Comments by "David Elliott" (@davidelliott5843) on "The Legendary Napier Deltic - 88 Litre Opposed 2-Stroke Triangle Engine" video.

  1. Deltic railway locos are still in use pulling freight on the U.K. west coast main line.
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  2. A single or twin row Deltic would be an excellent car or truck engine. With a petrol injector on one side and a spark plug on the other you’ll get an extremely clean DI two stroke. In diesel form, reduce the port heights for less noise and more torque.
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  3. Early large two strokes had sleeve valves. These were not needed as the Deltic or indeed it’s Junkers forerunner proved.
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  4. Deltic railway locomotives were powerful and fuel efficient. There is at least one Deltic loco still in use for freight hauling. Used as intended, they were very reliable. Then British Rail with its collective intelligence decided it was cheaper to service and rebuild the engines in their own workshops. No worries? Except these were the steam engine sheds with all their associated dust and grime. Unsurprisingly reliability collapsed.
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  5. Crecy with its (unnecessary) sleeve valves and diesel fuel pumps was not a simple engine. It also had an inadequate oil pump which led to endless con-rod failures.
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