Oh...Last week I tested the integrity of the static system by tapped into the alternate static line. My system has a switch that has two NPT ports, one for the normal system and the other for the alternate system and I used NPT threaded fittings with a barbed end to connect the flexible tubes. To test the static system I placed a long flexible tube in a 5 gallon bucket of water and then connected the tube to the alternate static port fitting barb and then raised the tube out of the water.
Since a couple of feet of tube was submerged in water to begin with, once it was raised out of the water there was about 3 feet of negative head pressure and then when the altimeter showed 1000 feet I clamped the tube to the side of the bucket and waited. Since the altimeter was still showing 1000 feet after an hour I was confident that the system was air tight.
It is a lot less expensive to test out the system before the guy shows up.
Also with the new software update there was no turning on or off the system...just turn it on, enter the Hardware calibration mode and his fancy and expensive equipment will suck the system up to the various altitudes and record the altimeter indications at each step.
He said the Dynon was very simple to test compared to some.
Interestingly, when he tested the pitot system probe the indicated pitch attitude changed violently when the pressure was added to the tube because the ADAHRS was getting confused and trying to compensate.
