Obviously you can tell Scott is a little excited
... And rightfully so... Ya see, even us Lancair drivers get to claim lots of right seat RV time... I think I own the record at the moment at least in 410S - Scotts airplane.
It's one sweet ride mind you.... But alas, before I forget why I'm writing this.
Ok, so let's clear the air.
Scotts Transponder a GTX-327 with v2.02 firmware would not automatically swtich from STBY to ALT at takeoff, nor would it automatically switch back to STBY once he landed. You had to press the buttons in order for that to function. In the 2.02 firmware, there is one setup that provides for the serial interface that the encoder sends it's pressure altitude information on and one serial port that can be used for the automatic switching. Scotts worked for encoder information only.
We talked to GRT and they said that a 327 should only require *one* serial port for *both* encoder info and the data that is required to cause the auto switching. They told us that the GRT needed to be configured for the format that Scott mentioned above, and that the 327 needed to be in the FADEC W/ALT mode. That's when we realized that there was a major firmware upgrade that existed. My 327 has 2.09 in it and it's menu system matched exactly what GRT told us, but Scotts didn't. Hence our interest in swapping out the 327's. With mine installed in Scotts airplane, we made *no* changes except for configuring the single serial port for the correct format (FADC w/ALT). Also, the newer firmware has a diagnostic page in the configuration menus that allow you to see the decoded serial information. That is where wesaw that is was getting SAT, IAT, PALT, DALT, etc in the data stream from the GRT. When that started to work (btw, that screen doesn't exist in the 2.02 firmware), we knew we were golden, but went for a lap around the pattern just to confirm the auto switching.
As mentioned, immediately at rotation, it switched. BTW, I don't think it detected the rotation, it more than likely detected the speed, or pressure change. To be clear, we left the unit in STBY mode and pulled out on the runway, lined up and advanced the throttle. At rotation, the 327 automatically switched to ALT mode, it remained in that mode until we touched down, then 24 seconds (it's configurable) after touch down, it automatically switched back to STBY mode. We never touched a button.
As a side benefit, this auto function, also resets and starts the flight timer automatically (resetting of it is also configurable).
Ok, now before you get all excited, the above does not directly translate to the 330. I have been working thru some wiring glitches in a Lancair that has a 430 and 330 and to get them to perform the same functions as above required an ARINC interface between the two, not a serial one. It also requires a slightly different configuration, but once its right, it works exactly the same.
So, there ya have it. The 2.02 software may function if driven by a 430, but it won't in the formats discussed above with a GRT display. But get the firmware updated and it certainly will.
Hope this helps,