Cool! You can see how the EGT drops off on descent, and is at the lowest point about as you land, and then increases as you taxi. Now, if you were only turbocharged, we could look at the TIT and determine whether the 5 minute cooling off period makes any sense!
Well, I think 5 minutes since the wastegate has been anything but wide open makes sense, still - Even at shutdown, the lowest EGT was over 850 degrees. Assuming EGT is roughly equal to TIT, the innards of the turbo are gonna be very hot and need to cool off. However, fixed-wastegate birds like the Seneca may not be getting helped nearly as much.
Anyway... Some interesting things I've found from looking at the raw data and the CirrusReports graphs:
1) It took the engine a full 5 seconds to shut off (from 642 RPM to 0).
2) The VSI transducer is maybe a wee bit too sensitive! The VSI readings sitting still on the ground seem to be all over the place, within about a ±30 fpm range. I guess now I understand why the VSI's digital display does not show anything less than 100 fpm, and has a resolution of only 50 fpm. Otherwise, it'd be all over the place!
3) It's kind of cool to be able to look at the various parameters and figure out exactly what was going on - For example, I used the RPM to find the time where I started the runup, and was able to see the mag checks by looking at the RPM drop and corresponding EGT increase. I can also see when I primed and started the engine by the fuel flow and such. Neat!
3a) Some things are pretty easy to find: Engine start, shutdown, and runup (via RPM), beginning and end of taxi and beginning of takeoff roll (via GS), etc... But finding the exact second of liftoff or touchdown is amazingly difficult! For example, on takeoff from runway 21 at KMSN you're going downhill. At 13:46:02, rotation speed (IAS) is reached. At 13:46:03, pitch attitude begins to show a noticeable increase. At 13:46:04, the MSL altitude is at its lowest, pitch reaches nearly 5 degrees, and the IAS records a "blip" where it gets 1/2 knot slower before acceleration continues. At 13:46:05, the Baro altitude is lowest. Finally, at 13:46:07 the VSI begins to indicate in positive territory. Figuring out exactly when I touched down is even more difficult!
4) What everyone really wants to know: In cruise, at an average power setting of 23.69" MP and 2203.2 RPM, average altitude of 6503 feet MSL, we got an average true airspeed of 134 KTAS at an average fuel burn of 8.53 gph.
Some things I still need to figure out:
1) Where the "AltMSL" is getting its data. There's also a column for "AltB" which is the barometric altitude (shown on the tape) and another column for "AltGPS". The units shown are: AltMSL in "ft MSL", AltB in "ft Baro", and AltGPS in "ft WGS". So maybe the AltMSL is the GPS altitude with a correction for the WGS? On the ground at MSN, I got roughly 865 ft Baro, 905 ft MSL, and 791 ft WGS (field elevation is 887, ramp elevation is ~840 on the other planes' altimeters, so the "ft MSL" is closest) at an OAT of 13.2ºC. Upon reaching cruising altitude of 6500 feet, I get 6505 ft Baro, 6570 ft MSL, and 6458 ft WGS at an OAT of 12.8ºC.