I concur with the comments about working with Dynon, and the subjective nature of the poll, but will say enthusiastically that Dynon worked with me diligently throughout my install and troubleshooting, and I am pleased with the results.
I answered B.) Good performance in all weather conditions, but would modify it to say that it is very solid in smooth air, and descent in light turbulence and up/downdrafts, such as I have seen over the mountains at times. I did have some pitch oscillations early on, and did the servo screw and castellated nut adjustment per the Dynon instructions, and have been pleased with the results. I also recently uploaded the 5.1.1 software update...waited a bit as I heard that some were having issues with 5.1, but the fix was put out by Dynon very rapidly, and I've had no issues with 5.1.1. No extensive experience with other similar GA AP's but will say that it flies my airplane well.
I have an RV-6 (Super Six, so it's a bit heavier overall, but FWIW has light controls, per my experience and that of my seller, an experienced Rocket builder/flyer). AP-74 and 2 SV-32 Servos. Torque (both) set at 100%. Sensitivity set at 15 pitch, 8 roll seems to be the sweet spot for smooth air, and the ability to adjust those values in flight in bumpy air makes for acceptable performance there (another subjective comment, of course). Quantitatively, I see +/- 10-20' in ALT hold with smooth corrections most of the time, and good 500 fpm climbs/descents with an occasional bump, and pretty good level offs. Roll control is very solid in NAV, and +/- a couple degrees in HDG, with just the occasional bump. I personally think roll control is a little more solid in NAV, but only lightly less so in HDG. If the roll bumps get more noticible it's usually due to fuel burn/balance, and a tweak of the airleron trim alleviates them. Pitch and roll trim are key to good performance (probably an obvious statement
), but that's likely true for all similar units.
A good example of the performance would be a X-C this past week from Reno to San Luis Obispo and back to do a dynamic balance on my prop. I flew on AP and took "before and after" vibration readings with an app on my iPhone (a separate post for later). AP made the task easy, held HDG and ALT quite well and made very smooth turns between runs. It's been very comfortable on the X-Cs I've taken since installation.
Overall a very nice piece of gear, with lots of nice features that are even nicer with the AP-74.
Cheers,
Bob