TABLE G-4 Sensitivity of NPV Results in Table 5-9 to Realizing 100%, 90%, and 50% of Baseline Expectations for Fuel Savings, at a Burdened Fuel Cost of $5 per Gallona,b

Candidate Aircraft/Engine Combination

Time to Recoup Investment (yr)c

Cash Flow at 20-yr Point (million $)c

100%

90%

50%

100%

90%

50%

Re-engining

 

 

 

 

 

 

C-130H/AE 2100d

10.1

10.8

15.7

2,254

1,905

510

C-130H/PW150d

10.9

11.6

17.1

1,869

1,557

311

B-1/F119/5.0

36.6

40.1

>60

−658

−721

−975

E-3/CFM56-2B-1

14.5

15.3

20.4

154

122

−7

E-3/JT8D-219

23.3

24.6

32.1

−58

−75

−142

E-3/CFM56-7B22

10.9

11.6

15.4

380

329

121

E-8/CFM56-2B-1e

E-8/JT8D-219e

E-8/CFM56-7B22e

KC-135D/E: CFM56-2B-1

24.5

26.1

36.6

−210

−265

−485

KC-135D/E: JT8D-219

37.2

39.9

57.3

−556

−592

−738

KC-135D/E: CFM56-7B22

18.7

19.9

27.4

86

6

−311

B-52/F117-PW-100 [4]

12.2

13.0

18.4

771

635

90

B-52/CF34-10A [8]

18.1

19.1

25.5

153

65

−286

B-52/CFM56-5C2 [4]

10.6

11.1

15.0

1,085

938

350

C-5/CF6-80C2 (F103-GE-102)f

Engine modification

 

 

 

 

 

 

KC-135R/T: CFM56-2B-1 (Mod)

42.3

46.0

>60

−957

−1,019

−1,266

C-130H: T56-A427 Modd

10.4

11.0

15.9

1,188

1,004

269

C-130H: T56-S3.5 Modd

13.9

14.8

22.0

481

368

−85

B-1/F101 Mod

6.6

6.9

7.9

924

847

540

KC-10/CF6-50 Mod

3.6

3.6

3.8

351

346

329

NOTE: The engine cost estimates presented are derived from correlations developed for historical military engines and may not reflect the current fair market prices of commercial engines considered in this study. Engine cost estimates vary widely, and the estimates presented may vary by as much as 100 percent from estimates developed by other independent sources such as the IBA Engine Value Book 2005 as reported by Euromoney Institutional Investor, May 1, 2005.

aValues corrected after release of the January 31, 2007, prepublication version of the report.

bThe direct fuel cost component of $5.00 increases at 6 percent per year, and the overhead increases at 3 percent per year.

cShading indicates a recouping of investment costs in less than 20 years and thus a positive cash flow at the 20-year point.

dThe fuel savings noted for the C-130 with new or modified engines are based on the aircraft being flown at the optimal altitude and airspeed for the selected engines and propellers. The flexibility exists in most C-130 missions for the aircraft to be operated at the best range or fuel consumption conditions. The other aircraft and engines considered in the study are operated at their prescribed mission conditions.

eE-8 re-engining already ongoing.

fC-5 re-engining already ongoing.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement