Wren 44 TurboProp Users Manual. Copyright Wren Turbines Ltd February 2008 Page 28
The display should now change to:
Leaving the throttle stick in the minimum position, raise the
throttle trim to the full up position or switch “Engine Cut” switch
to off, and again press the right (+) button.
If you have done all steps correctly a blue LED will light up in
the end of the ecu under the display plug, and the display will
change to:
NB. The value for acceleration delay may be set other than shown – do not alter it.
Lower your throttle trim and the green light should turn off or go very dim. If it does not then you need to
reverse the throttle channel,
and repeat the radio set-up.
This completes your radio setup and should only need doing again if the radio settings are changed
significantly or if you suspect the setup to have altered.
You will note there are many settings, which can be adjusted in the ECU. Please resist the temptation to
change things as firstly this is unnecessary as they are preset 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 ECU to the engine. These are then optimised to suit each
engine. Do not change the values present in your ecu without referring back to Wren Turbines.
Max rpm
–
195,000rpm.
Idle rpm
–
55,000rpm.
Stop rpm
–
32,000rpm.
Start temp’
–
100’C.
Max temp’
–
848’C.
Acceleration delay
–
5-10.
Deceleration delay
–
10-30
Stability Delay
–
50.
Pump start point
–
Auto+1.
Pump Start Ramp
–
006.
Glow plug power
–
32-36
Stick Down
Stick Down
Stick Down
Stick Down
Trim Up
Trim Up
Trim Up
Trim Up
(Idle)
(Idle)
(Idle)
(Idle)
Acceleration
Acceleration
Acceleration
Acceleration
Delay 005
Delay 005
Delay 005
Delay 005
Timer:
Timer:
Timer:
Timer:
Tot:0000m
Tot:0000m
Tot:0000m
Tot:0000m
Last: 000s
Last: 000s
Last: 000s
Last: 000s
Cy:000
Cy:000
Cy:000
Cy:000
