Comment by fh973
2 years ago
It's relevant in practice when landing against head wind. You need to have extra speed to not stall when you enter the slower air near ground.
2 years ago
It's relevant in practice when landing against head wind. You need to have extra speed to not stall when you enter the slower air near ground.
Do you mean landing with a tailwind? A headwind should allow the plane to create the same amount of lift it needs to avoid stalling at lower ground speeds.
Yes, that’s correct, but the headwind stops being so headwind-y near the ground, so your plane needs to go a bit faster to compensate for the loss of headwind-ness in the seconds before touchdown.
On the flip side you also get ground-effect when you are low to the ground where the high-pressure underneath the wing gets trapped against the ground creating a cushion of pressure increasing lift.
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