istrumit
Well Known Member
I am following up on my previous comment that I always seem to have more of a tailwind than forecast, or less of headwind, by about 7 kts.
So, today I did the 3-leg test. I flew 90-360-270, with the autopilot on and dialed in. No power changes...I just let the the AP hold altitude in still air while I rotated the heading bug to the different headings in between stabilized flight.
Never did my TAS read over 165 kts...its was, in fact, steady at 165 kts. Full fuel. Myself and another adult. 5500 feet and 95 def F (on the ground - forget to check the OAT at altitude).
I have a G900X that logs everything for me, so I brought the chip home and typed the numbers into the spreadsheet that everyone (thank you) pointed me to.
The spreadsheet says 174 kts ! 9 kts faster that my TAS reads. Which is about what I thought (I was guessing 7 kts).
Thats good news ! But, now I have to figure out why its not reading correctly.
Static system is the first check.
So, today I did the 3-leg test. I flew 90-360-270, with the autopilot on and dialed in. No power changes...I just let the the AP hold altitude in still air while I rotated the heading bug to the different headings in between stabilized flight.
Never did my TAS read over 165 kts...its was, in fact, steady at 165 kts. Full fuel. Myself and another adult. 5500 feet and 95 def F (on the ground - forget to check the OAT at altitude).
I have a G900X that logs everything for me, so I brought the chip home and typed the numbers into the spreadsheet that everyone (thank you) pointed me to.
The spreadsheet says 174 kts ! 9 kts faster that my TAS reads. Which is about what I thought (I was guessing 7 kts).
Thats good news ! But, now I have to figure out why its not reading correctly.
Static system is the first check.