BOAC, During windshear take off precaution, B737 manual suggest to increase Vr to the "performance limited" gross weight rotation speed, not to exceed actual gross weight Vr+20 knots.
So my question here, using the RTOW I posted, you should check the OAT to get the limited gross weight? Now, you have climb limited weight and obstacle/Field limited weight. Should you consider the lowest weight of both? (Which usually be the climb limited weight in the chart I posted?)
And with the Antiskid inop, using the RTOW chart, you would use OAT to get the Obstacle/Field limited weight to remove 7950kgs. Correct?