AIRCRAFT INVESTIGATION

aero engine performance calculations

Beardmore 160hp

liquid-cooled 6 -cylinder inline engine 160 [hp](117.7 KW)

introduction : April 1916 country : United Kingdom importance : ****

applications : Martinsyde G.102 Elephant

normal rating : 160 [hp](117.7 KW) at 1250 [rpm] at 0 [m] above sea level

no reduction, direct drive, valvetrain :

weight engine(s) dry : 279.0 [kg] = 2.37 [kg/KW]

bore : 142.0 [mm] stroke : 175.0 [mm]

Mechanical efficiency/mean pressure correction factor : 0.635 [ ]

invloed hoogte > cm : 0.58 [ ]

compression ratio: 4.56 :1

calculated compression ratio : 4.56 : 1

published volume (displacement): 16.635 [litre]

calculated stroke volume (Vs) : 16.629 [litre]

compression volume (Vc): 4.671 [litre]

total volume (Vt): 21.300 [litre]

power / stroke volume (litervermogen Nl): 7.1 [kW/litre]

torque : 899 [Nm]

engine weight/volume : 16.8 : [kg/litre]

average piston speed (Cm): 7.3 [m/s]

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

mean engine pressure (M.E.P.) at 0 [m] altitude Pm : 5.65 [kg/cm2]

compression pressure at 0 [m] altitude Pc: 6.66 [kg/cm2]

estimated combustion pressure at 0 [m] Pe : 26.63 [kg/cm2]

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

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compression-end temperature at 0 [m] Tc: 573 [°K] (300 [°C])

caloric combustion temperature at 0 [m] Tec: 2168 [°K] (1895 [°C])

polytroph combustion temperature at 0 [m] Te (T4): 2287 [°K] (2014 [°C])

exhaust temperature at 0 [m] Tu: 1323 [°K] (1050 [°C])

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emergency/TO rating can be increased with higher [rpm}

(emergency/take off) rating at 1369 [rpm] at sea level : 175 [pk]

Thermal efficiency Nth : 0.316 [ ]

Mechanical efficiency Nm : 0.760 [ ]

Thermo-dynamic efficiency Ntd : 0.240 [ ]

design hours : 1225 time between overhaul : 107

fuel consumption optimum mixture at 1250.00 [rpm] at 0 [m]: 48.58 [kg/hr]

specific fuel consumption thermo-dynamic : 263 [gr/epk] = 358 [gr/kwh]

specific fuel consumption (cruise power) at 0 [m] optimum mixture : 370 [gr/kwh]

estimated sfc (cruise power) at 1950 [m] rich mixture : 399 [gr/kwh]

specific fuel consumption at 0 [m] at 1250 [rpm] optimum mixture : 413 [gr/kwh]

estimated specific oil consumption (cruise power) : 21 [gr/kwh]