Dutheil et Chalmers were an important early French aircraft engine manufacturer. A contemporary reference is the 1920 book by E. Charles Vivian (ECV) in which a chapter covers horizontally-opposed aircraft engines. The Dutheil et Chalmers engines are described as notable engines among several HOAE from various countries. Vivian's book is available on the Internet and can be found here. Another reference is Setright's book (LJKS).
N/A -- {N/A / N/A / N/A} / {N/A / N/A / N/A}
2cyl; N/A; 8hp@N/A rpm; 1908-1909; Wt = 25#.
Engine used by Matthew B. Sellers, Jr. in the US for his very light-weight (110#) quadruplane.
aerofiles.com.
Applications: (US) Sellers Quadruplane (No.6).
O-150 -- {4.921 / 3.937 / 149.8} / {125 / 100 / 2454}
Same bore as OL-180, OL-360, OL-540, OL-900.
2cyl; N/A; 18-20hp@N/A rpm; 1907-1909; Wt = 51#.
Engine used by Alberto Santos-Dumont of Brazil in his initial Demoiselle flights in France during 1907-1908.
Ae39; G&T; LEO.
Applications: (France) Santos-Dumont XIX Demoiselle (Libellule). (UK) Watson biplane #1.
OL-180 -- {4.921 / 4.724 / 179.7} / {125 / 120 / 2945}
Same bore and stroke as OL-360, OL-540.
Same bore as O-150, OL-900.
2cyl; N/A; 20hp@1200rpm; 1910-1912; Wt = 165#.
Liquid-cooled engine.
Ae39; G&T; J1912; LEO; LJKS.
Applications: (France) Santos-Dumont XX Demoiselle (Bébé, JouJou). (UK) Windham biplane #1 (built to order by de Pischoff and Koechlin in France; modified by Windham).
OL-350 -- {4.331 / 11.811 / 348.0} / {110 / 300 / 5702}
Same bore and stroke as OL-695.
Same stroke as OL-900.
2cyl; N/A; 37hp@1000rpm; 1910; Wt = 200-220#.
Liquid-cooled engine.
Ae39; LEO; LJKS.
Applications: (France) Avia #4; Blériot XI.
OL-360 -- {4.921 / 4.724 / 359.5} / {125 / 120 / 5890}
Same bore and stroke as OL-180, OL-540.
Same bore as O-150, OL-900.
4cyl; N/A; 40hp@1200rpm; 1910-1912; Wt = 264#.
Liquid-cooled engine.
Ae39; G&T; J1912; LEO; LJKS.
Applications: (France) Bonnett-Labranche No. 4; Dutheil et Chalmers Farman-type biplane. (UK) Windham biplane #1 (built to order by de Pischoff and Koechlin in France; modified by Windham).
OL-540 -- {4.921 / 4.724 / 539.2} / {125 / 120 / 8836}
Same bore and stroke as OL-180, OL-360.
Same bore as O-150, OL-900.
6cyl; N/A; 60hp@N/A rpm; 1910-1912; Wt = 374#.
Liquid-cooled engine.
Ae39; J1912.
Applications: None found.
OL-615 -- {5.039 / 5.118 / 612.5} / {128 / 130 / 10,037}
6cyl; N/A; 72hp@1200rpm; 1910; Wt = 385#.
Liquid-cooled engine.
Ae39; LJKS.
Applications: None found.
OL-685 -- {6.299 / 5.512 / 687.1} / {160 / 140 / 11,259}
4cyl; N/A; 100hp@1200rpm; 1910; Wt = 638#.
Liquid-cooled engine.
Ae39; LJKS.
Applications: None found.
OL-695 -- {4.331 / 11.811 / 695.9} / {110 / 300 / 11,404}
Same bore and stroke as OL-350.
Same stroke as OL-900.
4cyl; N/A; 75hp@1000rpm; 1910; Wt = 528#.
Liquid-cooled engine.
Ae39; LJKS.
Applications: None found.
OL-900 -- {4.921 / 11.811 / 898.7} / {125 / 300 / 14,726}
Same bore as O-150, OL-180, OL-360, OL-540.
Same stroke as OL-350, OL-695.
4cyl; N/A; 97hp@1000rpm; 1910; Wt = 792#.
Liquid-cooled engine.
Ae39; LJKS.
Applications: None found.