I'm trying to design a nose cone for a project boat that I am doing, and was wondering what the best way would be to design this cone?

Something that looks like this:

It's a 25" diameter at the bottom, 48" long from floor to tip and the radius of the knife edge is obviously compound.

I'm just trying to figure out the best way to model something like this so I can get a sheet layout off of it.

Thanks in advance!