Technical Info 2 1/2" Scale Heisler
As of May 1991
Basic Details
Max. Length over couplers ------------------------------------------------ 88"
Max Drive wheel centers --------------------------------------------- 62 1/2"
Width Front & Rear beams ----------------------------------------------- 21"
Max Width over cylinders ------------------------------------------------- 24"
Max Height over safety valves ------------------------------------------- 29"
Driving wheel Dia. ------------------------------------------------------ 7 1/2"
Track gauge ------------------------------------------------------------- 7 1/2"
Weight - Empty ---------------------------------------------------------- 840#
Operating Weight w/ 195# Engineer ---------------------------------1160#
Cylinder bore Dia. ------------------------------------------------------ 2 1/4"
Piston stroke ------------------------------------------------------------ 2 1/2"
Slide valve travel - Max. ------------------------------------------------- 5/8"
Vavle gear lap ----------------------------------------------------------- 7/64"
Valve gear lead ----------------------------------------------------------- 0.0"
Steam ports ------------------------------------- 13/64" wide X 1 5/8" wide
Exhaust ports ------------------------------------- 7/16" wide X 1 5/8" wide
Cut-off ---------------------------------------------------------------- 87 1/2%
Steam lines ------------------------------------- 5/8"-20Ga. inside Dia. .55"
Exhaust lines ----------------------------------- 7/8"-18Ga. inside Dia. .78"
Gear ratio ------------------------------------------------------------------- 2:1
Engine RPM @ 7 1/2 MPH ------------------------------------------------- 675
Tractive effort @ 80% boiler pressure --------------------------------- 330#
Boiler material ------------------------------------------------------------ Steel
Fuel --------------------------------------------------------------------- Propane
Propane capacity -------------------------------------------- 40 lbs liquid gas
Water tank capacity on locomotive ----------------------------------- 9 Gals.
Tolal water capacity with fuel car ------------------------------------ 29 Gals.
Cylinder drain cocks operation ---------------------------------------- Manual
Locomotive brakes ------------------------------------------------------- Steam
Train brakes ------------------------------------------ Steam ejector- Vacuum
Boiler Feed -------------------------------------------- Injector & steam pump
Locomotive parking brake ---------------------------------------------- Manual
Minimum track radius -------------------------------------------------------- 15'
Boiler capacity @ 1/2 gauge glass level ------------------------- 5 3/4 Gals.
Boiler tubes --------------- Copper-5/8" OD X 9/16" ID, No.-33, Length 22"
Operating boiler pressure ------------------------------------------- 130# Max
Blast nozzle Dia. ---------------------------------------------------------- 5/16"
Max axle loading------------------------- Rear truck w/ 195# engineer-340#