777 vibration on take off?
Last week as a pax, just after rotation , the a/c nose was raised on take off then followed by strong vibrations for 4-5 seconds . Climb angle remained constant. Did not think much of it , but the same occurred on the return leg ( different crew, diff tail number but same airline )
Occasionally you do have this buffet but not as strong and not as long as these 2 times. Are certain 777 models known to have this ? or is this a new "flex take off" procedure ? or this particular airline training ?
Just curious .
On both cases runway length was not an issue , nor was obstacle to clear or temperature ( One of the legs was out of SIN early morning)
On all aircraft I do fly myself, I ( and was trained to) slightly lower the nose after rotation to gain a few knots just to avoid this. Or is the margin between buffet and actual stall so big on the 777 wing that this is a non-issue ?