Athearn Genesis UP 4-8-8-4 Big Boy Locomotive 4001
Model Information
The size ratio of the model relative to the real-world prototype (e.g., HO, N, O).
HO
The marketing brand under which the item is sold (e.g., Athearn, Walthers).
Athearn
A specific product line within the brand (e.g., Genesis, Mainline).
Genesis
The general category of the item (e.g., Locomotive, Rolling Stock).
Locomotive
A more specific classification (e.g., Diesel-Electric, Boxcar).
Steam
A detailed description of the specific car or locomotive type (e.g., GP38-2, Plug Door Insulated Steel).
4-8-8-4 Big Boy
The actual entity that manufactured the model, if different from the brand.
Athearn
The stock keeping unit (SKU) or catalog number assigned by the manufacturer.
G97220
The name of the railroad or owner.
Union Pacific (UP)
The specific number assigned to this individual car or locomotive.
4001
The alphabetic code identifying the owner (e.g., UP, BNSF).
UP
Curated list of common equipment details like DCC, Sound, Powered status, etc.
Additional attributes or equipment details not covered by standard features.
Prototype Details
The builder of the real-world equipment (e.g., EMD, GE, ACF).
ALCO
The build date, if printed on the model.
-
The rebuild date, if printed on the model.
-
The reweigh date, if printed on the model.
-
The earliest time period appropriate for this item.
Transition (1940 - 1960)
The specific decades during which this item would be prototypical in revenue service.
1960s
1950s
1940s
The approximate length of the car in feet.
-
Specific measurements of the model or prototype. Format: [Type] [Value] (e.g. IL 40'6").
Allowed types:
• IL (Inside Length)
• IW (Inside Width)
• IH (Inside Height)
• OL (Outside Length)
• OW (Outside Width)
• OH (Outside Height)
• EH (Eaves Height)
• EW (Eaves Width)
• EXH (Extreme Height)
• EXW (Extreme Width)
-
Volume or weight capacity markings as labeled on the model or prototype. Format: [Type] [Value] (e.g. CUFT 3000).
Allowed types:
• CUFT (Cubic Feet)
• CAPY (Nominal Capacity)
• LDLMT (Load Limit)
• LTWT (Light Weight)
• GRL (Gross Rail Load)
• MAX WGT (Max Cargo Weight)
• GAL (Gallons)
• US GAL (US Gallons)
• IMP GAL (Imperial Gallons)
• LITERS (Liters)
• KG (Kilograms)
• SHELL (Shell Capacity)
• DOME (Dome Capacity)
• WATER CAPY (Water Capacity)
• ICE CAPY (Ice Bunker Capacity)
• BKR CAPY (Bunker Capacity)
• LEVEL (Level Full Capacity)
-
Availability
The date the model was announced by the manufacturer.
April 2009
The estimated arrival date for the model provided by the manufacturer at the time of announcement.
February 2010
The actual date the model became available at retailers.
-
The Manufacturer's Suggested Retail Price at the time of announcement.
$364.98
Model Information
The size ratio of the model relative to the real-world prototype (e.g., HO, N, O).
HO
The marketing brand under which the item is sold (e.g., Athearn, Walthers).
Athearn
A specific product line within the brand (e.g., Genesis, Mainline).
Genesis
The general category of the item (e.g., Locomotive, Rolling Stock).
Locomotive
A more specific classification (e.g., Diesel-Electric, Boxcar).
Steam
A detailed description of the specific car or locomotive type (e.g., GP38-2, Plug Door Insulated Steel).
4-8-8-4 Big Boy
The actual entity that manufactured the model, if different from the brand.
Athearn
The stock keeping unit (SKU) or catalog number assigned by the manufacturer.
G97220
The name of the railroad or owner.
Union Pacific (UP)
The specific number assigned to this individual car or locomotive.
4001
The alphabetic code identifying the owner (e.g., UP, BNSF).
UP
Curated list of common equipment details like DCC, Sound, Powered status, etc.
Additional attributes or equipment details not covered by standard features.
Model Information
The size ratio of the model relative to the real-world prototype (e.g., HO, N, O).
HO
The marketing brand under which the item is sold (e.g., Athearn, Walthers).
Athearn
A specific product line within the brand (e.g., Genesis, Mainline).
Genesis
The general category of the item (e.g., Locomotive, Rolling Stock).
Locomotive
A more specific classification (e.g., Diesel-Electric, Boxcar).
Steam
A detailed description of the specific car or locomotive type (e.g., GP38-2, Plug Door Insulated Steel).
4-8-8-4 Big Boy
The actual entity that manufactured the model, if different from the brand.
Athearn
The stock keeping unit (SKU) or catalog number assigned by the manufacturer.
G97220
The name of the railroad or owner.
Union Pacific (UP)
The specific number assigned to this individual car or locomotive.
4001
The alphabetic code identifying the owner (e.g., UP, BNSF).
UP
Curated list of common equipment details like DCC, Sound, Powered status, etc.
Additional attributes or equipment details not covered by standard features.
The official description provided by the manufacturer.
The Genesis™ 4-8-8-4 Big Boy has been a huge success. The next logical step is to offer this massive model with factory weathering, replicating their in-service appearance. Features include: • Boiler backhead with full details and printed gauges. • Individually applied detail parts such as piping, valves, generators, etc. • Blackened metal RP25 wheels. • Eccentric cranks operating on both sides in correct direction. • Front and rear engines (cylinders and coupled drive wheel sets), both pivot for 22" recommended min. radius. • Pilot has open/closed positions. Coupler pocket can be inserted to mount coupler. • Adjustable cab windows and opening doors. • Headlights and tender lighting feature directional light change; number boards are also lighted. • Five-pole, skewed armature motor with two flywheels for very smooth running. • Cab hatches can be either closed or open. • See-through running boards. • Ready for aftermarket smoke unit installation with no soldering needed. • Factory installed DCC sound board and speaker. The board and speaker are mounted in the tender. • DCC decoder automatically senses the power supply type (either DC or NMRA compliant DCC system).
Additional community-contributed notes or observations.
Initial Source: 01_GEN_WEA_BigBoy_042109.pdf