March 15, 2008
The numeric display has up to 7 "MODE" selected groups of 4 values. This is MODE 0 the base mode for most flying. Other modes display EGT CHT, density altutude, HOBBS and true airspeed etc.
The bar graph at the left is the CLIMB
red is decending green climbing 25fpm to 2500fpm
as seen here climbing at 500fpm
Top bar graph is Tach 2000 to 7000 showing 4,900rpm
Right side is the airspeed bar graph. at 57mph
Altitude 4,290 feet
The red and green leds left of the bottom 7 slegment display is for climb readout of + or -
Sorry the focus is a bit off at this close distance.
Here is some other data Tach shows 4,600 rpm
Climbing 200fpm
airspeed 51mph
alt 26feet
The bar graphs have fixed upper limits, the numeric display just keeps going no matter how high.
The climb is 2400fpm at limit of bar graph
altitude 48feet
You can set the lower limit and step size of the tach and airspeed to scale the display and center points.
So if you want 5500rpm at top center you can set it up that way.
I have more light on the board so you can see it better
When the computer is in it's case the display is 3.4 inch square and is designed to fit into a standard 3 1/8 aircraft panel opening. A second small box will be mounted with the engine to collect engine data and send it to the display computer.
In flight a single button allows you acces to all the display modes and data.
30+ FUNCITON PANEL
ALT -3000' TO 32000'
AIRSPEED
STALL WARN LIGHT & HORN
STICK SHAKER (PAGER MOTOR)
CLIMB
TACH
PROP TACH
ENGINE TO PROP RATIO (BELT SLIP)
ROTOR RPM WHEN ROTOR WING SELECTED
DUAL/QUAD EGT
DUAL/QUAD CHT
HOBBS
OAT (outside aire temperature)
WIND CHILL
DENSITY ALTITUDE
TRUE AIRSPEED
HUMIDITY
ELAPSED TIME
ENGINE SAVER IGNITION STUTTER
WATER TEMP
OIL TEMP
OIL PRESSURE
FUEL LEFT
FUEL RIGHT
BATTERY VOLTS
FLIGHT DATA LOGGING TO REMOVABLE SD MEMORY CARD
GPS DATA INPUT FROM NEMA STANDARD GPS RECEIVER
GPS HEADING, BEARING, SPEED, ALTITUDE, BEARING TO POINT, DISTANCE TO POINT
STORES UP TO 99 FLIGHT PLANS WITH UP TO 99 WAY POINTS
CONTINUAS SERIAL RS232 DATA LOGGING OUTPUT OR ENGINE RUN DIAGNOSTIC
VARIOMETER SPEAKER OUTPUT FOR SORING
I have most of the display mode software done, the engine computer is working but haven't tested it on an engine. Tach, EGT, CHT battery, and sending unit inputs are working.
Display modes are working for base mode and 6 extended display MODES:
MODE FUNC
0 ASP,ALT, CLI, TAC (Tach, airspeed, altimiter and climb)
1 ENGINE EGT1,EGT2,CHT1,CHT2
2 GAL ALT BRO barometer setting (GAL only if GPS)
3 bat hobbs and elapsed time
4 OAT TAS DA (outaide air temp, true airspeed adjusted for temp and altitude, density altitude)
5 GPS HD BER GSP DIS (heading, bearing to a waypoint, gps speed and distance to waypoint)
6 OP OT FL FR (oil pressure, oil temp, fuel left and fuel right these sensors are re-definable for air cooled)
Modes are selected with a single button on the front of the unit or a remote mounted button on the stick.The bar graph functions NEVER change but the 4 numeric lines change with function. A 3 letter prompt appears on each line of the display for 1 second when switching display modes. These prompts que you what each display line is and what mode you are looking at.
Airspeed input can be from a rotating propeller or from a pitot static system. A propeller or anamometer gives better low speed input than the pitot static. I am haveing problems getting a good airspeed reading below 25mph from pitot static.
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Too many projects and not enough time.....