Density Altitude Ground Effect Rudder 
Chess In the Air
JUNE 24, 2022
However, at 5:36:23 he still had an altitude of 7025 ft MSL, i.e. a normally very “safe” pattern altitude of almost 1500 ft, and prudently began to head toward the east end of the runway. At this point his ground speed was 81 kts, which – in still air – would reflect a normal pattern speed of approx.
Air Facts
SEPTEMBER 9, 2024
An incomplete summary description of FASF is whether the airplane made it out of ground effect. I think that currently, the most improvable aspects of general aviation safety likely will include improving basic flying skills including rudder usage and stall and slow flight well beyond ACS standards.
Plane and Pilot
OCTOBER 3, 2024
It was 87° F, a density altitude of 7300 feet and we ended up with four people, 120 gallons plus baggage, and we got off in 2400 feet with naturally aspirated engines. An elegantly simple rope system inside the fuselage raises and lowers the Gweduck’s water rudder mounted inside the base of the main rudder (right).
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