. "* de Havilland Aircraft Heritage Centre"@en . . . . . . . . "6"^^ . . "*List of aircraft engines"@en . . "250.0"^^ . . . "45"^^ . . . . . . . "Lumsden and Flight"@en . . . . "1909"^^ . . . . . . . . . "1018267344"^^ . . . . . . . . . . . . . "De Havilland Iris"@en . "The de Havilland Iris was a British four-cylinder, liquid-cooled, horizontally opposed aero engine. Notable as the first aero engine to be designed by Geoffrey de Havilland it was produced in small numbers between 1909 and 1910 by Iris Cars Ltd of Willesden from which it took its name."@en . . . . . . . . "Water-cooled, thermo-siphon system"@en . "27644835"^^ . . . "6621"^^ . . . . . "4.75"^^ . . . . "4"^^ . . "0.15"^^ . "250.0"^^ . . . . . "4.5"^^ . "The de Havilland Iris was a British four-cylinder, liquid-cooled, horizontally opposed aero engine. Notable as the first aero engine to be designed by Geoffrey de Havilland it was produced in small numbers between 1909 and 1910 by Iris Cars Ltd of Willesden from which it took its name."@en . . . . . . "*Green C.4"@en . . "Overhead valve"@en . . . . . . . . "0.18"^^ . . "301.46"^^ . . . . . . . . . . . . . . . . .