Gengis,
Nice answer, may I expand for a laugh?
To make the landing public transport legal you would have to reduce the landing distance by 23%. According to the 152 POH that I saw, I remember a 10% reduction in landing distance per 9kt HWC. I asume that this is the reason for Oka asking about R31 in the first place. So to get that reduction in landing distance, lets factor in enough headwind to get the 23% reduction:
so 2.3*9 = 21kt.
Now the
CAA safety sense leaflet says that you may only use a half of the headwind component for landing distance performance corrections. So we must factor the minimum HWC:
21 * 2 = 42kt HWC.
For a POH approach speed of 54kt, that gives a ground speed of 12kt. I wager the ground roll in these circumstances may be around 20m? (or 4% of the LDA)
Love numbers!
ps. If anyone out there approaches an airfield with a 42 kt HWC at 54Kt indicated, could you contact me first so I can:
1. Get the AAIB on site to record the crash
2. Call the fire service for you...
3. Clear the undershoot so no innocent parties are hurt!
Be safe! Never do anything in this game you couldn't explain to your mum, and then a judge.