Engine Data Sheets
Mechanical Data tables

Principal Aero Engines of 1910 Page 145
N/A = Not Applicable --- NA = Info Not available
Vertical Engines Section 1
Maker Aster Bates Clement Clement Clement Darracq Darracq
Cooling Water Water Water Water Water Water Water
No of Cyls 4 4 6 4 4 4 4
Bore/Stroke 5.12" x 5.52" 3.98" x 3.98" 6.10" x 7.28" 7.48" x 9.06" 3.94" x 4.73" 4.73" X 5.52" 6.7" X 5.52"
Ratio - Stroke to Bore 1.08 1 1.19 1.21 1.2 1.17 0.82
Operating rpm 1000 Not Given Not Given Not Given Not Given 1500 1200
Piston Speed 925 ft/min Not Given Not Given Not Given Not GIven 1380 ft/min 1100 ft/min
Brake HP 51 28.8 117.5 118.5 29 43.1 84
Weight lbs 242 116 880 1100 213 374 550
lbs per bhp 4.75 4.0 7.5 9.3 7.35 8.7 6.55
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Vertical Engines Section 2
Maker Green Green Green Grégoire Grégoire Métallurgique Métallurgique
Cooling Water Water Water Water Water Water Water
No of Cyls 4 4 8 4 4 4 4
Bore/Stroke 4.13" x 4.73" 5.52" x 5.75" 4.57" x 5.52" 3.62" x 5.52" 5.12" x 5.52" 3.94" X 5.91" 4.92" X 5.98"
Ratio - Stroke to Bore 1.14 1.04 1.21 1.5 1.08 1.5 1.2
Operating rpm 1200 1100 1100 1500 1000 1850 1600
Piston Speed 950 ft/min 1015 ft/min 1010 ft/min 1380 ft/min 920 ft/min 1820 ft/min 1600 ft/min
Brake HP 32 60 82 26.1 51 32 48.5
Weight lbs 160 236 Not Given 174 242 300 550
lbs per bhp 5 3.94 Not Given 6.6 4.7 9.4 11.3
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Principal Aero Engines of 1910 Page 145
N/A = Not Applicable --- NA = Info Not available
Vertical Engines	Section 1
Maker	Aster	Bates	Clement	Clement	Clement	Darracq	Darracq
Cooling	Water	Water	Water	Water	Water	Water	Water
No of Cyls	4	4	6	4	4	4	4
Bore/Stroke	5.12" x 5.52"	3.98" x 3.98"	6.10" x 7.28"	7.48" x 9.06"	3.94" x 4.73"	4.73" X 5.52"	6.7" X 5.52"
Ratio - Stroke to Bore	1.08	1	1.19	1.21	1.2	1.17	0.82
Operating rpm	1000	Not Given	Not Given	Not Given	Not Given	1500	1200
Piston Speed	925 ft/min	Not Given	Not Given	Not Given	Not GIven	1380 ft/min	1100 ft/min
Brake HP	51	28.8	117.5	118.5	29	43.1	84
Weight lbs	242	116	880	1100	213	374	550
lbs per bhp	4.75	4.0	7.5	9.3	7.35	8.7	6.55
-----------------	-----------------	-----------------	-----------------	-----------------	-----------------	-----------------	-----------------
Vertical Engines	Section 2
Maker	Green	Green	Green	Grégoire	Grégoire	Métallurgique	Métallurgique
Cooling	Water	Water	Water	Water	Water	Water	Water
No of Cyls	4	4	8	4	4	4	4
Bore/Stroke	4.13" x 4.73"	5.52" x 5.75"	4.57" x 5.52"	3.62" x 5.52"	5.12" x 5.52"	3.94" X 5.91"	4.92" X 5.98"
Ratio - Stroke to Bore	1.14	1.04	1.21	1.5	1.08	1.5	1.2
Operating rpm	1200	1100	1100	1500	1000	1850	1600
Piston Speed	950 ft/min	1015 ft/min	1010 ft/min	1380 ft/min	920 ft/min	1820 ft/min	1600 ft/min
Brake HP	32	60	82	26.1	51	32	48.5
Weight lbs	160	236	Not Given	174	242	300	550
lbs per bhp	5	3.94	Not Given	6.6	4.7	9.4	11.3
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