1942: Tatra started production of Tatra 111 with air-cooled V12 diesel engine. 1  1943â46: The common-rail (CRD) system was invented (and patented by) Clessie Cummins. 2  1944: Development of air cooling for diesel engines by KlÃ¶ckner Humboldt Deutz AG (KHD) for the production stage, and later also for Magirus Deutz.
Aaron (then age 39) hit 40 home runs in 392 at-bats, ending the 1973 season one home run short of the record. He hit home run number 713 on September 29, 1973, and with one day remaining in the season, many expected him to tie the record.
Besting Ruth, beating hate: How Hank Aaron made baseball history. Hank Aaron made sports history on April 8, 1974. On that day he broke Babe Ruth's total home run record -- something few thought could ever be done -- but swinging that bat came with a great personal risk. CNN takes a behind the scenes look at how this sports legend was made. By Jen Christensen, CNN.