LOW FLOOR

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Gillig submitted a model Low Floor, diesel-powered, diesel/electric hybrid, 39 seat (including the driver), 42-foot bus, for a partial STURAA test in the 12 yr/500,000 mile category.  The Federal Transit Administration determined that the following test would be performed: 1.2 Servicing, P.M., Repair & Maintenance, 1.3 R/R of Selected Subsystems, 2. Reliability, 4. Performance, 5.7 Structural Durability, 6. Fuel Economy and 7. Noise Tests.  Testing started on July 28, 2009 and was completed on February 23, 2010.  The Check-In section of the report provides a description of the bus and specifies its major components.

 

The primary part of this partial test was the Structural Durability Test, which also provides the information for the Maintainability and Reliability results.  The Structural Durability Test was started on July 31, 2009 and was completed on February 3, 2010.

 

The interior of the bus is configured with seating for 39 passengers including the driver.  Free floor space will accommodate 35 standing passengers resulting in a potential load of 74 persons.  At 150 lbs per person, this load results in a measured gross vehicle weight of 40,650 lbs.  In order to avoid exceeding the GAWR (25,000 lbs) of the rear axle, ballast for 26 standing passengers was eliminated.  This reduction from full capacity resulted in an adjusted measured gross vehicle weight of 36,910 lbs and was used for all dynamic testing.  The middle segment was performed at a SLW of 35,600 lbs and the final segment was performed at a CW of 29,960 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 are provided in the Maintainability section of this report.

 

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 seventeen reported failures, 10 were Class 3 and 7 were Class 4.

 

 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 46.69 seconds.

 

A Fuel Economy Test was run on simulated central business district, arterial, and commuter courses.  The results were 3.72 mpg, 4.67 mpg, and 8.34 mpg respectively; with an overall average of 4.74 mpg.

 

A series of Interior and Exterior Noise Tests was performed.  These data are listed in Section 7.1 and 7.2 respectively.

Number: 0914
Model: LOW FLOOR
Manufacturer: GILLIG CORPORATION
Vin Number: 15GGD271781077749