SUPREME CORPORATION Download PDF Report
Supreme Corporation submitted a model Trolley TR 31, gasoline-powered 29 seat (including the driver) 32-foot trolley, for a partial STURAA test in the 7yr/200,000 mile category. The Federal Transit Administration determined that the following tests would be performed; 2. Reliability and 5.7 Structural Durability Test. Testing started on January 3, 2003 and was completed on February 24, 2003. 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 Reliability results. The Structural Durability Test was started on January 7, 2003 and was completed on February 20, 2003.
The interior of the trolley is configured with seating for 29 passengers including the driver. Free floor space will accommodate 26 standing passengers resulting in a potential load of 55 persons. At 150 lbs per person, this load results in a measured gross vehicle weight of 23,760 lbs. In order to avoid exceeding the GAWR (7,000 lbs) of the front axle and (13,500 lbs) of the rear axle, ballast for all 26 standing passengers and four front seated passengers was eliminated. This reduction from full capacity resulted in an adjusted measured gross vehicle weight of 19,260 lbs and was used for all dynamic testing. The middle SLW segment was performed at the same 19,260 lbs. (Note; the SLW segment was performed with the ballast for the four front seated passengers removed). The final CW segment was performed at 15,530 lbs. Durability driving resulted in unscheduled maintenance and failures that involved a variety of subsystems.
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 trolley encountered no Class 1 or Class 2 failures. Of the 12 reported failures, eight were Class 3 and four were Class 4.