Atlas-Imperial engines were considered one of the most serviceable diesels ever built in the United States. The company made diesels for tugboats, fishboats, coasters, yachts, lightvessels, and other ships. The company produced engines in a variety of sizes and ratings, from a 2-cylinder model that generated 30 horsepower (22 kW) to an 8-cylinder model that generated 600 horsepower (450 kW). Known for their reliability and serviceability, Atlas diesels were installed in workboats around the world. While the Atlas-Imperial factory closed in the 1950s, its engines continued to power vessels well into the era of high-speed, small-cylinder diesel technology. Today, a few hundred Atlas Imperial engines remain, with a few dozen still in operational condition.
The Canadian engines were assembled by Heaps Machine Shop in New Westminster, BC.
- Cummins, L. Diesel's Engine. Carnot. 1993.
- Information about Atlas-Imperial diesel engines on Old Tacoma Marine Inc
- Map of known remaining Atlas-Imperial diesel engines
- Video of operational 1929 Imperial engine
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