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D&RGW 2-6-6-2

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D&RGW 2-6-6-2
Posted by IA and eastern on Sunday, May 22, 2022 11:31 PM

In WW1 Loree proposed seven 2-6-6-2s for the Marshall pass line and in 1920 the trustee proposed 2-6-6-2s with 44" drivers and 45,000 te but the board turned down both ideals. Are there any drawings or data on either of these proposals? Gary

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Posted by pennytrains on Monday, May 23, 2022 6:24 PM

Have you tried the Denver and Rio Grande Western Historical Society?

 https://www.drgw.net/

 

Big Smile  Same me, different spelling!  Big Smile

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Posted by mudchicken on Tuesday, May 24, 2022 10:19 AM

Sounds like a research request for the Colorado Railroad Museum Richardson Library. Robert W. Richardson Railroad Library and Collections - Colorado Railroad Museum

From all of Bob LaMassena's work and files, the DRGW archives and the tons of institutional knowledge of the DRGW retirees - I bet John Tudek and company would be able to find an answer to your question.

Mudchicken Nothing is worth taking the risk of losing a life over. Come home tonight in the same condition that you left home this morning in. Safety begins with ME.... cinscocom-west
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Posted by BEAUSABRE on Tuesday, May 24, 2022 8:53 PM

They might well have resembled NdeM's 3 foot gauge Class HR-01 2-6-6-2's of the late 20's. They were modern articulateds - simple rather than compound, front end throttle, outside bearing leading truck. The roller skate sized wheels on the rear truck are probably because they are not there to support a big firebox, but guide the locomotive on reverse moves. Later they got Elesco feed water heaters, which, coupled with their smoke box front air compressors led Robert LeMassena to comment that they looked like what the C&O would have had if it had a narrow  gauge division. 

"The ultimate in North American narrow-gauge steam power was a group of 10 simple-expansion 2-6-6-2s built by Alco for NdeM during 1929–37. In March 1948, No. 369 backs onto a passenger train at Mexico City’s Buenavista Station."

(2) Pinterest

Principal Dimensions by Steve Llanso of Sweat House Media
ClassHR-01HR-2HR-3HR-4
Locobase ID 4430  5715  11061  3167 
Railroad Nacional de Mexico (NdeM) Central Mexicano (NdeM) Internacional Mexicano (NdeM) Nacional de Mexico (NdeM)
Country Mexico Mexico Mexico Mexico
Whyte 2-6-6-2 2-6-6-2 2-6-6-2 2-6-6-2
Number in Class 10 1 20 8
Road Numbers 361-370 200 / 600 / 1100 / 2003 1101-1120/2004-2022 2030-2037
Gauge 3' Std Std Std
Number Built 10 1 20 8
Builder Alco-Schenectady Burnham, Williams & Co Baldwin Alco-Schenectady
Year 1928 1908 1910 1937
Valve Gear Baker Walschaert Walschaert Walschaert
 Locomotive Length and Weight
Driver Wheelbase (ft / m) 16 / 4.88 18.67 / 5.69 21.34 / 6.50 21 / 6.40
Engine Wheelbase (ft / m) 37.50 / 11.43 44.17 / 13.46 46 / 14.02 49.58 / 15.11
Ratio of driving wheelbase to overall engine wheelbase 0.43 0.42 0.46 0.42
Overall Wheelbase (engine & tender) (ft / m) 64.50 / 19.66 70.92 / 21.62 79.21 / 24.14  
Axle Loading (Maximum Weight per Axle) (lbs / kg) 28,672 / 13,005      
Weight on Drivers (lbs / kg) 161,500 / 73,255 300,000 / 136,078 298,200 / 135,261 322,560 / 146,311
Engine Weight (lbs / kg) 204,000 / 92,533 338,000 / 153,314 338,500 / 153,541 400,960 / 181,873
Tender Loaded Weight (lbs / kg) 104,800 / 47,537 157,000 / 71,214 165,500 / 75,070 193,000 / 87,543
Total Engine and Tender Weight (lbs / kg) 308,800 / 140,070 495,000 / 224,528 504,000 / 228,611 593,960 / 269,416
Tender Water Capacity (gals / ML) 4500 / 17.05 9000 / 34.09 9000 / 34.09  
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2500 / 9463 3500 / 13,248 4000 / 15,140  
Minimum weight of rail (calculated) (lb/yd / kg/m) 45 / 22.50 83 / 41.50 83 / 41.50 90 / 45
 Geometry Relating to Tractive Effort
Driver Diameter (in / mm) 43 / 1092 55 / 1397 56 / 1422 57 / 1448
Boiler Pressure (psi / kPa) 210 / 14.50 200 / 13.80 220 / 15.20 250 / 17.20
High Pressure Cylinders (dia x stroke) (in / mm) 15" x 22" / 381x559 (4) 21.5" x 32" / 546x813 21.5" x 32" / 546x813 18" x 30" / 457x762 (4)
Low Pressure Cylinders (dia x stroke) (in / mm)   33" x 32" / 838x813 33" x 32" / 838x813  
Tractive Effort (lbs / kg) 41,097 / 18641.31 64,193 / 29117.49 69,352 / 31457.58 72,474 / 32873.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.93 4.67 4.30 4.45
 Heating Ability
Tubes (number - dia) (in / mm) 123 - 2.25" / 57 350 - 2.25" / 57 365 - 2.25" / 57 164 - 2.25" / 57
Flues (number - dia) (in / mm) 28 - 5.5" / 140     40 - 5.5" / 140
Flue/Tube length (ft / m) 20 / 6.10 21 / 6.40 21 / 6.40 22 / 6.71
Firebox Area (sq ft / m2) 204 / 18.95 201 / 18.67 207 / 19.23 423 / 39.30
Grate Area (sq ft / m2) 52.50 / 4.88 61 / 5.67 67 / 6.23 70.30 / 6.53
Evaporative Heating Surface (sq ft / m2) 2449 / 227.60 4512 / 419.33 4701 / 436.90 3801 / 353.25
Superheating Surface (sq ft / m2) 680 / 63.20     1080 / 100.37
Combined Heating Surface (sq ft / m2) 3129 / 290.80 4512 / 419.33 4701 / 436.90 4881 / 453.62
Evaporative Heating Surface/Cylinder Volume 272.11 335.66 349.72 215.11

 

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Posted by kgbw49 on Thursday, May 26, 2022 8:39 PM

BEAUSABRE, you are definitely on to something there! To borrow a phrase from the Guinness commercials, "Brilliant!"

Those NG 2-6-6-2s look like a "Mini Me"  version of the standard gauge L-131 and L-132 2-8-8-2s.

 

https://digital.denverlibrary.org/digital/collection/p15330coll22/id/49326/

https://www.trains.com/ctr/photos-videos/photo-of-the-day/rio-grande-2-8-8-2-on-tennessee-pass/

 

 

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