I suppose most people go to Pebble Beach to look at the Bugattis and the Duesenbergs, but as usual, it's the esoterica that delights me. This is the Howmet TX, an experimental racing car from 1968 that's powered by a jet turbine engine. [credit: Jonathan Gitlin ] CARMEL, CALIF.—Last Sunday, the 69th Pebble Beach Concours d'Elegance took place by the Pacific at the Pebble Beach Golf Course.