Atlas HO B23-7 Locomotive

General Electric’s “Dash 7” locomotive line was introduced as a replacement for the older “Universal-Series” of the 60s and early 70s. “Dash 7” series improvements included increased fuel efficiency, tractive effort and reliability. The B23-7 was a direct replacement for the 2,250HP U23B model. The first units were produced for Conrail in September, 1977 (ironically, 3 months after the last U23B was delivered to Conrail). Production continued through 1984, with a total of 535 units built. Conrail was the largest purchaser of the model, with a total fleet of 141 units.
Several features distinguished B23-7s from predecessor models. The long hood stepped outward in the area of the exhaust stack to accommodate a relocated oil cooler. In addition, the frame was 2 feet longer than that of the U23B. An FB-2 style truck was offered as standard equipment on B23-7s, but some railroads opted to use “trade-in” trucks. Therefore, AAR type B and Blomberg trucks could be found on some models. The six power assembly doors (located near the center of the long hood) indicated that the B23-7 was powered by a 12-cylinder GE FDL engine.
There were three distinct “phases” of GE 4-axle “Dash 7” locomotive production. Models on this run represent both “phase 1” and "phase 2" units. Phase 1 units feature a 36’2” wheel base and were built through the Spring of 1979. Phase 2 units feature a 37' 2" wheel base, and production lasted from the Spring of 1979 through the Fall of 1980.
The Atlas B23-7 locomotive model includes such optional/road name specific details as:
• Pilots with and without anti-climber
• Cab headlights or low-nose headlights
• Cab with 4 or 2 side windows
• Bell mounted under the sill or on the long hood
• FB-2, AAR type B, or Blomberg truck side-frames used where appropriate per road name
Additional Features:
Atlas Master™ Series Silver Additional Features:
Atlas Master™ Series Gold Additional Features:
QSI® Quantum System™ Features Including:
(Atlas Master Series Gold locomotives only)
Note: Due to the higher starting voltage required to operate the sound system, it is not possible to MU a non-sound-equipped loco in DC (analog) mode
AccuMate® couplers are made under license from AccuRail, Inc.
(Technical artwork and models from previous run shown)
| Item# | Road Name | Road Number | Body Styel |
| HO B23-7 Locomotive (Low Nose) - New Paint Schemes! Atlas Master Series Silver - (Without Decoder and Sound) [DCC Ready] | |||
| 8005 | Undecorated - "Phase 2" Low Nose without Nose H/L | - | 1 |
| 8080 | Arkansas-Oklahoma Railroad (Red/Yellow) | 4059 | 1 |
| 8081 | Arkansas-Oklahoma Railroad (Red/Yellow) | 4061 | 1 |
| 8082 | FNM (Blue/Orange) | 9141 | 2 |
| 8083 | FNM (Blue/Orange) | 9152 | 2 |
| 8084 | FNM (Blue/Orange) | 9157 | 2 |
| 8085 | Metro-North (Red/Blue/Silver) | 801 | 1 |
| 8086 | Metro-North (Red/Blue/Silver) | 802 | 1 |
| 8087 | Metro-North (Red/Blue/Silver) | 807 | 1 |
| HO B23-7 Locomotive (Low Nose) - New Road Numbers! Atlas Master Series Silver - (Without Decoder and Sound) [DCC Ready] | |||
