SECTION 4. Using the Ground Support Unit (GSU)
Menu item
Description
1.1
RPM FULL THR.
The full throttle RPM. Can be set lower than the default value, e.g. to limit
the resulting thrust and / or fuel consumption.
1.2
RPM IDLE
Can be lowered slightly or increased from the default setting, e.g. in extreme
ambient conditions.
1.3
ACC/DEC DYNAMIC
Can be set to
FAST
,
MEDIUM
(default) or
SLOW
to adjust the engine’s respons-
iveness to the throttle position.
1.4
THROTTLE CURVE
The throttle position can govern the RPM, the thrust, or a convex combina-
tion of the Two, Here, the fraction of the nonlinear part corresponding to the
thrust can be set. 0% means the throttle position governs the RPM, 100% that
it approximately governs the thrust. A combination of the two (20% - 70%)
is recommended for better control at both low and high RPM (see Section
5.2.3).
1.5
PUMP VOLTAGE
START
Adjusts the fuel pump voltage during startup. If it is set too low, the autostart
program may fail due to a fuel shortage. If it is set too high, excess fuel might
extinguish the combustor or even produce an open flame in or after the thrust
nozzle!
1.6
FAILSAFE PROGRAM
Adjust
the
FAILSAFE DELAY
,
FAILSAFE TIMEOUT
and
FAILSAFE
THROTTLE
(see Section 5.6).
Table 5: Entries in the
RUNTIME SETTINGS
menu.
Menu item
Description
2.1
LEARN RC TIMING
The RC timings must be learned, see Section 4.5.2.
2.2
SET AMBIENT TEM-
PERATURE
The ambient temperature should be set at the beginning of each session as
functions and safety checks depend on it.
2.3
BATTERY VOLTAGES
Set the voltage at which the battery is considered empty or full here. This is
important for the battery warning.
2.4
FUEL CONSUMPTION
Set the fuel flow at fuel pump voltages 1
V
and 2
V
and the fuel tank size here.
2.5
RC SWITCH FUNC-
TIONS
The RC switch can be set to
NO FUNCTION
,
ON/OFF SWITCH
(to replace the
trimming, see Section 5.8.1) or
SMOKER VALVE
(see Section 5.8.2) here.
Table 6: Entries in the
USER ADJUSTMENTS
menu
Menu item
Description
3.1
LANGUAGE
Switch between English and German (Deutsch).
3.2
ENGINE STATISTICS
Show engine statistics using up (
↑
↑
) and down (
↓
↓
) keys, such as the connected
engine type, firmware version, total run time, serial number, manufacturing
week and year and the total number of revolutions.
3.3
TELEMETRY MODULE
Here the telemetry sampling rate can be set between 0
/
s
(off) and 10
/
s
and
a com channel between 1 and 9 can be chosen.
3.4
RESET TO DEFAULTS
The ECU can be reset to factory defaults, overwriting all user adjustments.
Table 7: Entries in the
SYSTEM AND PERIPHERY
menu
4.5.4
GPS and airspeed value
In this sub menu, data from the GPS module (if any) can be displayed by using the up (
↑
↑
) and down (
↓
↓
) keys
on seven screens. Enter (
✓
) has no function in this sub menu, and escape (
✘
) returns to the main menu.
1.
LA, LO
: Latitude and longitude.
2.
U, C
: UTC time and GPS fix status (
NOK
for
not OK
,
OK
for a valid GPS position,
3D
for a valid 3D GPS
position) in the first line, current movement direction in degrees and number of satellites in use (should
be about seven in most circumstances).
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