Defender/Challenger/American Coach F-550 CNG

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Fuel Economy Data (Gaseous Fuels)

Date: 2012-10-23
Run Number: 1
Personnel: G.C., B.L. & E.D.
Test Direction: CCW
Ambient Temperature (°F): 53
Humidity (%): 91
SLW (lbs): 19600
Wind Speed (mpg) & Direction: 2/SW
Barometric Pressure (in.Hg): 30
Cycle Type Run Time (min:sec) Cycle Time
(min:sec)
Fuel Temperature (°F) Total Fuel used (SCF)
Start Finish Start
CBD #1 0 8:34 8:34 61.0 77.0
ART #1 0 3:51 3:51 62.0 48.0
CBD #2 0 8:44 8:44 53.0 77.0
Art #2 0 3:51 3:51 59.0 50.0
CBD #3 0 8:38 8:38 54.0 84.0
Commuter 0 5:58 5:58 60.0 79.0
Total Fuel: 415.0 SCF
20 minute idle: 72 SCF
No Load Flow Rate at Idle = 3.90 SCFM No Load Flow Rate at Full Throttle = 14.10 SCFM
Heating Value = 1008.1 BTU/LB
Comments: None noted.

Date: 2012-10-23
Run Number: 2
Personnel: G.C., B.L. & E.D.
Test Direction: CW
Ambient Temperature (°F): 55
Humidity (%): 88
SLW (lbs): 19600
Wind Speed (mpg) & Direction: 3/SW
Barometric Pressure (in.Hg): 30
Cycle Type Run Time (min:sec) Cycle Time
(min:sec)
Fuel Temperature (°F) Total Fuel used (SCF)
Start Finish Start
CBD #1 0 8:58 8:58 60.0 83.0
ART #1 0 3:56 3:56 63.0 48.0
CBD #2 0 8:45 8:45 57.0 80.0
Art #2 0 3:54 3:54 64.0 46.0
CBD #3 0 8:37 8:37 59.0 77.0
Commuter 0 5:58 5:58 64.0 76.0
Total Fuel: 410.0 SCF
20 minute idle: SCF
No Load Flow Rate at Idle = SCFM No Load Flow Rate at Full Throttle = SCFM
Heating Value = 1008.1 BTU/LB
Comments: None noted.

Date: 2012-10-23
Run Number: 3
Personnel: B.L., E.D. & G.C.
Test Direction: CCW
Ambient Temperature (°F): 66
Humidity (%): 64
SLW (lbs): 19600
Wind Speed (mpg) & Direction: 4/SW
Barometric Pressure (in.Hg): 30
Cycle Type Run Time (min:sec) Cycle Time
(min:sec)
Fuel Temperature (°F) Total Fuel used (SCF)
Start Finish Start
CBD #1 0 8:43 8:43 79.0 82.0
ART #1 0 3:55 3:55 73.0 47.0
CBD #2 0 8:42 8:42 63.0 80.0
Art #2 0 3:58 3:58 68.0 46.0
CBD #3 0 8:29 8:29 62.0 80.0
Commuter 0 5:55 5:55 68.0 78.0
Total Fuel: 413.0 SCF
20 minute idle: SCF
No Load Flow Rate at Idle = SCFM No Load Flow Rate at Full Throttle = SCFM
Heating Value = 1008.1 BTU/LB
Comments: None noted.

Date: 2012-10-23
Run Number: 4
Personnel: B.L., E.D. & G.C
Test Direction: CW
Ambient Temperature (°F): 70
Humidity (%): 53
SLW (lbs): 19600
Wind Speed (mpg) & Direction: 4/SW
Barometric Pressure (in.Hg): 30
Cycle Type Run Time (min:sec) Cycle Time
(min:sec)
Fuel Temperature (°F) Total Fuel used (SCF)
Start Finish Start
CBD #1 0 8:30 8:30 71.0 79.0
ART #1 0 3:58 3:58 73.0 48.0
CBD #2 0 8:30 8:30 67.0 81.0
Art #2 0 3:58 3:58 73.0 48.0
CBD #3 0 8:38 8:38 68.0 84.0
Commuter 0 5:57 5:57 74.0 78.0
Total Fuel: 418.0 SCF
20 minute idle: 72 SCF
No Load Flow Rate at Idle = SCFM No Load Flow Rate at Full Throttle = SCFM
Heating Value = 1008.1 BTU/LB
Comments: None noted.