Ronaldson-Tippett Engine Numbers Dating List

Note: These numbers are the LAST engine tested in that month. (Corrected and updated,August 2012)

 ***********************************************************
      1911   1912   1913   1914   1915   1916   1917    1918
                                                              
JAN   595    817    1010   1206   1378   1521   1716    1930    
FEB   613    842    1025   1211   1388   1534   1729    1946  
MAR   636    860    1040   1241   1397   1551   1754    1946  
APR   649    869    1055   1253   1409   1566   1764    1985
MAY   664    891    1070   1275   1414   1579   1788    2007
JUN   689    902    1084   1288   1430   1596   1808    2061  
JUL   709    914    1101   1301   1441   1614   1828    2042
AUG   720    919    1120   1321   1453   1629   1845    2070
SEPT  737    950    1141   1333   1465   1648   1864    2098
OCT   773    965    1160   1344   1477   1665   1885    2118
NOV   790    980    1180   1354   1496   1684   1902    2159
DEC   806    995    1197   1364   1512   1697   1918    2177 
************************************************************
      1919   1920   1921   1922   1923   1924   1925    1926

JAN   2208   2650   3331   3910   4418   4967   5275    5862
FEB   2242   2684   3400   3944   4486   5001   5309    5880
MAR   2276   2719   3435   3978   4554   5035   5343    5862
APR   2310   2753   3502   4012   4581   5052   5377    5960
MAY   2344   2820   3570   4046   4656   5069   5411    6022
JUN   2378   2888   3604   4080   4725   5087   5448    6056
JUL   2412   2922   3638   4114   4760   5104   5490    6565
AUG   2446   3024   3672   4180   4795   5121   5553    6107 
SEPT  2480   3093   3740   4214   4760   5138   5599    6124
OCT   2514   3194   3775   4282   4863   5172   5793    6158
NOV   2548   3229   3809   4350   4897   5206   5810    6192
DEC   2582   3263   3876   4384   4933   5241   5827    6300
************************************************************
      1927   1928   1929   1930   1931   1932   1933    1934

JAN   6332   7162   7657   8118   8383   8516   8797    9144
FEB   6364   7196   7690   8151   8394   8549   8813    9177
MAR   6398   7229   7756   8178   8405   8560   8846    9210
APR   6432   7278   7789   8205   8416   8571   8879    9276
MAY   6499   7327   7854   8231   8427   8582   8896    9309
JUN   6532   7376   7887   8257   8438   8599   8912    9342
JUL   6565   7425   7903   8316   8449   8615   8929    9408
AUG   6898   7458   7920   8316   8460   8648   8945    9441
SEPT  6964   7491   7986   8349   8471   8665   8978    9507
OCT   6997   7558   8019   8482   8482   8681   9044    9573
NOV   7063   7591   8052   8493   8493   8747   9078    9639
DEC   7095   7624   8083   8375   8504   8780   9111    9672
************************************************************
      1935   1936   1937   1938   1939   1940   1941    1942

JAN   9771  10333   11288  12743  14600  16341   
FEB   9804  10432   11354  12909  14785  16341 
MAR   9837  10498   11435  13074  14934  16785 
APR   9870  10584   11581  13239  15045  16970 
MAY   9936  10663   11584  13403  15193  17191 
JUN   9969  10762   11649  13566  15304  *****
JUL  10002  10828   11748  13731  15452         
AUG  10036  10891   12046  13896  15563                
SEPT 10068  10992   12178  14061  15638 
OCT  10134  11091   12310  14235  15823 
NOV  10201  11157   12478  14346  15971             
DEC  10267  11223   12611  14526  16156          21400   24700


   Note: These numbers are the LAST engine tested in that month. 
Some months are unknown so an average has been calculated for that month (shown in italics).

   Note: For the years below the engine numbers are for the last engine produced in that year
1943: 25195
1944: 29027
1945: 32844
1946: 41843
1947: 45920
1948: 49937
1949: 54208
1950: 58547
1951: 63002
1952: 67587
1953: 71340
1954: 74967
1955: *****
1956: 83393
1957: 87666
1958: *****
1959: *****
1960: 101253
1961: 105507
1962: 109105
1963: 112624
1964: 117227
1965: 121333
1966: 124090
1967: 127436
1968: ******
1969: 130791
1970: 137032

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