{"id":7771444838646,"title":"MTH 20-21722-1 - SD24 Diesel Engine \"Santa Fe\" #946 w\/ PS3","handle":"mth-20-21722-1-premier-sd24-diesel-engine-santa-fe-946-w-proto-sound-3-0","description":"\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eAnnounced Date:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eJuly 2022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eReleased Date:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eEst. Dec\u003cspan data-mce-fragment=\"1\"\u003e 2022\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eIndividually Boxed:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003eRoad Name: Santa Fe\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRoad Number: 946\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Line: Premier\u003c\/li\u003e\n\u003cli\u003eScale: O \u003cspan mce-data-marked=\"1\" data-mce-fragment=\"1\"\u003eScale\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eEstimated Release: Dec\u003cspan data-mce-fragment=\"1\"\u003e 2022\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIntricately Detailed, Durable ABS Body\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDie-Cast Truck Sides, Pilots and Fuel Tank\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Chassis\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Handrails and Horn\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMoveable Roof Fans\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Body Side Grilles\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDetachable Snow Plow\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Handpainted Engineer Cab Figures\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAuthentic Paint Scheme\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Wheels, Axles and Gears\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Remote-Controlled Proto-Couplers\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePrototypical Rule 17 Lighting\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDirectionally Controlled Constant Voltage LED Headlights\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLighted LED Cab Interior Light\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIlluminated LED Number Boards\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLighted LED Marker Lights\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Precision Flywheel-Equipped Motors\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOperating ProtoSmoke Diesel Exhaust\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOnboard DCC\/DCS Decoder\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLocomotive Speed Control In Scale MPH Increments\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1:48 Scale Proportions\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eProto-Sound 3.0 With The Digital Command System Featuring Quillable Horn With Freight Yard Proto-Effects\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUnit Measures: 15 3\/8” x 2 5\/8” x 4”\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOperates On O-36 Curves\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eDiesel DCC Features\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF0 Head\/Tail light\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF1 Bell\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF2 Horn\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF3 Start-up\/Shut-down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF4 PFA\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF5 Lights (except head\/tail)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF6 Master Volume\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF7 Front Coupler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF8 Rear Coupler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF9 Forward Signal\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF10 Reverse Signal\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF11 Grade Crossing\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF12 Smoke On\/Off\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF13 Smoke Volume\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF14 Idle Sequence 3\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF15 Idle Sequence 2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF16 Idle Sequence 1\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF17 Extended Start-up\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF18 Extended Shut-down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF19 Rev Up\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF20 Rev Down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF21 One Shot Doppler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF22 Coupler Slack\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF23 Coupler Close\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF24 Single Horn Blast\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF25 Engine Sounds\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF26 Brake Sounds\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF27 Cab Chatter\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF28 Feature Reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eIn 1958, GM's Electro-Motive Division took a great technological stride forward with the introduction of the turbocharged SD24. In turbocharged engines, exhaust gases are used to power a turbine that increases cylinder air pressure, thus effectively increasing horsepower. In fact, the 16-cylinder model 567 diesel that produced 1800 horsepower in the normally aspirated SD18 locomotive was upgraded to 2400 horsepower in the turbocharged SD24.\u003c\/p\u003e\n\u003cp\u003eTurbocharged engines also run better at varying altitudes, making them ideal for railroads that travel through changing terrain. Look on the left side of the SD24's hood for the semicircular bulge that marks the location of the turbine.\u003c\/p\u003e\n\u003cp\u003eThe SD24s were close relatives of the popular GP-series engines. The primary difference was that SD-series (for \"Special Duty\") locomotives were lengthened to make room for three-axle, three-motor trucks. For a GP and an SD engine of the same horsepower, the extra wheels on an SD locomotive gave it more tractive effort at low speeds and less engine weight on each axle. For this reason, the SD24 and others in the SD series were ideally suited for secondary lines with lighter rail.