Blood Spatter Bluff - Google Docs

Spherical

The shape of a blood droplet in the air.

Harder, less porous surface

A type of surface that allows blood spatter to remain more intact.

Parent Drop

The original blood droplet that casts off a wave or satellite.

Passive Drop

A bloodstain formed by the force of gravity acting alone.

Point of Origin

Common area in a three-dimensional space to which the trajectories of several blood drops can be retraced.

Angle of Impact

The acute angle formed between the direction of a blood drop and the plane of the surface it strikes.

Back Spatter

Blood directed back toward the source of energy or force that caused the spatter.

Cast-off pattern

Pattern created when blood is released or thrown from a moving blood-bearing object.

Wipe pattern

A bloodstain pattern created when an object moves through an existing stain, removing it or changing its appearance.

Expirated Blood

Blood that is blown out of the nose, mouth, or a wound as a result of air pressure.

Satellite Spatter

Small droplets of blood distributed around a drop or pool of blood as a result of the blood hitting a surface.

Impact Site

The specific area where blood is deposited.

Flight path

Path of a blood drop as it moves through space.

Surface Tension

The forces that cause a liquid to assume the smallest possible shape.

Terminal velocity

The constant speed that a freely falling object eventually reaches when the resistance of the medium prevents further acceleration.

Stippling

Burns on the skin from a very close shot.

Angle at which blood droplet starts to form a tail on impact

30 degrees.

Formula for determining angle of impact

Arc sin(width/length).

What produces a high-velocity spatter pattern?

A gunshot wound.

What increases as height and velocity increase for a blood droplet?

Size and satellites.