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But... I was in the half a ball out, right wing down condition with the faster 120+ KTAS speeds, as seen in the screenshots posted above.

Why would I have left yaw causing me to flip in a slip? And how do I fix it?

Worth mentioning that this issue of the right wing being slightly down in cruise is *NOT* a new thing and the plane was flying at 120+ KTAS like that before. So I don't anticipate correcting that will solve the airspeed problem. See these panel shots showing the right wing down condition while...

You are correct! You did notice something that I had not before. Well, actually it was right wing down, not left. But in cruise it flies with the right wing ever so slightly down. I do not believe this is the cause of the airspeed problem as even when I manually correct it, the airspeed does not...

Just went up and tested this. Could not get any higher airspeed regardless of where I held the rudder. I tried increments in both directions. All it did was either no change or slower, not faster.

@Jeff767 Test complete: 109/110 KTAS. TAS of the VIA GPS Calculator matches TAS on my PFD. I believe this confirms it's not an indication error and I'm definitely flying 10-15 knots slower than I was.

No carbs. Fuel injected.

Thanks, Jeff. But no, this started several weeks before the pitot-static leak test was performed. That was performed a couple of days ago by Sarasota Avionics, and by one of the best technicians they have.

The IAS on the Dynon PFD and on my standby ASI? I sure do. I take pictures of the panel every flight and when my TAS was showing 120 and IAS 102, my standby ASI was showing 102.

It's a Dynon SkyView so it's a digital indication.

Do you mean hold the rudder pedals one way or the other for 30 seconds while in cruise and see if that results in positive airspeed gain?

The airplane was flying numbers very close to book. Now the airplane flies under book speeds.

A&B is exactly my conclusion, too, and that is what I have been looking into, without success. And I have been correcting for winds aloft and also density altitude -- even checked against an E6B for density. But Jeff mentioned "winds posted by non inertial systems like the Dynon are...

By "rigging" do you mean rudder cables out of plum, or something else? Hard to believe there would be any problem with the powerplant because we have been backwards, forwards, and sideways over the engine this year.

Also, a leak in the static system wouldn't make me *ACTUALLY* fly slower. Merely make the instruments say I'm flying slower. So if the groundspeed checks and I'm *actually* flying slower, then it can't be a leak in the static system causing this problem. Right? I will conduct Jeff's True...

I agree and we've checked the connections at both ends. Something actually was kinked after the pitot tube was replaced. I wasn't getting airspeed on the takeoff roll so I aborted and we found that the static line had kinked just a couple inches above the static tube on the wing where it makes...

It was indeed connected to both the pitot tube and static tube (which is right underneath the pitot tube). There's no fuselage mounted static port on my airplane. It's just a static tube directly underneath the pitot tube. The standby ASI is non-TSO, but both Dynon ADAHRS are TSO. And all 3...

I will get the static leak fixed. But two reasons why I don't think that's the problem: 1. I seem to be actually flying 10+ knots slower, not just an instrument error. Evidenced by my groundspeed. But I'll do the calculator test Jeff suggested to verify. 2. If I had an instrument error and was...

They are all the same, indeed. I have cross-compared both ADAHRS and they agree on airspeed exactly, altitude within 60 feet, and heading within 2-3 degrees. Standby airspeed is exact to both ADAHRS. Standby altimeter is within 50 feet.

No dings or bird poop. It's an extremely clean airplane and ceramic coated. The prop is brand new and carbon fiber. The only place on the airplane I noticed a ding was towards the root of the horizontal stabilizer, but I don't see how that could have any effect.