The reason for the teardrop hull shape (aeronautical engineers developed it first - naval engineers followed suit later) is that it is extremely strong, yet streamlined enough to allow for the least resistance while traveling through their respective mediums (air and water).
Both use similar methods of control - each have a primary means of altitude/depth control (fairwater/bow planes, wing flaps), trim control (trim planes, tail flaps), and directional control (rudder).
The change to the TD hull design came with the advent of nuclear powered submarines. With increased power comes increased speed potential, and naval engineers searched for a design that would allow them greater speeds underwater. Previous boats had better speed on the surface, since they were essentially surface ships with limited submergence capability. With nuclear power, true submersibles could be built, and submerged speed was paramount. Today's submarines can go 3 times faster underwater than they can surfaced due to their hull designs.
The Bell X-1 rocket plane, which was used by Chuck Yeager to break the sound barrier in 1947, is based on a .50 caliber bullet shape, which was known by engineers of the day to be capable of breaking the barrier. All designs since then have been based on a streamlined shape.
The TD shape is also somewhat spherical in design, and as such provides for much greater strength under pressure at deeper depths. More recent designs (Seawolf, Virginia classes) have gone to a more cigar-shaped hull, which gives it even better strength at depth.
tear drop
A circle with a triangle at the top
it kinda look like a tear drop
It's not. Record drops falling in slow motion. You will see that when they gall, they actually do keep a "tear drop" shape.
it's shaped like a tear-drop
The standard of perfection for domesticated hedgehogs calls for a tear drop shape, from both top and side profiles.
Spherical to tear-drop shape. The latter is the most hydrodynamically efficient, forced by the falling drop's slipstream, with a spherical-cap nose tapering back to a pointed tail.
Tear Drop Records was created in 1960.
The tear drop lizard is native to Chad.
The Irish word for tear-drop is deoir.
A filled in tear drop means you've either killed someone, or are mourning the death of someone close to you. An unfilled tear drop means you've done some type of physical harm to someone(but didn't kill them), such as you shot them, stabbed them, burned them, etc.Gangs in the Blood Alliance(Bloods gang, Pirus gang, Brims gang) get their tear drop to the right side, while gangs in the Crip Alliance get their tear drop to the left side.Gangs in the Folk Nation get their tear drop to the right, gangs in the People Nation get their tear drop to the left.
When a tear drop is tattooed under the eye of an individual and it is not colored in it means you have spent time in prison, when this tear drop is colored usually black it means you were convicted of murder