Airspeed Indicator

[kancell]

Hello, I am having trouble getting my Skyview Digital Airspeed Indicator to work. All of my other functions are working well, but my Skyview airspeed indicator will not budge off of zero. I have checked all of my static and pitot lines are clear with no obstructions. This line is hooked up correctly to the Pito input on the ADAHRS which is fed off a "T" joint connected to my steam gauge airspeed indicator works just fine. The GS (Ground Speed) works as well. Is there a setting in setup I need to activate to fix this? I am open to any suggestions!

 

[thibault]

Have you tried to connect a toy balloon to the line feeding the ADAHRS pitot input tube?  If so, does the balloon maintain pressure.  Then, does the PFD display show airspeed? If no success, then connect the balloon directly to the ADAHRS port and repeat the test.  If still no airspeed, replace the ADAHRS box.  Note that it takes very little pressure to get a reading.  Your breath can exceed 300 KIAS worth of pressure.

 

[kancell]

Thank you for the suggestion! I didn't want to damage the ADAHRS by putting too much pressure on it. I will try the balloon method.

 

[Dynon]

Also, make sure that your pitot line is going to the correct port (it's the middle one). If your other IAS indicator is working, I'd also be looking at a kink or blockage in the plumbing. If you get to the point that you're removing the pneumatic connections, you can simply take your finger, seal it against the pitot input on the ADAHRS, and press. By doing that you should be able to create 100+ knots easily. You can't break the ADAHRS that way either, by the way.

 

[kancell]

Note: I already have made sure the Pitot line is connected to the middle port of the ADAHRS and checked for blockage or kinks. I haven't made it out to the airport yet to try the balloon and finger press test suggestions.