The Nubian featured the twin overhead camshafts and four valves of his prewar engines for Grand Prix and TT racing cars.
[1] The original engine was built with a 60-degree angle between cylinder banks, but severe vibration problems forced Coatalen to redesign it with a 90-degree angle, emerging as the Nubian II.
The only aircraft known to have been powered by a Nubian was the Saunders T.1, but some of the 36 engines built, of 50 ordered, are believed to have been supplied to the Imperial Russian Air Service.
[1] The Nubian suffered from a poor design decision at first and was overtaken by events which prevented widespread use, but its cousin, the V-12 Sunbeam Afridi and its family members found greater success.
[1] Data from Sunbeam Aero-Engines[1] Comparable engines Related lists