When learning to fly I was told to stick to a particular 1.3Vs, which worked well in a C152 with full tanks and two up.
But i discovered to my horror that using that same speed when i was solo and with say 1/2 tanks led to me floating like a dinghy
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Andrewc
The aim of a good landing is to touch down just above the stall (at least in the spamcans i fly)
If your stall speed at MLW is 50kts(1.3 VS=65kts) then you will have to bleed off 15kts in the flare
But if your stall speed at your reduced weight is 45 kts (1.3 Vs=58kts) and you approch at 65 kts the you'll have to bleed off 20kts (instead of 13kts) in the flare. And its the extra 7kts thatwill cause you float.
I'm suprised schools dont highlight this fact ( rather than telling people to stick to a mgic number) considering the number AAIB/NTSB reports i've read in my relatively short aviation 'career'.
But what do i know? i'm a college dropout.hope i answered your question though.