Aerospool WT9 Dynamic LSA / Club, Pilot Operating Handbook

Page: 80 / 204

Page 4-14 Initial issue
4.9 Before Takeoff
Before takeoff the engine should be properly warmed. The engine oil temperature must reach min. 50 °C. Then
the ignition and engine ground tests may be performed as follows:
Ignition and Engine Ground Tests
a. CARBUR. PREHEATING Check CLOSED
b. Brake MAX
Ignition and engine ground tests:
c. THROTTLE 4000 rpm
d. IGNITION
Switch OFF first ignition circuit, then back ON;
Switch OFF second ignition circuit, then back ON;
Engine speed drop with only one ignition circuit must not exceed 300 rpm;
Max. difference of engine speed by use of either circuit A or B is 115 rpm
e. THROTTLE Short MAX
f. Engine speed Check, 52 00 rpm ±200 rpm
g. Engine parameters Check
h. CARBUR. PREHEATING
OPEN, check carburetor preheating function (engine speed drop min. 100 rpm);
Then CLOSE
i. THROTTLE IDLE, check min. 1400 rpm
WARNING
Before engine full-power ground test ensure that the propeller
area is clear!
WARNING
Position the aircraft so that the prop wash will not hurt any
persons, or cause any damage! Never perform a ground test
against any buildings or obstacles!
CAUTION
The engine full-power ground test should be performed
with the aircraft heading upwind. Do not perform the engine
full-power ground test on a gravel surface. The propeller may
sucks the gravel and damage the blades!