Touchdown ROD in land report
Posted: Sun Jan 15, 2023 8:14 am
Hello!
I have a question about Touchdown ROD. It's vertical speed at touchdown. But the speed of which part of the plane? Gears, nose, wing, CG? They may differ significantly! It's really important for landing quality assessment!
For example, the plane is landing. Altitude is 5ft, vertical speed(on variometer) is -100ft/min. Pitch is 5 degrees. Smooth landing expected.
Then pilot wants to increase pitch slightly by sidestick. Plane is rotating immediately. Vertical speed hasn't changed much, but nose is moving up, gears is moving down! Vertical speed of gears at touchdown will be "variometer+rotate speed"! It may be 100+200=300ft/min, only "positive landing"...
I have a question about Touchdown ROD. It's vertical speed at touchdown. But the speed of which part of the plane? Gears, nose, wing, CG? They may differ significantly! It's really important for landing quality assessment!
For example, the plane is landing. Altitude is 5ft, vertical speed(on variometer) is -100ft/min. Pitch is 5 degrees. Smooth landing expected.
Then pilot wants to increase pitch slightly by sidestick. Plane is rotating immediately. Vertical speed hasn't changed much, but nose is moving up, gears is moving down! Vertical speed of gears at touchdown will be "variometer+rotate speed"! It may be 100+200=300ft/min, only "positive landing"...