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These are the diagrams and figures used to calculate the flight of the pencil from the fire extinguisher in Season 2 Episode 10 of Orphan Black, and covered in Episode 3 of the podcast. It turns out that you can use the Projectile Motion Simulator and┬áskip all this, but then you’d miss the amusing force diagrams.

Episode 3 Diagram 1

Numbers for Calculations:

Pencil: 7″ = about 17 cm, weight = 8 grams = 128 grains, diameter = 1 cm, height = 1 cm.

Eye: 2.4 cm height, 2.1 cm length, 78% water (for density)

Brain: 14cm width, 16.7 cm length, 9.3 cm height

Fire Extinguisher: 195 PSI = 1344 kPa

Rachel Duncan = 5’7″ (with heels), distance from top of head to center of eyeball approximately 5″.

Distance between fire extinguisher to Rachel approximately 7 feet.

Angle of fire from fire extinguisher to Rachel’s eye: 14.5 degrees.

Episode 3 Diagram 2

Episode 3 Diagram 3