Harpur 2-4-0

Harpur 2-4-0

Harpur 2-4-0 drawingsThe harpur 2-4-0 is an original design by Bob Harpur that Allen Models is now making available to builders for the first time.  Several copies of this model were built succesfully in the 1960s and we'd like to make it avialable to builders today who are looking for a model that will track well on the tighter curves of home railroads, or would like a more manageable model for transport.   The tank engine variation simplifies the concept even further by eliminating the need for a tender.

The engine has all the features that constitute a good functional working model. The 8" diameter drivers allow the engine to travel at a good rate of speed without using an excessive amount of steam. The boiler is made from a single 8 5/8" diameter steel tube with a minimum number of joints. The large firebox and grate area promotes free steaming, and the cylinder unit is separated into three pieces for easy machining. The smokebox splits on the centerline for accessibility to the internal fittings. This engine is being offered exclusively with a modern waterjet frame.

We recommend that the builder has a lathe of at least 12" swing and a vertical mill with at at least a 36" bed to complete this project.

Cabin Fever Sale!  Receive 10% off when ordering a complete 2-4-0 kit with all castings and drawings included.   Regularly $4,451.20, sale price is $4,010.20 plus freight.    Call us at 775-782-3800 to order your discounted kit today. Note: Includes waterjet frame and stock front pilot truck castings. Does not include optional tender kit. Offer expires February 28, 2019.

Specifications:

Scale: 1 1/2" (1/8 scale)        Drivers: 8"
Gauge: 7 1/2" or 7 1/4"   Boiler: 8 5/8"
Bore: 2"   Engine Length: 45"
Stroke: 3 1/4"   Tender: 33"
Valve Gear:  Stevenson   Weight: 380 lbs
      Minimum Radius:  30'

Brandon Ruiz and his Harpur 2-4-0 locomotive
seen at Los Angeles Live Steamers

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20 Item(s)

  1. HP 7-3 Harpur 2-4-0 Erection Drawings Only
    $30.00
    This drawing set includes three sheets, the side and front erection drawings only. This includes both the tank and the tender version. Sheet sizes range from 24X36 to 30X50 inches. Learn More
  2. H-35 Harpur 2-4-0 Complete Set of Drawings
    $150.00
    This is the complete set of drawings needed to build the harpur 2-4-0. A sample sheet thumbnail and a sample drawing detail of the crosshead is shown here. The drawings sheets range in size from 24" X 36" to 30" X 60" for some of the larger erection drawings depending on the locomotive. See below for a complete list of sheets included. Learn More
  3. H100-2 Pair of Waterjet Frames
    $280.00
    This waterjet frame replaces the built up bar stock frame kit for the Harpur 2-4-0. In addition to a great savings in fabrication labor and fastenings, this frame looks more prototypical and has the singular advantage of being able to drop the main axles without having to disassemble the frame. Comes with machining instructions. The hoops at the bottom of the as-waterjet item are to hold the frame's shape while the pedestal guide surfaces are machined. They are cut off and then the pedestal retainers / keepers installed. When not in stock, These frames are produced to order. Please call us at 775-782-3800 or email us at steve@allenmodels.com to place an order for this item. Learn More
  4. Harpur Section 01
    This section includes the main frame related parts including the frame spreader, draw bar pocket, yoke support and frame extensions. NOTE - M107-1 is only needed if building the bar stock frame. Learn More
  5. Harpur Section 02
    This section includes driver and spring rigging related parts for the Harpur 2-4-0. Learn More
  6. Harpur Section 03
    This section includes the brake rigging and brake cylinders for the Harpur 2-4-0. Learn More
  7. Harpur Section 04
    This section includes the side rods and main rods for the Harpur 2-4-0. Learn More
  8. Harpur Section 05
    This section includes the cross heads, yokes and bottom supports. Note that M154-1 has been replaced with a cast iron version; the aluminum version is still available below until inventory sells out. Learn More
  9. Harpur Section 06
    This section includes the cylinder related castings for the Harpur 2-4-0. Learn More
  10. harpur Section 07
    This section includes the blast pipe, saddle and pilot beam castings. Learn More
  11. Harpur Section 08
    This section includes valve gear eccentrics and related castings. Learn More
  12. Harpur Section 09
    This section includes the pilot truck related castings. Learn More
  13. Harpur Section 09A
    This section includes laser cut parts for the optional swing link lead truck. Learn More
  14. Harpur Section 09B
    This includes the castings for the optional swing link lead truck. Learn More
  15. Harpur Section 10
    This section includes the smokebox and related castings. NOTE - smoke box pieces, door and stack are now cast iron. Learn More
  16. Harpur Section 11
    This section includes the domes, reverse quadrant and cab floor support casting, cast cab pieces and running boards. NOTE - dome and quadrant castings are now cast iron. The old quadrant castings may still be ordered until they are out of stock. Learn More
  17. Harpur Section 12
    This section includes all the castings needed for the tender body. Learn More
  18. M230 30in Laser Cut Tender Kit
    $650.00
    This is a complete laser cut steel tender shell kit for the Allen Mogul and other Allen engines. This kit comes complete with all parts needed to assemble the shell, as well as a bag of 1,000 copper rivets, 12 clecos and a cleco clamping tool. This kit represents hundreds of hours of savings in fabrication time! A "must have" for any new tender builder. This is the "short" 30 inch tender, a "long" 36" tender intended for the ten wheeler and the consolidation is also available. Assembled photo is shown with M229B-1 tank fill hatch and M229A-1A top tank water fill lid. Learn More
  19. Harpur Section 13
    This section includes all the castings needed for the tender trucks. Learn More
  20. Harpur Section 14
    This section includes the throttle, couplers and fire door. Learn More

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20 Item(s)