Wren 44 Gold Helicopter Owners Manual
Page 25
your transmitter and repeat the radio set-up.
Do not attempt to run the engine without
checking the trim- down will shut the engine off.
This completes your radio set-up. It should only need doing again if the radio settings are
changed or installation moved to another radio but it is worth rechecking periodically.
You will note there are many settings, which can be adjusted in the ECU – many are to
adjust the kero start system. Please resist the temptation to change things as firstly this is
unnecessary as they have been preset and tuned at initial assembly for optimum
performance of your engine, and secondly you may change something which will adversely
affect the starting and running of the engine.
Running Time Counter.
Using the 2nd left hand button (v), scroll through the menu’s to the last menu.
The screen contains a timer which shows:
the total running time of the engine in minutes (Tot),
the time in seconds of the last engine run (Last)
the total number of starts (cycles - CY) .
Use this screen to keep track of your total running time and starts.
Basic ECU Settings
These are the
initial
settings used in setting up the ‘Fadec AU107’ ECU to the engine.
These are then optimised to suit each engine.
Max rpm
–
175,000rpm (user adjustable up to a maximum of 195K).
Idle rpm
–
55,000rpm.
Stop rpm
–
28,000rpm.
Start temp’
–
100
0
C.
Max temp’
–
800
0
C.
Acceleration delay
–
8-12.
Deceleration delay
–
10-15
Stability Delay
–
100.
Pump start point
A number between 30 and 50.
Pump Start Ramp
–
004.
Glow plug power
–
6.5v
PW limit
-
600, with Hausl ZP25M15 magnetic fuel pump
The last item – PW limit may need raising if you need to operate your engine above the 175k
rpm setting:
Raise PW to 650 for up to 185k rpm, 700 for up to 190k rpm, or 750 up to 195k rpm. Do not
raise the setting if you are staying with the 175k rpm limit as it can cause throttle instability.
Do not change the values present in your ECU without referring back to Wren Turbines.
Timer:
Tot:0000m
Last: 000s
Cy:000
