on failure, front cylinder engine tracks backwards, separates in half (separates from the
top, bottom held by joints) and splits to fall on the ground.
then the second cylinder engine moves up taking its place.
on front cylinder engine failure, secondary engines should start before
it the front one falling, holding the plane in air.
but enough distance to the first cylinder, so the smoke and debris
minimally affects the secondary.
or is this wishful thinking? hahaha
in any case, when all engines fail, best to evacuate passenger cylinders...