B737 Crosswind take off technique
737NG PF used full control wheel application at start of take off run with 20 knot crosswind comp. Leaves full wheel on and nearing 120 knots the aircraft acceleration slows significantly resulting in obvious performance degradation and V1 now invalid. Obviously a case of spoilers being more effective as speed increases.
While Boeing state that only very small increase will occur in TOD even with extreme crosswind components providing correct lateral and directional input applied, there is little current FCTM amplification on definition of correct input.
A 1976 version 737-200 FCTM has a diagram showing that at 40 knot crosswind only 34 degrees control wheel deflection is needed as against 80 degrees available. In other words a little over one third wheel deflection.
From this, one could assume that no lateral input is required on a crosswind take off until the maximum crosswind limit is approached? I have often noticed that pilots wind the wheel well down into any crosswind above 10 knots. Is this really necessary or a waste of effort?