Airfoil Knot Tail 
Pilot Institute
JULY 11, 2025
Since it’s a ratio, it doesn’t matter if you measure speed in knots, miles per hour, or meters per second. At sea level on a standard day (15 °C or 59 °F), sound travels about 661 knots (approximately 761 mph or 1,225 km/h). Here, Mach 1 is roughly 573 knots (about 659 mph). The Mach value stays the same.
Pilot Institute
MARCH 28, 2025
When air flows over the aircraft wing, the shape of the airfoil creates low pressure above the wing and relatively higher pressure below the wing. As seen from the aircrafts tail, the vortex rotates in the anti-clockwise direction on the right wingtip and the clockwise direction on the left wingtip. How Are Wingtip Vortices Formed?
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Photographic Logbook
MAY 25, 2025
I cancelled the flight to my hometown due to a combination of strong winds aloft, surface winds forecast at 20-something knots gusting to 30-something knots, and potential for IFR conditions and icing to boot. When Mike provided my tail number, the lineman said, "Oh, he literally just landed." Too many strikes. Photo by Mike K.
Vintage Aviation News
OCTOBER 18, 2024
What you do is you sit up high for takeoff and as you add power and the tail comes up almost immediately, very quickly. “I started to make a normal landing, but as I was getting ready to touch down, I pulled the power off and the tail just fell out from underneath me,” he said. of Great Britain, built 443 of the type.
Flying Magazine
MAY 6, 2025
It retained the classic, high-lift Clark Y airfoil, but the span of its four-position semi-Fowler flap span was extended. The tail comes off the ground to a tail-low position and the airplane flies off at about 45 knots. In 2005, a new wing became standard.
Plane and Pilot
OCTOBER 3, 2024
True, a slightly higher aspect ratio wing was desired, which in turn required a larger vertical tail and thus a little extra mass, but the size, approximately 20% larger than a Widgeon, was set. We routinely taxi at 1200 rpm due to the low spray…[we] can cruise at 10 knots” in displacement mode, something a Goose can’t do.
Plane and Pilot
DECEMBER 16, 2024
Planespotters note the F2’s separate ailerons and flaps, conventional tail. For one thing, the F2s fuselage hangs from a completely new wing with two distinct airfoil shapes. An obvious discontinuity leads to a thinner airfoil inboard. Out back, theres an entirely new tail. Well see about that. Takeoff Over 50-ft.
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