D.— J

76

Table I.—Grade Ratings of Denver and Rio Grande Railway Locomotives from Actual Practice and with Ratings by Formula interlined, and Ratings by Formula for New Zealand Type B and Proposed 85-ton Engine.

The only material differences between the ratings by actual practice and the formula are in type 400, and in these the results by formula are on the safe side.

[Percent. Grade J Feet per Mile (1 in x — .. Level 0-5 0-8 10 1-5 00 26-4 42-3 52-8 792 lin 200 lin 125 lin 100 lin66-7 1-74 91-9 lin 57-5 2 0 105-6 1 in 50 2-4 1268 lin 41 7 2-7 142-6 lin 37 3-0 158-4 lin 333 3-125 165-0 lin 32 3-5 3-57 40 184-8 188-50 211-2 lin 28-6 lin 28 1 in 25 4-55 240-20 1 in 22 5-0 264-0 lin 20 . Resistance .. 6-58 17-77 24-51 2900 40-2 45-54 51-33 60-30 67-0 73-7 76-5 84-8 86-5 96-1 108-5 118-5 Remarks. Type. Total Tons. Weight on AdheDrivers. sion. I 100 200 300 400 I 91 110 129 134 I_ I 108,600 ! 24,420 122,200 j 27,500 166,400 37,430 164,425 37,000 (3,619 (3,254 (4,065 |3,417 (5,551 14,411 (5,486 (4,858 (4,092 "(3,598 ]5,622 "(5,077 (6,040 (5,192 1,284 1,279 1,438 1,294 1,979 1,861 1,946 2,058 1,444 1,399 1,997 1,994 2,102 2,037 905 919 1,010 949 1,398 1,338 1,376 1,484 1,024 999 1,412 1,434 1,485 1,464 752 767 838 790 1,161 1,118 1,141 1,242 838 832 1,173 1,199 1,233 1,224 517 532 574 543 803 776 786 867 572 572 812 835 852 851 278 409 385 397 426 401 600 579 586 651 422 422 607 625 637 636 238 353 313 324 336 325 492 477 479 537 342 351 498 512 522 521 241 248 264 244 379 362 368 412 259 258 385 393 403 400 140 209 197 202 214 196 313 296 302 340 209 207 316 324 331 328 163 175 176 160 261 240 251 278 170 168 265 267 276 269 98 150 163 190 "67 104 Formula. D. and R.G. Formula. D. and R.G. Formula. I D. and R.G. Formula. D. and R.G. Formula. D. and R.G. Formula. D. and R.G. Formula. D. and R.G. New Zealand. New Zealand. 500 107 123,300 27,750 600 128 168,000 37,800 700 138 177,000 39,800 B 35-ton 65 85 70,112 15,790 100,000 22,500 187 251 118 177 80 122 I