All seven of these locomotives had 63" diameter drivers, 26" x 30" cylinders and with a 200 psi boiler pressure they exerted 54,725 pounds of tractive effort and each weighed about 325,000 pounds.
The AC&Y leased a 2-8-2 from the Nickel Plate in December 1944 and returned it in May1945. This was NKP number 602. ACY also bought four second hand 2-8-2s from the Nickel Plate. These four locomotives were former NKP number 607 which was bought in 1945, number 616 and number 601 bought in 1946 and number 604 which was bought in 1947.
There are no surviving ACY 2-8-2 "Mikado" type locomotives.
|Class||Qty.||Road Numbers||Year Built||Builder||From Other RR||Year. Acquired||Notes|
|R||2||400-401||1926||Lima||1926||Number 400 scrapped in 1948. Number 401scrapped in 1946.|
|R-1||2||402-403||1928||Lima||1928||Numbers 402 and 403 scrapped in 1955.|
|R-2||2||404-405||1941||Lima||1941||Numbers 404 and 405 scrapped in 1954.|
|R-2||1||406||1944||Lima||1944||Number 406 scrapped in 1954.|
|H-6a||1||NKP #602||1918||ALCO||NKP # 602||Dec.1944||NKP 602 leased to the ACY in December 1944 and returned to the NKP in May 1945.|
|H-6a||1||407||1918||ALCO||NKP # 607||Dec.1945||Number 407 bought from the NKP in December 1945. Ex NKP number 607 scrapped in 1948.|
|H-6c||1||408||1921||Lima||NKP # 616||Oct. 1946||Number 408 bought from the NKP in October 1946. Ex NKP number 616 scrapped in 1950.|
|H-6a||1||409||1918||ALCO||NKP # 601||Nov.1946||Number 409 bought from the NKP in November 1946. Ex NKP number 601 scrapped in 1949.|
|H-6a||1||410||1918||ALCO||NKP # 604||Jan. 1947||Number 410 bought from the NKP in January 1947. Ex NKP number 604 scrapped in 1949.|
Similar to USRA Light Mikado design and virtually identical to C&IM F-4 class (Locobase 8). Firebox heating surface in the R class included 80 sq ft (7.4 sq m) of thermic syphons. The boiler had a feed water heater. R-1 and R-2 are shown in the AC&Y diagrams with two arch tubes and two syphons that measured 80 sq ft and 85 sq ft (7.9 sq m), respectively.
Chris Hohl alerted Locobase to the presence of tender boosters, as noted above. Further research took Locobase to a Classic Trains forum discussion of third-cylinder booster installations.
"ACY" responded on 12 September 2013 at http://cs.trains.com/ctr/f/3/t/220574.aspx (last accessed 20 August 2015) with a succinct summary of the AC&Y's use of tender boosters. After noting that single-axle trailing trucks had to be cast (e.g. Delta) rather than built-up like Cole and Hodges, he wrote: "On the Akron Canton & Youngstown, Mikados 400 and 401 were delivered with Hodges trailing trucks and Franklin tender boosters. After that, no's 402 and 403 were delivered with cast Delta trailing trucks and Franklin tender boosters to match those on the earlier engines, presumably to simplify the road's parts inventory. In any case, the boosters were all removed from the AC&Y engines in the early 1940's."
A look at later diagram books show that the later R-2s never used tender boosters.
"Ohio's Road of Service" built this class over a surprisingly long time. After taking two in 1926, the railroad received two more in 1928 as class R-1; these put 223,300 lb (101,287 kg) on the drivers and had a total engine weight of 313,800 lb (142,387 kg). Thirteen years later Lima delivered two more as Class R-2 (319,800 lb/145,059 kg) with one more coming in 1944.
The first two were scrapped in 1948 & 1946, respectively. The others carried on until the 1950s.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Akron, Canton, & Youngstown|
|Number in Class||7|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||16.75 / 5.11|
|Engine Wheelbase (ft / m)||36.08 / 11|
|Ratio of driving wheelbase to overall engine wheebase||0.46|
|Overall Wheelbase (engine & tender) (ft / m)||70.87 / 21.60|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||218,000 / 98,883|
|Engine Weight (lbs / kg)||303,500 / 137,665|
|Tender Loaded Weight (lbs / kg)||182,200 / 82,645|
|Total Engine and Tender Weight (lbs / kg)||485,700 / 220,310|
|Tender Water Capacity (gals / ML)||9500 / 35.98|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||12 / 10.90|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||91 / 45.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||63 / 1600|
|Boiler Pressure (psi / kPa)||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||26" x 30" / 660x762|
|Tractive Effort (lbs / kg)||54,724 / 24822.42|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.98|
|Firebox Area (sq ft / m2)||338.30 / 31.43|
|Grate Area (sq ft / m2)||66.70 / 6.20|
|Evaporative Heating Surface (sq ft / m2)||3502 / 325.46|
|Superheating Surface (sq ft / m2)||940 / 87.36|
|Combined Heating Surface (sq ft / m2)||4442 / 412.82|
|Evaporative Heating Surface/Cylinder Volume||189.96|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||13,340|
|Same as above plus superheater percentage||16,141|
|Same as above but substitute firebox area for grate area||81,869|