F
Details of Aerodynamic Trailer Device Technology

Tables F-1 through F-3 report results from a collection of suppliers that provided trailer aerodynamic device results in more detail for trailer skirts, trailer base devices, and trailer face devices, three of the areas identified in Figure 5-9 (Chapter 5) as prime for aerodynamic device improvement in tractor-trailer combination trucks. These data are principally those returned by nine manufacturers responding to a committee questionnaire. Those responses were supplemented by information from the Web sites of four other manufacturers.

Interestingly, these most recent data on reduction of fuel consumption received from developers/manufacturers for trailer skirts (Table F-1) substantially group around 7 percent.

TABLE F-1 Trailer Skirt Information from Manufacturers

Item

Manufacturer

Qualified for SmartWay (Y/N)

Fuel Consumption Reduction (gal/mile) (%)

Evaluation Method (provide details)

Weight to Equip 53-ft Trailer, (lb)

Retail Price Equivalent for One Trailer (US$)

Estimated Annual Maintenance Cost (USD)

Other Useful Information

1

Laydon

Y

6

J1321

300

1,900

0

Very flexible meeting systems

2

FreightWing

Y

7

J1321, 62 mph

160

1,599

$50

Impact resistant; small road clearance

3

AdamWorks

Y

7

self truck test

<200

2,400

$400

Automatically deploys to 6-inch ground clearance

4

TransTexa

a

7.4

J1321, 61 mph

a

a

a

a

5

Windynea

Y

6.9

J1321

a

a

a

Improved handling in side winds

6

ATDynamics

Y

7.4

J1321, 60 mph

175

2,200

0

Reduced road spray, 5-year warranty

7

Wabash

Y

5.6

J1321, 65 mph

250

1,625

0

12-inch ground clearance

aCommittee questionnaire not responded to.



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OCR for page 219
F Details of Aerodynamic Trailer Device Technology Tables F-1 through F-3 report results from a collection a committee questionnaire. Those responses were supple- of suppliers that provided trailer aerodynamic device results mented by information from the Web sites of four other in more detail for trailer skirts, trailer base devices, and manufacturers. trailer face devices, three of the areas identified in Figure 5-9 Interestingly, these most recent data on reduction of (Chapter 5) as prime for aerodynamic device improvement fuel consumption received from developers/manufacturers in tractor-trailer combination trucks. These data are princi- for trailer skirts (Table F-1) substantially group around 7 pally those returned by nine manufacturers responding to percent. TABLE F-1 Trailer Skirt Information from Manufacturers Qualified for Fuel Consumption Evaluation Weight to Retail Price Estimated Annual SmartWay Reduction Method Equip 53-ft Equivalent for Maintenance Cost Other Useful Item Manufacturer (Y/N) (gal/mile) (%) (provide details) Trailer, (lb) One Trailer (US$) (USD) Information 1 Laydon Y 6 J1321 300 1,900 0 Very flexible meeting systems 2 FreightWing Y 7 J1321, 160 1,599 $50 Impact resistant; 62 mph small road clearance 3 AdamWorks Y 7 self truck test <200 2,400 $400 Automatically deploys to 6-inch ground clearance TransTexa a a a a a 4 7.4 J1321, 61 mph Windynea a a a 5 Y 6.9 J1321 Improved handling in side winds 6 ATDynamics Y 7.4 J1321, 175 2,200 0 Reduced road spray, 60 mph 5-year warranty 7 Wabash Y 5.6 J1321, 250 1,625 0 12-inch ground 65 mph clearance aCommittee questionnaire not responded to. 

OCR for page 219
0 TECHNOLOGIES AND APPROACHES TO REDUCING THE FUEL CONSUMPTION OF MEDIUM- AND HEAVY-DUTY VEHICLES TABLE F-2 Trailer Base Device Information from Manufacturers Qualified for Fuel Consumption Weight to Retail Price Estimated Annual SmartWay Reduction (gal/ Evaluation Equip 53-ft Equivalent for Maintenance Cost Other Useful Item Manufacturer (Y/N) mile) (%) Method Trailer (lb) One Trailer (US$) (US%) Information 1 ATDynamics Y 5.1 J1321, 175 2,800 0 Folds flat in 6 sec; boat tail 62 mph improves stability AeroTrailerSysa a a a a a 2 3 Automatically deploys inflatable tail TransTexa boat a a a a a 3 2.9 Reduces road spray tail 4 AirTab vortex N 2-3 Truck test, 1 220 0 Reduces road spray generators 47 mph aCommittee questionnaire not responded to. SOURCE: Data from responses to committee questionnaire and from manufacturers’ websites. TABLE F-3 Trailer Face Device Information from Manufacturers Qualified for Fuel Consumption Weight to Retail Price Estimated Annual SmartWay Reduction (gal/mile) Evaluation Equip 53-ft Equivalent for One Maintenance Cost Other Useful Item Manufacturer (Y/N) (%) Method Trailer (lb) Trailer (US$) (USD) Information 1 Laydon Vortex N 1 J1321 40 495 0 Better performance in Stabilizer yaw 2 Laydon Nose Y 2 J1321 95 795 0 No tractor interference Fairing 3 FreightWing Gap Y 2 J1321, 75 849 $50 Better performance with Fairing 65 mph low aerodynamic tractor 4 NoseCone Y? >3 J1321? 30 — — For high tractor roof Eyebrow fairing 5 NoseCone Y? >4 J1321? 75 1,264 $35 No yaw effect in J1321