Originally Posted by
172_driver
It's almost funny. The B737 FCTM has the following two sentences about the scenario discussed, that GSmini is supposed to handle:
When using the autothrottle, position command speed to VREF+5 knots. Sufficient wind and gust protection is available with the autothrottle connected because the autothrottle is designed to adjust thrust rapidly when the airspeed drops below commanded speed while reducing thrust slowly when the airspeed exceeds commanded speed. In turbulence, the result is that average thrust is higher then necessary to maintain command speed. This results in an average speed exceeding command speed.
That's it folks, Vref+5
Not so easy. B737 800 Vapp for 63 ton Flaps 30, 146kt. which is 8kts higher than A320 flap3. Boeing Autothrottle switched off with AP. And Boeing speed additives are not just 5kts but half wind+Full gust. i.e. for surface wind of 20kts gusting to 30kts is 10+10=20kts. Out of that the steady half wind needs to be bled off approaching flare which rarely anybody does.