That's good as far as it goes. Remember you're dealing with a 3D shape. Here's what happens when you put a teardrop over a Beetle (the only examples I have
):
Two blisters added to the teardop would cover the roof areas, but look what happens below the doors.
This is what I have on Mair. I think it's ambiguous. Is
l the distance to the change from curved to straight or to the truncation?
In any case whereas the teardrop has a constantly changing tangent, Mair was making torpedoes with a henispherical nose cap, and arbitrary body length (it could be a train), and a tail end that goes conical when it reaches 22°.
Good luck with the tests.