Paul 5r4
Well Known Member
Top of the morning guys! Recently went to the uncontrolled airport where I keep the RV. I set the altimeter to the field elevation of 75 ft as always which yielded a pressure of 30.58. Later when flying I decided to tune in the Pensacola, FL ATIS to see what setting they were reporting. Pensacola is about 25 miles or so east of my home base. The altimeter setting from ATIS was 30.48 so I reset mine. Just to get a little more information I contacted Pensacola apph for a mode c altitude check. With 30.48 set in the window the controller reported me at 2000 which was my readings exactly, (on both the dynon and steam gauge altimeter). After landing back at the home field, both of my altimeter were showing an altitude of about 5 feet about sea level. I had a look in one of the FBO's cessnas to see what it's altimeter setting was for the field elevation of 75 ft. With the cessna's pressure set to 30.48 it was indicating correctly at 75 ft. Soooo, mine is off somehow. I have only one common system/line for my pitot and static system. It is VFR certified. This is something new because before it always matched. Do I need to look into the static side of the system... what could be the problem? It's always hangerd so no water in the lines. I'm thinking maybe a bug... would that cause an error like this? Both my altimeters match perfectly but for some reason they're both off about 200 feet. Thanks in advance for your input!