AIRCRAFT INVESTIGATION >>>> HOME PAGE
liquid-cooled 6 -cylinder inline engine 163 [hp](119.9 KW)
introduction : March 1915 country : Germany importance : *****
applications : Albatros C.III, Halberstadt CL.IV, Rumpler C.I, LFG Roland C.II
normal rating : 163 [hp](119.9 KW) at 1400 [rpm] at 0 [m] above sea level
no reduction, direct drive, valvetrain : SOHC
weight engine(s) dry : 299.0 [kg] = 2.49 [kg/KW]
bore : 140.0 [mm] stroke : 160.0 [mm]
Mechanical efficiency/meanpressure correction factor : 0.634 [ ]
invloed hoogte > cm : 0.24 [ ]
compression ratio: 4.50 :1
calculated compression ratio : 4.50 : 1
published volume (displacement): 14.778 [litre]
calculated stroke volume (Vs) : 14.778 [litre]
compression volume (Vc): 4.222 [litre]
total volume (Vt): 19.000 [litre]
power / stroke volume (litervermogen Nl): 8.1 [kW/litre]
torque : 818 [Nm]
engine weight/volume : 20.2 : [kg/litre]
average piston speed (Cm): 7.5 [m/s]
***************************************************************************
intake pressure at 0 [m] hoogte Pi : 0.95 [kg/cm2]
mean engine pressure (M.E.P.) at 0 [m] hoogte Pm : 5.78 [kg/cm2]
compression pressure at 0 [m] hoogte Pc: 6.55 [kg/cm2]
estimated combustion pressure at 0 [m] Pe : 26.18 [kg/cm2]
exhaust pressure at 0 [m] Pu : 3.80 [kg/cm^2 ]
**************************************************************************
compression-end temperature at 0 [m] Tc: 575 [°K] (302 [°C])
caloric combustion temperature at 0 [m] Tec: 2163 [°K] (1890 [°C])
polytrope combustion temperature at 0 [m] Te (T4): 2296 [°K] (2023 [°C])
exhaust temperature at 0 [m] Tu: 1349 [°K] (1076 [°C])
*********************************************************************************
emergency/TO rating can be increased with higher [rpm}
(emergency/take off) rating at 1533 [rpm] at sea level : 178 [pk]
Thermal efficiency Nth : 0.313 [ ]
Mechanical efficiency Nm : 0.760 [ ]
Thermo-dynamic efficiency Ntd : 0.238 [ ]
design hours : 1305 time between overhaul : 109
fuel consumption optimum mixture at 1400.00 [rpm] at 0 [m]: 48.29 [kg/hr]
specific fuel consumption thermo-dynamic : 265 [gr/epk] = 361 [gr/kwh]
SOHC valvetrain
specific fuel consumption (cruise power) at 0 [m] optimum mixture : 370 [gr/kwh]
estimated sfc (cruise power) at 3000 [m] rich mixture : 382 [gr/kwh]
specific fuel consumption at 0 [m] at 1400 [rpm] optimum mixture : 403 [gr/kwh]
estimated specific oil consumption (cruise power) : 21 [gr/kwh]