\u003c\/p\u003e","published_at":"2022-07-26T17:18:19-04:00","created_at":"2022-07-26T17:18:19-04:00","vendor":"MTH Electric Trains","type":"Diesel Locomotive","tags":["200-500","3-rail","diesel-locomotive","mth-electric-trains","pre-order","premier","santa-fe","scale_o"],"price":49995,"price_min":49995,"price_max":49995,"available":true,"price_varies":false,"compare_at_price":55995,"compare_at_price_min":55995,"compare_at_price_max":55995,"compare_at_price_varies":false,"variants":[{"id":44176985063670,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"20-21722-1","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"MTH 20-21722-1 - SD24 Diesel Engine \"Santa Fe\" #946 w\/ PS3","public_title":null,"options":["Default Title"],"price":49995,"weight":0,"compare_at_price":55995,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"continue","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1011\/0560\/products\/20-21722-1.jpg?v=1658870364"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/0560\/products\/20-21722-1.jpg?v=1658870364","options":["Title"],"media":[{"alt":null,"id":30044119466230,"position":1,"preview_image":{"aspect_ratio":3.647,"height":658,"width":2400,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1011\/0560\/products\/20-21722-1.jpg?v=1658870364"},"aspect_ratio":3.647,"height":658,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1011\/0560\/products\/20-21722-1.jpg?v=1658870364","width":2400}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eAnnounced Date:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eJuly 2022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eReleased Date:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eEst. Dec\u003cspan data-mce-fragment=\"1\"\u003e 2022\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 27.2172%;\"\u003eIndividually Boxed:\u003c\/td\u003e\n\u003ctd style=\"width: 67.7828%;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003eRoad Name: Santa Fe\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRoad Number: 946\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduct Line: Premier\u003c\/li\u003e\n\u003cli\u003eScale: O \u003cspan mce-data-marked=\"1\" data-mce-fragment=\"1\"\u003eScale\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eEstimated Release: Dec\u003cspan data-mce-fragment=\"1\"\u003e 2022\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIntricately Detailed, Durable ABS Body\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDie-Cast Truck Sides, Pilots and Fuel Tank\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Chassis\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Handrails and Horn\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMoveable Roof Fans\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Body Side Grilles\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDetachable Snow Plow\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Handpainted Engineer Cab Figures\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAuthentic Paint Scheme\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMetal Wheels, Axles and Gears\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Remote-Controlled Proto-Couplers\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePrototypical Rule 17 Lighting\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDirectionally Controlled Constant Voltage LED Headlights\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLighted LED Cab Interior Light\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIlluminated LED Number Boards\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLighted LED Marker Lights\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e(2) Precision Flywheel-Equipped Motors\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOperating ProtoSmoke Diesel Exhaust\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOnboard DCC\/DCS Decoder\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLocomotive Speed Control In Scale MPH Increments\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1:48 Scale Proportions\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eProto-Sound 3.0 With The Digital Command System Featuring Quillable Horn With Freight Yard Proto-Effects\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUnit Measures: 15 3\/8” x 2 5\/8” x 4”\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOperates On O-36 Curves\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eDiesel DCC Features\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF0 Head\/Tail light\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF1 Bell\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF2 Horn\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF3 Start-up\/Shut-down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF4 PFA\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF5 Lights (except head\/tail)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF6 Master Volume\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF7 Front Coupler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF8 Rear Coupler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF9 Forward Signal\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF10 Reverse Signal\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF11 Grade Crossing\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF12 Smoke On\/Off\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF13 Smoke Volume\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF14 Idle Sequence 3\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF15 Idle Sequence 2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF16 Idle Sequence 1\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF17 Extended Start-up\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF18 Extended Shut-down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF19 Rev Up\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF20 Rev Down\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF21 One Shot Doppler\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF22 Coupler Slack\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF23 Coupler Close\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF24 Single Horn Blast\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF25 Engine Sounds\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF26 Brake Sounds\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF27 Cab Chatter\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eF28 Feature Reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003eIn 1958, GM's Electro-Motive Division took a great technological stride forward with the introduction of the turbocharged SD24. In turbocharged engines, exhaust gases are used to power a turbine that increases cylinder air pressure, thus effectively increasing horsepower. In fact, the 16-cylinder model 567 diesel that produced 1800 horsepower in the normally aspirated SD18 locomotive was upgraded to 2400 horsepower in the turbocharged SD24.\u003c\/p\u003e\n\u003cp\u003eTurbocharged engines also run better at varying altitudes, making them ideal for railroads that travel through changing terrain. Look on the left side of the SD24's hood for the semicircular bulge that marks the location of the turbine.\u003c\/p\u003e\n\u003cp\u003eThe SD24s were close relatives of the popular GP-series engines. The primary difference was that SD-series (for \"Special Duty\") locomotives were lengthened to make room for three-axle, three-motor trucks. For a GP and an SD engine of the same horsepower, the extra wheels on an SD locomotive gave it more tractive effort at low speeds and less engine weight on each axle. For this reason, the SD24 and others in the SD series were ideally suited for secondary lines with lighter rail.\u003c\/p\u003e"}

