I notice that L-1011 will start two of it engines then start taxing. I even see a Delta L-1011 at LAX
, taxi all the way to Runway 24 before it start it # 3 or 1 engine. I herd of 747 being able to taxi before it's finish it's engines start up, but every time I see one departing they start up four engines before taxi. Why L-1011 start there taxi before they finish starting up there engines?