WHEELBASE DATA SUMMARY


TRK CTRS are the dimension from center to center of truck bolster, not the jacking pads. WHB is the wheelbase of the individual truck. This data is for units as delivered from the manufacturers. Always refer to pictures of the unit to be modeled as many trucks are interchangeable. The trucks were sometimes swapped by the Railroads or rebuilders.
ELECTROMOTIVE DIV. OF GENERAL MOTORS
TRK CTRS TYPE WHB MODEL
35-00 BLOM "B" 9'-00" BL1,BL2
30-00 BLOM "B" 9'-00" CF7
43-00 A-1-A 14'-01" EA,E2,E3,E4,E5,E6,E7,E8,E9
27-03 BLOM "B" 9'-00" FT
30-00 BLOM "B" 9'-00" F2,F3,F5,F7,F9
41-08 FLEX "A" 13'-07" F45
34-00 BLOM "B" 9'-00" FP7,9,FL9
31-00 BLOM "B" 9'-00" GP7,GP9,GP18,GP20,GP28
29-09 BLOM "M" 9'-00" GP15
32-00 BLOM "B" 9'-00" GP30,GP35
34-00 BLOM "B" 9'-00" GP38,GP38AC,GP38-2,GP39,GP39-2
34-00 BLOM "B" 9'-00" GP40,50,60
37-03 BLOM "B" 9'-00" GP40P,GP40-2,GP40P-2
40-06 BLOM "B" 9'-00" GP40TC
24-02 BLOM "M" 9'-00" MP-15,MP15AC,MP15DC
22-00 AAR "A" 8"-00" NC1,NW1
31-00 BLOM "B" 9'-00" NW3,NW5,TR1
24-10 AAR "B" 9'-04" NW4
28-06 FLEX "B" 9'-00" RS1325
22-00 AAR "A" 8"-00" SC,SW'S,TR'S
35-00 FLEX C1 13'-07" SD7,SD9,SD18,SD24,SD28,SD35,SDP35
40-00 FLEX C's 13'-07" SD38,,SD39,SD40,,SDP40,SD45
43-06 FLEX C's 13'-07" SD38-2,SD40-2,SD45-2
30-00 SPECIAL 12'-02" SDL39
45-05 FLEX C's 13'-07" SD40T2,SD45T2,SD45X
46-00 FLEX C's 13'-07" SDP45
45-10 HTCR 13'-08" SD50,SD60,SD60m
48-08 HTCR 13'-08" SD70,SD70mac,SD76m
33-00 AAR "B" 9'-04" TA

NOTES FOR EMD 4 WHEEL TRUCKS

AAR type "A" trucks used on switcher units had a whb of 8'-00".

AAR type "B" trucks used on road units had a whb of 9'-04" with GE traction motors and 9'-10" with Westinghouse traction motors.

BLOMBERG type "B" early EMD truck used on 4 axle road units 9'-00".

BLOMBERG type "M" later EMD truck used on 4 axle road units 9'-00".

FLEXICOIL 4 axle truck used on some switcher units had a whb of 8'-00", another version used only on the FL9 had a whb of 9'-00".

NOTES FOR EMD 6 WHEEL TRUCKS

FLEXICOIL C1 truck early sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have three brake cylinders mounted at top of each sideframe and clasp type brakes. These were used on the SD7,9,18,24, early 28 &35's.

FLEXICOIL C1M truck early sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have been modified to two brake cylinders mounted at top of each sideframe and single shoe brakes. Seen on conrail SD50's.

FLEXICOIL C2H1L truck modified sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have two brake cylinders mounted low and one nounted high on each sideframe, single shoe type brakes. Introduced early 1967. Pictures are the best answer the question of which unit had which trucks. Some SD38, 40 & 45's used these trucks.

FLEXICOIL C2H truck modified sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have two brake cylinders mounted high on the frame, single shoe type brakes. Introduced in 1968 Pictures are the best answer the question of which unit had which trucks. Some SD38, 40 & 45's used these trucks.

FLEXICOIL C2C truck modified sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have three brake cylinders mounted high on each sideframe, with clasp type brakes. Introduced in 1968. Pictures are the best answer the question of which unit had which trucks. Some SD38, 40 & 45's used these trucks.

FLEXICOIL C2L truck modified sideframe castings, whb of 13'-07". Wheel centers are 6'-09 1/2" and 6'-09 1/2". These trucks have two brake cylinders mounted low on each sideframe and single shoe type brakes. These were used on the late SD28 &35, and some SD45's.

FLEXICOIL SPECIAL

The SPECIAL trucks used on the SDL-39 were 3 axle with a wheelbase of 12'-02". Uneven spacing of 5'-06 1/2" and 6'-07 1/2".

HTC TRUCKS have a wheelbase of 13'-08"

A-1-A units used on EMD passenger units to reduce axle loading had a whb of 14'-01".

GP BLOMBERG 4 WHEEL TRUCKS

SD FLEXICOIL 6 WHEEL TRUCKS

More EMD Information

S.A. McCall