hevansrv7a
Well Known Member
I may have installed my static ports too far forward (one whole bulkhead's distance). Or perhaps it is the fittings. I used the ones Van's provided in the kit - the ones like big pop rivets.
My IAS is quite accurate at around 90 kts, but it gets progressively higher than CAS as I speed up and is around 4 to 5 kts too high at 8000' and 200 mph.
My TAS is accurate because it is GPS calibrated. However, this could be affecting my reported density altitude a little and I'd rather not have to make all the CAS corrections by hand (The GRT only corrects TAS). My OAT is also accurate, I believe.
The instrument is a GRT Horizon and it is IFR certified. I think there is virtually no chance that the instrument is the problem.
I don't get a warning from the system about the GPS-WAAS altitude being too different from the baro altitude, but that does not rule out an error within its limit setting.
Tape in front? Tape behind? File them down? I know Paul Lipps has suggested corrections for other, similar but not identical problems.
So I am asking Paul and others to suggest how to "fix" this. Thanks.
My IAS is quite accurate at around 90 kts, but it gets progressively higher than CAS as I speed up and is around 4 to 5 kts too high at 8000' and 200 mph.
My TAS is accurate because it is GPS calibrated. However, this could be affecting my reported density altitude a little and I'd rather not have to make all the CAS corrections by hand (The GRT only corrects TAS). My OAT is also accurate, I believe.
The instrument is a GRT Horizon and it is IFR certified. I think there is virtually no chance that the instrument is the problem.
I don't get a warning from the system about the GPS-WAAS altitude being too different from the baro altitude, but that does not rule out an error within its limit setting.
Tape in front? Tape behind? File them down? I know Paul Lipps has suggested corrections for other, similar but not identical problems.
So I am asking Paul and others to suggest how to "fix" this. Thanks.