AMC E 620 Performance:
Formulae
ED Decision 2007/015/R
(1) The following corrections from the observed test conditions to the assumed atmospheric conditions of pressure and temperature should be used within the range of conditions appropriate to the particular type of Engine, i.e. taking into account the characteristics of the Engine Control System, and the possible effect of Reynolds Number, unless more accurate or additional corrections for a particular type of Engine have been agreed or required by the Agency.
Gas Pressures
S.I. Units
Gas Temperatures
Rotational Speed
Thrust
S.I. Units
Mass Air Flow
S.I. Units
In cases where certain proprietary types of air flowmeter are employed, it should be noted that Wo is the actual air consumption of the Engine during test.
Fuel Flow
S.I. Units
Power
S.I. Units
(2) Notation
|
B |
= |
Barometric pressure in test chamber |
hPa |
|
θ |
= |
Observed intake temperature, corrected for instrument temperature and scale errors only |
K |
|
P |
= |
Pressure |
hPa |
|
T |
= |
Temperature |
K |
|
N |
= |
Rotational speed |
rpm |
|
F |
= |
Thrust |
kN |
|
W |
= |
Mass air flow |
kg/s |
|
w |
= |
Fuel flow |
kg/h |
|
P |
= |
Power |
kW |
(3) Suffixes
Suffix ‘o’ denotes an observed result, corrected for instrument temperature and scale errors only. Suffix ‘c’ denotes a result corrected to the standard atmospheric pressure and temperature conditions of CS-E 620.
[Amdt. No.: E/1]