Engine Data Sheets
Mechanical Data tables

Principal Aero Engines of 1910: Page 141 - Horizontal Engines
N/A = Not Applicable --- NA = Info Not available
Horizontal Engines Section 1
Maker Darracq Darracq Duthiel-Chambers Duthiel-Chambers Duthiel-Chambers Duthiel-Chambers Duthiel-Chambers
Cooling Water Water Water Water Water Water Water
No of Cyls 2 4 2 4 6 4 2 Opp. Piston
Bore/Stroke 5.12" x 4.73" 5.12" x 4.73" 5.04" x 5.12" 5.04" X 5.12" 5.04" X 5.12" 6.30" X 5.52" 4.33" X 11.80"
Ratio - Stroke to Bore 0.92 0.92 1.02 1.02 1.02 0.88 2.73
Operating rpm 1500 1500 1200 1200 1200 1200 1000
Piston Speed 1185 ft/min 1185 ft/min 1025 ft/min 1025 ft/min 1025 ft/min 1100 ft/min 985
Brake HP 24.20 48.40 24.20 48.40 72.60 75.80 37.60
Weight lbs 121 242 132 164 385 550 220
lbs per bhp 5.0 5.0 5.5 3.4 5.3 7.3 5.9
Horizontal Engines Section 2
Maker Duthiel-Chambers Duthiel-Chambers Duthiel-Chambers ---------------- ---------------- ---------------- ----------------
Cooling Water Water Water ---- ---- ---- ----
No of Cyls 3 Opp. Piston 4 Opp. Piston 3 Opp. Piston ---- ---- ---- ----
Bore/Stroke 4.33" x 11.80" 4.33" x 11.80" 4.93" x 11.80" ---- ---- ---- ----
Ratio - Stroke to Bore 2.73 2.73 2.40 ---- ---- ---- ----
Operating rpm 1000 1000 1000 ---- ---- ---- ----
Piston Speed 985 ft/min 985 ft/min 985 ft/min ---- ---- ---- ----
Brake HP 56.4 75.2 97 ---- ---- ---- ----
Weight lbs 396 528 792 ---- ---- ---- ----
lbs per bhp 7.0 7.0 8.2 ---- ---- ---- ----

Let me know if any of the above does not read true, or if you have information that does not agree.
Wherever possible, I will update these pages on a regular basis as data comes in.

• Main • Data Table Menu • Page 142 •

Principal Aero Engines of 1910: Page 141 - Horizontal Engines
N/A = Not Applicable --- NA = Info Not available
Horizontal Engines	Section 1
Maker	Darracq	Darracq	Duthiel-Chambers	Duthiel-Chambers	Duthiel-Chambers	Duthiel-Chambers	Duthiel-Chambers
Cooling	Water	Water	Water	Water	Water	Water	Water
No of Cyls	2	4	2	4	6	4	2 Opp. Piston
Bore/Stroke	5.12" x 4.73"	5.12" x 4.73"	5.04" x 5.12"	5.04" X 5.12"	5.04" X 5.12"	6.30" X 5.52"	4.33" X 11.80"
Ratio - Stroke to Bore	0.92	0.92	1.02	1.02	1.02	0.88	2.73
Operating rpm	1500	1500	1200	1200	1200	1200	1000
Piston Speed	1185 ft/min	1185 ft/min	1025 ft/min	1025 ft/min	1025 ft/min	1100 ft/min	985
Brake HP	24.20	48.40	24.20	48.40	72.60	75.80	37.60
Weight lbs	121	242	132	164	385	550	220
lbs per bhp	5.0	5.0	5.5	3.4	5.3	7.3	5.9
Horizontal Engines	Section 2
Maker	Duthiel-Chambers	Duthiel-Chambers	Duthiel-Chambers	----------------	----------------	----------------	----------------
Cooling	Water	Water	Water	----	----	----	----
No of Cyls	3 Opp. Piston	4 Opp. Piston	3 Opp. Piston	----	----	----	----
Bore/Stroke	4.33" x 11.80"	4.33" x 11.80"	4.93" x 11.80"	----	----	----	----
Ratio - Stroke to Bore	2.73	2.73	2.40	----	----	----	----
Operating rpm	1000	1000	1000	----	----	----	----
Piston Speed	985 ft/min	985 ft/min	985 ft/min	----	----	----	----
Brake HP	56.4	75.2	97	----	----	----	----
Weight lbs	396	528	792	----	----	----	----
lbs per bhp	7.0	7.0	8.2	----	----	----	----