WEdgar
AP; IA
During climb at 500'/Minute at about 100Kts the D10A digital altitude lags 300 to 400 feet, is this an installation error or a hardware issue or a software issue?
D10A Altitude Error
- Thread starter WEdgar
- Start date
WEdgar
AP; IA
Lags a certified altimeter and waas Garmin430 and ATC radar
The software responds nearly instantly, so you wouldn't see that amount of lag from the EFIS itself. If, when you're level, your EFIS matches your barometric altimeter, you likely have a restriction in your static port or plumbing that is preventing the outside pressure from equalizing at the instrument quickly.
WEdgar
AP; IA
"The software responds nearly instantly, so you wouldn't see that amount of lag from the EFIS itself."
How much lag would you expect to see in feet?
"If, when you're level"
How long are you intending on being level?
"your EFIS matches your barometric altimeter"
I would expect this should almost always be the case, as they are both comparing the StaticPressure to the BarometricPressure set in the instruments.
"restriction ...preventing the outside pressure from equalizing at the instrument quickly"
The BaromtricAltimeter responds INSTANTLY, logically a restriction in the D10A plumbing would lengthen the time to for the D10A to equal the Altimeter ?
How much lag would you expect to see in feet?
"If, when you're level"
How long are you intending on being level?
"your EFIS matches your barometric altimeter"
I would expect this should almost always be the case, as they are both comparing the StaticPressure to the BarometricPressure set in the instruments.
"restriction ...preventing the outside pressure from equalizing at the instrument quickly"
The BaromtricAltimeter responds INSTANTLY, logically a restriction in the D10A plumbing would lengthen the time to for the D10A to equal the Altimeter ?
You are seeing a lag in altitude in dynamic situations. What I'm trying to discern first is whether or not you have an offset issue or a "lag" issues.
Let me ask the question a different way. When you are holding an altitude - in other words not climbing or descending - does your barometric altimeter match the EFIS, or are they hundreds of feet off?
Then, let's say you descent 2000 feet at 500fpm, how do the two altimeters compare 1) when you have descended 1000 feet and are still descending 2) As you level off 200 feet lower, and 3) After you have stabilized at your new lower altitude, without climbing or descending any further.
Even better, can you take a video of the behavior and send it to us at support at dynonavionics dot com?
Let me ask the question a different way. When you are holding an altitude - in other words not climbing or descending - does your barometric altimeter match the EFIS, or are they hundreds of feet off?
Then, let's say you descent 2000 feet at 500fpm, how do the two altimeters compare 1) when you have descended 1000 feet and are still descending 2) As you level off 200 feet lower, and 3) After you have stabilized at your new lower altitude, without climbing or descending any further.
Even better, can you take a video of the behavior and send it to us at support at dynonavionics dot com?