weight of 38,090 and was used for all dynamic testing. The first segment of the Structural Durability Test was performed with the bus loaded to a GVW of 38,090 lbs. The middle segment was performed at a SLW of 34,940 lbs and the final segment was performed at a CW of 29,200 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 one Class 1 failure which caused a loss of power steering when the A/C compressor locked up causing the inverter to over load (which also powers the air compressor, and in turn drives the power steering pump). There were no Class 2 failures. Of the remaining 41 reported failures, 27 were Class 3 and 14 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 45.14 seconds.
The Shakedown Test produced a maximum final loaded deflection of 0.093 inches with a permanent set ranging between –0.005 to 0.005 inches under a distributed static load of 28,500 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 35,040 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 3.9 inches.
A Fuel Economy Test was run on simulated central business district, arterial, and commuter courses. The results were 4.50 mpg, 4.34 mpg, and 7.12 mpg respectively; with an overall average of 4.97 mpg.
A series of Interior and Exterior Noise Tests was performed. These data are listed in Section 7.1 and 7.2 respectively.