I made effort to calculate the feat, do not make the assumption that I didn't, it can be
seen here. Your statement that the profiles "can't be changed" even though they've been deemed as incorrect by calc group members is flawed, why would we index incorrect calculations? It makes no sense, it'd be better to change it to something like the submarines weight instead of an incorrect calculation regarding the lifting strength needed to lift it.
You want me to explain it? Sure. I find it sad that my status as a former calc group member is being questioned as if I don't know how to calculate.
The submarine calculation: The drag coefficient is a property of a single, specific geometry. When you combine two shapes, you create a brand new one. The airflow over this new object is completely different from the airflow over the individual parts. Because fluid dynamics are required to be complex with non-linear equations that are impossible to solve analytically for most real. world shapes, like a submarine. The behavior of fluid dynamics and drag force is not simple, it's crazy and turbulent, with unpredictablalness that significantly effect the drag. A simple equation can't account for all the factors involved, such as the object's exact shape, surface roughness, and the flow conditions, all of which change in a non linear way. Therefore you need a bloody lab experiment.
The lightning calculation: It's impossible to calculate the total timeframe for this feat because the time the lightning takes to hit the floor is an unknown variable. formulas, like the time = distance÷speed, determine the duration of the lightning's travel from its place in where it was to the floor. However, without a value for the time the lightning spends literally hitting the floor, you can't sum the two parts of the event to get a total duration.