RE: 150 meter rule.
FAI F3A Box Distance Table
Distance | Distance | Time across box
from pilot | across box | in seconds
Meters Feet | M | Ft | @60mph | @75 | @100
150 | 492 | 520 |1707 | 19.4 | 15.5 | 11.6
175 | 574 | 606 |1990 | 22.6 | 18.1 | 13.5
200 | 656 | 693 |2275 | 25.9 | 20.7 | 15.5
225 | 738 | 779 |2557 | 29.1 | 23.2 | 17.4
250 | 820 | 866 |2843 | 32.3 | 25.8 | 19.3