Athearn Genesis 22683 Frisco FP7A/F7B DCC/Sound #40A/135B HO

Athearn Genesis

MSRP: $519.98
Was: $359.00
Now: $319.00
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5.00 LBS
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Detailed Information


Amtrak Road Specific Details:
  • #111 
    • Nathan M5 air horn
  • #113A/#161B 
    • Nathan M5 air horn
  • #116A/#163B 
    • Nathan P3 air horn
  • All Amtrak units feature: 
    • SP style "pyle triple" upper signal light
    • SP style plow pilot
    • Steam generator
    • Side skirts as per prototype
    • Cab sunshades
    • Mirrors
    • Nose m/u door
    • Nose/rear lift lugs 
    • Icicle breakers rearward mount
Frisco Road Specific Details:
  • #43 
    • Non dynamic brake
    • Truck journals as per prototype
  • #40A/#135B 
    • FP7A and F7B
    • Both units non dynamic brakes
  • #50A/#145B 
    • FP7A and F9B
    • FP7A non dynamic brakes
    • F9B dynamic brakes
  • All Frisco units feature: 
    • Painted/lettered for 1968 renumbering
    • Steam generator in a-units
    • Side skirt as per prototype
NdeM Road Specific Details:
  • #6301 
    • FP7A
    • Nose mounted number plate
  • #6329A/#7010A 
    • FP7A/FP9A
    • Nose mounted number plate FP7A
  • #7016A/#6213B 
    • FP9A/F2B
    • High radiator fans F2B
  • All NdeM units feature: 
    • Dynamic brakes
    • Roof mount cooling coil on FP9s
    • Steam generator
Southern Pacific Road Specific Details:
  • #6455 
    • SP style "pyle triple" upper signal light
    • Icicle breakers rearward mount
    • Nathan M5 air horn
  • #6450A/#544B 
    • SP style "pyle triple" upper signal light
    • Icicle breakers rearward mount a-unit
    • Nathan M5 air horn
  • #6457A/#8298B 
    • SP style "post" signal light
    • Icicle breakers forward mount a-unit
    • Nathan M3 air horn
  • All Southern Pacific units feature: 
    • SP style plow pilot
    • Steam generator
    • Side skirts as per prototype
    • Cab sunshades
    • Mirrors
    • Nose m/u door
    • Nose/rear lift lugs 
    • Blank number boards w/decals for train numbers


  • All units are powered
  • Researched from the prototype to match specific units
  • All units are powered
  • Genesis driveline with dynamically balanced five pole skew wound motor and dual flywheels
  • Directional constant lighting
  • Separately applied photo etched metal and injection molded detail parts
  • Cab interior
Sound equipped models also feature:
  • Factory installed SoundTraxx Tsunami sound and DCC decoder
  • Tsunami sounds are compatible with both DCC and DC operation
  • DCC Quick-Plug equipped


The EMD FP7 was a 1,500 horsepower (1,100 kW), B-B dual-service passenger and freight-hauling diesel locomotive produced between June 1949 and December 1953 by General Motors' Electro-Motive Division and General Motors Diesel. Final assembly was at GM-EMD's La Grange, Illinois plant, excepting locomotives destined for Canada, in which case final assembly was at GMD's plant in London, Ontario. The FP7 was essentially EMD's F7A locomotive extended by four feet to give greater water capacity for the steam generator for heating passenger trains.

While EMD's E-units were successful passenger engines, their A1A-A1A wheel arrangement made them less useful in mountainous terrain. Several railroads had tried EMD's F3 in passenger service, but there was insufficient water capacity in an A-unit fitted with dynamic brakes. The Atchison, Topeka and Santa Fe Railway's solution was to replace the steam generators in A-units with a water tank, and so only fitted steam generators into the B-units. The Northern Pacific Railway's solution was to fit extra water tanks into the first baggage car, and to pipe the water to the engines. The real breakthrough came when EMD recognized the problem and added the stretched FP7 to its catalog.

A total of 381 cab-equipped lead A units were built; unlike the freight series, no cabless booster B units were sold. Regular F7B units were sometimes used with FP7 A units, since they, lacking cabs, had more room for water and steam generators. The FP7 and its successor, the FP9, were offshoots of GM-EMD's highly successful F-unit series of cab unit freight diesels.

F3s, F7s, and F9s equipped for passenger service are not FP-series locomotives, which although similar in appearance have distinctive differences, including but not limited to the greater body length. The extra 4 ft (1.2 m) of length was added behind the first body-side porthole, and can be recognised by the greater distance between that porthole and the first small carbody filter grille. The corresponding space beneath the body, behind the front truck, was also opened up; this either remained an empty space or was filled with a distinctive water tank shaped like a barrel mounted transversely.


DCC: Ready
COUPLER STYLE: McHenry Scale Knuckle
Minimum Age Recommendation: 14 years
Is Assembly Required: No