This is the CarComp capture fileof the OBDII software in my
notebook computer. It is an accelleration run showing
time, rpm, mph, ignition advance and throttle position.
the data is stored on the hard disk in industry standard
comma delimited form and therefore can be loaded into
any spredsheet or data base program. I loaded the data
into Lotus 123 and edited it and saved it as a text file.

Any car on the market today puts out this kind of data.
Even the lowly Geo Metro. All you need is a notebook
PC, software and cable to access it.

The same idea can be provided by an aircraft engine 
system computer. Tracy's computer has an input for
GPS. It also has an RS232 interface. With a few minor
changes in Tracy's software it could put out 
ignition advance, throttle position, manifold pressure,
intake air temperature, injector pulse width, RPM,
GPS data and whatever else in there of interest
every one second through the RS232 interface.

A notebook computer can be set up to capture the data
without the pilots intervention other than turning it
on. Any communcation program can be configured to capture
data to a file on the hard disk.

Sorry Tracy, I know you have your plate full but perhaps
next year? :-)


        TIME      RPM       MPH    IGN ADV  THROT%
        0.00    560.00     0.00    22.00    19.20
        0.55    560.00     0.00    22.00    19.20
        1.44    538.00     0.00    22.00    19.20
        2.31    554.00     0.00    22.00    19.20
        3.20    552.00     0.00    22.00    19.20
        4.07    556.00     0.00    22.00    19.20
        4.95    556.00     0.00    22.00    19.20
        5.99    564.00     0.00    22.00    20.80
        6.88    552.00     0.00    22.00    23.50
        7.80   1028.00     0.00    28.50    23.50
        8.74   1024.00     2.00    26.00    27.80
        9.63   1448.00     5.00    27.50    40.00
       10.55   2008.00     9.00    27.50    49.00
       11.48   2584.00    15.00    29.50    46.70
       12.48   3248.00    20.00    29.00    46.70
       13.35   3840.00    26.00    29.50    47.50
       14.28   3120.00    30.00    27.00    52.20
       15.27   2736.00    35.00    27.50    50.20
       16.27   2992.00    39.00    28.00    49.40
       17.25   3200.00    43.00    28.00    49.80
       18.19   3392.00    46.00    28.00    49.40
       19.06   3520.00    48.00    28.50    47.50
       19.95   3584.00    50.00    28.50    48.20
       20.82   3664.00    52.00    28.50    48.20
       21.70   3760.00    53.00    29.50    42.40
       22.63   3776.00    54.00    33.00    35.70
       23.57   3792.00    55.00    36.50    31.00
       24.50   2880.00    56.00    34.50    24.70



Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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