SECTION 2. Components and connecting
2
Components and connecting
For operating a model jet engine, the following components need to be connected to the H
ORNET
-III:
1. A Ground Support Unit (GSU).
2. An I/O board (with LED and buzzer).
3. RPM and temperature sensors together with an amplifier.
4. A fuel pump.
H
ORNET
-III
: Analogue pump, e.g. the AeroDesignWorks B100F and B140F ship with HP-Tech
ZP30725F pumps, while the B300F ships with an HP-Tech ZP48031 pump.
H
ORNET
-III-ClubSport
: Brushless pump, e.g. the AeroDesignWorks B140F ClubSport ships with
an HP-Tech BZP21L40 pump.
5. A battery for power supply.
All new AeroDesignWorks model jet engines ship with these accessories except for the battery. How these
components are connected is shown in Figure 1a.
Note that there are two fuel valves for the two fuel lines labeled
KEROSENE
and
IGNITION
on the engine.
These valves and their fuel lines refered to as
main
and
ignition
in this manual.
2.1
Ground support unit
The usage of the GSU is covered in Section 4.
2.2
I/O board
The I/O board can (and should be) placed between the GSU and the H
ORNET
-III. It can be kept in the model
will use the LED and the speaker for feedback.
LED
1.
Green:
Engine is off.
2.
Orange:
Engine is in standby mode and ready to accept the starter signal from the RC.
3.
Red:
Engine is running in automatic mode.
Speaker
1.
Short beeps:
ECU starting.
2.
Long beep:
Engine is starting.
3.
Sequence of short beeps:
Error message: Low battery voltage, temperature sensor failure or glow plug
failure
When the engine is off, the button can be pressed to operate the fuel pump (e.g. if there is a lot of air in the
fuel lines).
WARNING
Be careful not to flood the engine with fuel!
4