O.S. Engines 140RX-FI - Manual (Page 16)

1,700
~
1,800r.p.m.
6,400
~
6,600r.p.m.
7,300
~
8,000r.p.m.
1,700
~
1,800r.p.m.
6,400
~
7,000r.p.m.
7,300
~
7,900r.p.m.
TMax OOO : O , OOO Max
General reference
for engine speed Case of a 16 x 14,
2-blade propeller Case of a 15 x 13.5,
3-blade propeller
Full slow engine speed
Intermediate slow
engine speed
Full high engine speed
Note:
The engine speed will not be the same depending on propeller variations, engine
mounting method, linkage method between the throttle servo and air valve, and
differences in the fuel used.
If the engine speed is quite different from those shown above, it may mean that the setting for
the throttle servo and air valve linkage is incorrect or the fuel injection trim volume has changed
considerably. Check these items by returning to the procedure for readjustment.
When engine speed is abnormally high, always make sure to stop the engine and inspect
the problem since this can cause damage to the engine.
In cases when there are considerable temperature changes during the course of a day
such as in the spring and autumn, the fuel injection volume may not be able to keep with
engine performance to a certain extent. If this happens, readjust the injection trim
adjustment dial (spare channel dial) before further use.
Note:
•
•
Post-Operation Menu
Following the completion of a flight, engine flight status can be confirmed by pressing the function
key without turning off the power of the receiver. This information can be used as flight data.
This data is erased when the power is turned off.
Maximum Temperature Display Maximum Engine Speed Display
Flight Adjustment
The next step is to take the airplane on an actual flight. The Fine adjustment mode is used for
making flight adjustments. Switch the ATL to Fine. Although this adjustment has already been
made, recheck the limit Lmt Low and marks and whether they are set to Fine.
Put the throttle stick in the slow position and after starting the engine and allowing it to warm up,
check the stability of engine speed in the slow position (by confirming that the engine does not
stall) and try flying the airplane.
After taking off, fly level for several minutes. Next, repeat flying level in a straight line at full speed.
(This is one way to check the difference in engine speeds when on the ground and in flight.) If it
appears that engine speed fluctuates while flying straight, this indicates that excessive fuel is
being supplied to the engine. Turn the injection trim adjustment dial (spare channel dial) in the (-)
lean direction by about 15˚ (about 3 clicks) with the throttle stick in the full high position. Then
repeat flying straight in the same manner as before. Repeat this adjustment procedure until
engine speed has stabilized. (The engine speed will not change immediately after the air-fuel
mixture has been changed. Fly the airplane straight several times to confirm that engine speed
has become stable.) When flying straight as described above, fly both into the wind and with the
wind. Adjustment is completed when there are no disturbances in engine speed when flying level.
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