0TreeLemur

I'm looking at reconfiguring my Avidyne AXP-340 xponder. The isntallation manual says "The Mode S Address is a 24 bit number issued to the aircraft by the registration authority for the aircraft. These addresses are usually written as a 6 digit hexadecimal number," I guess I can use the same one? Does anyone know? I looked at the FAA "assignment of special registration numbers" form that they sent me, and it makes no mention of that.

Matt at Engravers.net quoted me $10. Told him to proceed. It will meet or exceed my specs.

I bought two a couple of years ago from Maxwell.

Ok. I'll contact him. Thx.

Gimme a break. I haven't got to that yet! I used 2K paint, which is supposed to cure for 20-30 days before cutting/polishiing. I can't paint the shadow until after that step.

yes, but they don't have letters 0.4" tall.

I've got a Brother labelmaker that's nicer than that - But I want an engraved label that is 2" wide, 3/4" high with letters 0.4" tall. Thickness 0.025" - 0.05". White letters on matte black finish.

I found them online. I ordered something from them before. Good company. But, I just need a little 2" x 3/4" engraved label with a sticky back. Probably cost $3.00 from the right place. A place with "Aircraft" in their name will probably be 10 times that...

Took the paper and tape off after work. Ta-da!

Changing tail number on airplane. Need new engraved plastic label for panel. Anyone know a place that makes such things? Thx.

Last fall I reserved N201Y. The FAA approved the change so I spent today painting white where I'd sanded off portions of a "2". My J had N202Y, which is ok, but kind of like a vanity plate that just doesn't quite make sense. Tomorrow I paint the blue portions of the "1".

Beg to differ. I like mine on the co-pilot's yoke.

For incompressible flow (M<0.3), streamline curvature explains >95% of the pressure distribution on an airfoil, with viscosity (vorticity) playing a minor role. Downwash has very little to do with lift produced by a wing. Lift results from either angle of attack and/or asymmetry in the airfoil itself. An asymmetric airfoil like the one on our favorite airplane in normal cruise has 0-degree angle of attack! How much downwash do you think that is that causing? As Skip pointed out in the wind tunnel photo above, which is a symmetrical airfoil at a high angle of attack, the net vertical velocity component around it very nearly zero. In the case of a symmetric airfoil at 0-degree angle of attack, the lift is zero because the streamline curvature is the same on both upper and lower surfaces. But as the wind tunnel photo shows, angle of attack greatly modifies the flow field and results in a lot more streamline curvature above the airfoil than below it. That's all there is to it. No magic. Once you get into the compressible flow regime, then the magic starts to appear along with a few demons.

One of my favorite views of lift generation in action. Streaklines in a wind tunnel at an angle of attack near stall. Newton's second law F=ma written perpendicular to the streamlines does a better job of describing the physics that produces lift better than any other equation. It clearly shows that streamline curvature produces a pressure gradient in the direction opposite of the radius of curvature. The minus sign indicates that the pressure decreases in the direction pointing towards the center of curvature, the n direction on the figure. The wind tunnel observation also shows why our stall detectors are placed where they are.

By coincidence I tried this exact test just Sunday. I had a turn of 290 degrees programmed in the IFD540 just to see what it would do. I expected it to anticipate the turn. With the Aspen in GPSS mode, KFC150 A/P in HDG mode. To my surprise the IFD took me over the waypoint and turned left 290 degrees. It seems that there is still some limit in the IFD software, where beyond a certain angle it requires a flyover. Good to know. I tried again and anticipated the turn using the heading bug in non-GPSS mode, and that works. Threads from the past like this one are very useful.