Gnome B2 Monosoupape

air-cooled 9 -cylinder Monosoupape rotary engine 100 [hp](73.6 KW)

introduction : oktober 1914 country : France

applications : Airco DH2

normal rating : 100 [hp](73.6 KW) at 1160 [rpm] at 0 [m] above sea level

106 [hp] at 1230 [rpm] at sea level

Max rating : 115 [hp] at 1300 [rpm] at sea level

no reduction, direct drive, valvetrain : 1 exhaust-valve

weight engine(s) dry : 137.0 [kg] = 1.86 [kg/KW]

bore : 110.0 [mm] stroke : 150.0 [mm]

compression ratio: 4.85 :1

published volume (displacement): 12.800 [litre]

calculated stroke volume (Vs) : 12.829 [litre]

compression volume (Vc): 3.332 [litre]

total volume (Vt): 16.162 [litre]

power / stroke volume (litervermogen Nl): 5.7 [kW/litre]

torque : 605 [Nm]

engine weight/volume : 10.7 : [kg/litre]

average piston speed (Cm): 5.8 [m/s]

intake pressure at 0 [m] hoogte Pi : 0.95 [kg/cm2]

mean engine pressure (M.E.P.) at 0 [m] hoogte Pm : 5.72 [kg/cm2]

compression pressure at 0 [m] hoogte Pc: 7.21 [kg/cm2]

estimated combustion pressure at 0 [m] Pe : 28.82 [kg/cm2]

exhaust pressure at 0 [m] Pu : 3.80 [kg/cm^2 ]

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compression-end temperature at 0 [m] Tc: 571 [°K] (297 [°C])

caloric combustion temperature at 0 [m] Tec: 2196 [°K] (1923 [°C])

polytrope combustion temperature at 0 [m] Te (T4): 2275 [°K] (2002 [°C])

exhaust temperature at 0 [m] Tu: 1249 [°K] (976 [°C])

Thermal efficiency Nth : 0.33 [ ]

Mechanical efficiency Nm : 0.66 [ ]

Thermo-dynamic efficiency Ntd : 0.21 [ ]

design hours : 1272 time between overhaul : 148

fuel consumption optimum mixture at1160.00 [rpm] at 0 [m] : 32.61 [kg/hr]

specific fuel consumption thermo-dynamic : 295 [gr/epk] = 401 [gr/kwh]

specific fuel consumption (cruise power) at 0 [m] optimum mixture : 425 [gr/kwh]

specific fuel consumption at 0 [m] at 1160 [rpm] optimum mixture : 443 [gr/kwh]

estimated specific oil consumption (cruise power) : 110 [gr/kwh]

DISCLAIMER Above calculations are based on published data, they must be

regarded as indication not as facts.

Calculated performance and weight may not correspond with actual weights

and performances and are assumptions for which no responsibility can be taken.

Calculations are as accurate as possible, they can be fine-tuned when more data

is available, you are welcome to give suggestions and additional information

so we can improve our program.

For copyright on drawings/photograps/content please mail to below mail address

(c) B van der Zalm 13 december 2018 contact : bvanderzalm@ziggo.nl python 3.4.1