What+I+think+to+change+planes

At the beginning of exhibition I thought to make planes safer is the the engines could move on planes for more control and it is true. I still think the same for the moving engines because with the engines moving the pilot can have more control. I think that plane engineers could make a second pair of engines so when the first pair break the second pair can replace the first. I would put The second pair of engines on the far side of the plane wing.