| 8088 | Santa Fe (Blue/Yellow) | 6366 | 1 |
| 8089 | Santa Fe (Blue/Yellow) | 6372 | 1 |
| 8090 | Santa Fe (Blue/Yellow) | 6379 | 1 |
| HO B23-7 Locomotive (High Nose) - New Paint Schemes! Atlas Master Series Silver - (Without Decoder and Sound) [DCC Ready] | |||
| 8004 | Undecorated - "Phase 1" High Short Hood | - | 3 |
| 8091 | Franklin Industrial Minerals‡ (Gray/Red) | 4021 | 4 |
| 8092 | Franklin Industrial Minerals‡ (Gray/Red) | 4023 | 4 |
| HO B23-7 Locomotive (High Nose) - New Road Numbers! Atlas Master Series Silver - (Without Decoder and Sound) [DCC Ready] | |||
| 8093 | Norfolk Southern (Black/White) | 3976 | 3 |
| 8094 | Norfolk Southern (Black/White) | 3980 | 3 |
| 8095 | Norfolk Southern (Black/White) | 3985 | 3 |
| 8096 | Southern (Black/Imit. Aluminum) | 3970 | 3 |
| 8097 | Southern (Black/Imit. Aluminum) | 3978 | 3 |
| 8098 | Southern (Black/Imit. Aluminum) | 3989 | 3 |
| *CSX Licensed Product ‡Paint scheme is accurate for a Phase 3 B23-7 Loco BS 1: Phase 2 sill, w/anticlimber w/o nose HL BS 2: Phase 2 sill, w/o anticlimber or nose HL BS 3: Phase 1 sill, high nose w/o anticlimber BS 4: Phase 2 sill, high nose w/o anticlimber | |||
| Item# | Road Name | Road Number | Body Style |
| HO B23-7 Locomotive (Low Nose) - New Paint Schemes! Atlas Master Series Gold (With Decoder & Sound) | |||
| 8105 | Undecorated - "Phase 2" Low Nose without Nose H/L | - | 1 |
| 8180 | Arkansas-Oklahoma Railroad (Red/Yellow) | 4059 | 1 |
| 8181 | Arkansas-Oklahoma Railroad (Red/Yellow) | 4061 | 1 |
| 8182 | FNM (Blue/Orange) | 9133 | 2 |
| 8183 | FNM (Blue/Orange) | 9153 | 2 |
| 8184 | FNM (Blue/Orange) | 9173 | 2 |
| 8185 | Metro-North (Red/Blue/Silver) | 801 | 1 |
| 8186 | Metro-North (Red/Blue/Silver) | 802 | 1 |
| 8187 | Metro-North (Red/Blue/Silver) | 807 | 1 |
| HO B23-7 Locomotive (Low Nose) - New Road Numbers! Atlas Master Series Gold (With Decoder & Sound) | |||
| 8188 | Santa Fe (Blue/Yellow) | 6371 | 1 |
| 8189 | Santa Fe (Blue/Yellow) | 6378 | 1 |
| 8190 | Santa Fe (Blue/Yellow) | 6381 | 1 |
| HO B23-7 Locomotive (High Nose) - New Paint Schemes! Atlas Master Series Gold (With Decoder & Sound) | |||
| 8104 | Undecorated - "Phase 1" High Short Hood | - | 3 |
| 8191 | Franklin Industrial Minerals‡ (Gray/Red) | 4021 | 4 |
| 8192 | Franklin Industrial Minerals‡ (Gray/Red) | 4023 | 4 |
| HO B23-7 Locomotive (High Nose) - New Road Numbers! Atlas Master Series Gold (With Decoder & Sound) | |||
| 8193 | Norfolk Southern (Black/White) | 3977 | 3 |
| 8194 | Norfolk Southern (Black/White) | 3983 | 3 |
| 8195 | Norfolk Southern (Black/White) | 3984 | 3 |
| 8196 | Southern (Black/Imit. Aluminum) | 3973 | 3 |
| 8197 | Southern (Black/Imit. Aluminum) | 3979 | 3 |
| 8198 | Southern (Black/Imit. Aluminum) | 3988 | 3 |
| *CSX Licensed Product ‡Paint scheme is accurate for a Phase 3 B23-7 Loco BS 1: Phase 2 sill, w/anticlimber w/o nose HL BS 2: Phase 2 sill, w/o anticlimber or nose HL BS 3: Phase 1 sill, high nose w/o anticlimber BS 4: Phase 2 sill, high nose w/o anticlimber | |||