MTH 20-21722-1 - SD24 Diesel Engine "Santa Fe" #946 w/ PS3

$ 499.95 $ 559.95
Maximum quantity available reached.
Product Description
Announced Date: July 2022
Released Date: Est. Dec 2022
Individually Boxed: N/A
  • Road Name: Santa Fe
  • Road Number: 946
  • Product Line: Premier
  • Scale: O Scale
  • Estimated Release: Dec 2022
Features:
  • Intricately Detailed, Durable ABS Body
  • Die-Cast Truck Sides, Pilots and Fuel Tank
  • Metal Chassis
  • Metal Handrails and Horn
  • Moveable Roof Fans
  • Metal Body Side Grilles
  • Detachable Snow Plow
  • (2) Handpainted Engineer Cab Figures
  • Authentic Paint Scheme
  • Metal Wheels, Axles and Gears
  • (2) Remote-Controlled Proto-Couplers
  • Prototypical Rule 17 Lighting
  • Directionally Controlled Constant Voltage LED Headlights
  • Lighted LED Cab Interior Light
  • Illuminated LED Number Boards
  • Lighted LED Marker Lights
  • (2) Precision Flywheel-Equipped Motors
  • Operating ProtoSmoke Diesel Exhaust
  • Onboard DCC/DCS Decoder
  • Locomotive Speed Control In Scale MPH Increments
  • 1:48 Scale Proportions
  • Proto-Sound 3.0 With The Digital Command System Featuring Quillable Horn With Freight Yard Proto-Effects
  • Unit Measures: 15 3/8” x 2 5/8” x 4”
  • Operates On O-36 Curves 
Diesel DCC Features
  • F0 Head/Tail light
  • F1 Bell
  • F2 Horn
  • F3 Start-up/Shut-down
  • F4 PFA
  • F5 Lights (except head/tail)
  • F6 Master Volume
  • F7 Front Coupler
  • F8 Rear Coupler
  • F9 Forward Signal
  • F10 Reverse Signal
  • F11 Grade Crossing
  • F12 Smoke On/Off
  • F13 Smoke Volume
  • F14 Idle Sequence 3
  • F15 Idle Sequence 2
  • F16 Idle Sequence 1
  • F17 Extended Start-up
  • F18 Extended Shut-down
  • F19 Rev Up
  • F20 Rev Down
  • F21 One Shot Doppler
  • F22 Coupler Slack
  • F23 Coupler Close
  • F24 Single Horn Blast
  • F25 Engine Sounds
  • F26 Brake Sounds
  • F27 Cab Chatter
  • F28 Feature Reset
Overview:

In 1958, GM's Electro-Motive Division took a great technological stride forward with the introduction of the turbocharged SD24. In turbocharged engines, exhaust gases are used to power a turbine that increases cylinder air pressure, thus effectively increasing horsepower. In fact, the 16-cylinder model 567 diesel that produced 1800 horsepower in the normally aspirated SD18 locomotive was upgraded to 2400 horsepower in the turbocharged SD24.

Turbocharged engines also run better at varying altitudes, making them ideal for railroads that travel through changing terrain. Look on the left side of the SD24's hood for the semicircular bulge that marks the location of the turbine.

The SD24s were close relatives of the popular GP-series engines. The primary difference was that SD-series (for "Special Duty") locomotives were lengthened to make room for three-axle, three-motor trucks. For a GP and an SD engine of the same horsepower, the extra wheels on an SD locomotive gave it more tractive effort at low speeds and less engine weight on each axle. For this reason, the SD24 and others in the SD series were ideally suited for secondary lines with lighter rail.