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I've been tinkering with some pretty cool Python code that for the IO-360A,
or the O-360A/C creates a very nice table of output similar to the below.
(for the O-360A as an example).
----------------------------------------------------------------------------
------------------------
| Press. | Std. | 100 HP -- 55% Rated | 117 HP -- 65% Rated |
135 HP -- 75% Rated
| Alt. | Alt. | Approx. Fuel 7.8 Gal/Hr | Approx. Fuel 9 Gal/Hr. |
Approx. Fuel 10.6 Gal/Hr
| 1000 |Temp. | | |
| Feet |deg F | RPM & Man. Press. | RPM & Man. Press. |
RPM & Man. Press.
----------------------------------------------------------------------------
------------------------
| | | 2100 | 2200 | 2300 | 2400 | 2100 | 2200 | 2300 | 2400 |
2100 | 2200 | 2300 | 2400
| 0| 59| 21.0 | 20.3 | 19.8 | 19.3 | 23.5 | 22.7 | 22.1 | 21.6 |
26.1 | 25.1 | 24.5 | 23.9
| 1000| 55| 20.7 | 20.0 | 19.5 | 19.0 | 23.3 | 22.4 | 21.8 | 21.3 |
25.8 | 24.8 | 24.2 | 23.6
| 2000| 51| 20.4 | 19.7 | 19.2 | 18.8 | 23.0 | 22.1 | 21.6 | 21.1 |
25.5 | 24.5 | 23.9 | 23.3
| 3000| 48| 20.2 | 19.4 | 19.0 | 18.5 | 22.7 | 21.8 | 21.3 | 20.8 |
25.2 | 24.2 | 23.6 | 23.1
| 4000| 44| 19.9 | 19.2 | 18.7 | 18.3 | 22.4 | 21.5 | 21.0 | 20.5 |
24.9 | 23.9 | 23.3 | 22.8
| 5000| 41| 19.7 | 18.9 | 18.5 | 18.0 | 22.1 | 21.3 | 20.8 | 20.3 |
FT | 23.6 | 23.1 | 22.5
| 6000| 37| 19.4 | 18.7 | 18.2 | 17.8 | 21.9 | 21.0 | 20.5 | 20.0 |
FT | FT | 22.8 | 22.3
| 7000| 34| 19.1 | 18.4 | 18.0 | 17.6 | 21.6 | 20.8 | 20.3 | 19.8 |
FT | FT | FT | 22.0
| 8000| 30| 18.9 | 18.2 | 17.8 | 17.4 | 21.4 | 20.5 | 20.0 | 19.6 |
FT | FT | FT | FT
| 9000| 26| 18.7 | 18.0 | 17.6 | 17.2 | FT | 20.3 | 19.8 | 19.3 |
FT | FT | FT | FT
| 10000| 23| 18.5 | 17.8 | 17.3 | 17.0 | FT | FT | 19.6 | 19.1 |
FT | FT | FT | FT
| 11000| 19| 18.3 | 17.6 | 17.1 | 16.7 | FT | FT | FT | 18.9 |
FT | FT | FT | FT
| 12000| 16| 18.0 | 17.3 | 17.0 | 16.6 | FT | FT | FT | FT |
FT | FT | FT | FT
| 13000| 12| FT | 17.2 | 16.7 | 16.4 | FT | FT | FT | FT |
FT | FT | FT | FT
| 14000| 9| FT | FT | 16.6 | 16.2 | FT | FT | FT | FT |
FT | FT | FT | FT
| 15000| 5| FT | FT | FT | 16.0 | FT | FT | FT | FT |
FT | FT | FT | FT
----------------------------------------------------------------------------
------------------------
It simply takes the numbers off the Lycoming engine charts (from the owners
manuals), and then does some math. He's built a library in Python that does
most of the extrapolation and conversions. It's actually pretty simple
code, but does take a little programming knowledge and some very basic
Python knowledge (www.python.org).
I'm working on an IO-540AB version at the moment. Probably the toughest
part is taking some altitude values and converting them to Density Ratios,
but Kevin wrote some code that does that as well.
Seeing as we've been on this "technical" kick for a few days (thanks Rick
Titsworth), I figured I'd post this. If anyone is interested, I can
probably provide basic support, but I'm no crack python programmer.... Yet
:)...
I've reprinted most of the required information from Kevin here.
http://legacyfg.jconserv.net/viewtopic.php?t=78
Have fun,
Alan
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