Make it Fly PPTBy: James Davis

Weight (W)

Weight (W)

Lift (L)

Weight (W)

Lift (L)

Thrust (T)

Weight (W)

Lift (L)

Thrust (T)Drag (D)

Weight (W)

Lift (L)

Thrust (T)Drag (D)

A-10 Thunder Bolt Weight

Mass(m) = 13800 kg

A-10 Thunder Bolt Weight

W = ?Mass(m) = 13800 kg

W = m g ∙

A-10 Thunder Bolt Weight

Mass(m) = 13800 kg

W = m g ∙ = (13,800 kg) (9.81 m/s∙ 2)

A-10 Thunder Bolt Weight

W = m g ∙ = 135,378 kg m/s∙ 2

A-10 Thunder Bolt Weight

W = 135,378 N

A-10 Thunder Bolt Weight

W = 135,378 N

A-10 Thunder Bolt Level FlightL = ?

W = 135,378 N

A-10 Thunder Bolt Level FlightL = W

W = 135,378 N

A-10 Thunder Bolt Level FlightL = W = 135,378 N

W = 135,378 N

A-10 Thunder Bolt Level Flight (L = W)L = 135,378 N

SR-71 Blackbird Steady Flight

T = 290, 000 N

D = ?

SR-71 Blackbird Steady Flight

T = 290, 000 N

D = T

SR-71 Blackbird Steady Flight (T = D)

T = 290, 000 N

D = 290,000 N

Basic Aerodynamics

Two Sheets of Paper ( No Airflow)

Two Sheets of Paper ( No Airflow)

P = PatmP = Patm P = Patm

Two Sheets of Paper ( No Airflow)

P = PatmP = Patm P = Patm

Two Sheets of Paper (with airflow)

Two Sheets of Paper (with airflow)

P < PatmP = Patm P = Patm

Two Sheets of Paper (with airflow)

P < PatmP = Patm P = Patm

Two Sheets of Paper

P = PatmP = Patm P = Patm

P < PatmP = Patm P = Patm

No Airflow Airflow Between Sheets

(No) Airflow w/ Straw

Balanced Air Pressure

(No) Airflow w/ Straw

Balanced Air Pressure

(No) Airflow w/ Straw

Airflow w/ Straw

BlowBlow

Airflow w/ Straw

BlowBlow

Airflow w/ Straw

BlowBlow

Airflow w/ Straw

BlowBlow

Forces on our ping pong ball

Forces on our ping pong ball

Weight

Forces on our ping pong ball

Weight

Wind

Hair Dryer

Forces on our ping pong ball

Weight

Wind

Hair Dryer

Forces on our ping pong ball

Weight

Wind

Hair Dryer

Drag

Forces on our ping pong ball

Weight

Drag

Forces on our ping pong ball

WeightWindHair Dryer

Forces on our ping pong ball

WeightWindHair Dryer

Forces on our ping pong ball

WeightWindHair Dryer

Forces on our ping pong ball

WeightWindHair Dryer

Drag

Forces on our ping pong ball

WeightWindHair Dryer

Drag

Forces on our ping pong ball

WeightWindHair Dryer

Drag

Lift

Forces on our ping pong ball

WeightWindHair Dryer

Drag

Lift

Weight

Wind

Hair Dryer

Drag

Bernoulli's Principle

WindHair Dryer

P < Patm

Patm

Forces on our ping pong ball

WeightHair Dryer

Drag

Lift

Forces on our ping pong ball/ Aircraft

Hair Dryer

Forces on our ping pong ball/ Aircraft

Hair Dryer

Ruler Balancing Act

Ruler Balancing Act (No Airflow)

Ruler Balancing Act(Blowing Under)

Straw

Ruler Balancing Act(Blowing Under)

Straw

Ruler Balancing Act (Blowing Under)

Straw

Ruler Balancing Act (Blowing Over)

Straw

Fan Free Stream VelocityThe Tuffs(strings) show the direction of the free

stream velocity which changes depending on which part of the fan you are in front of.

(see next slide)

Air Velocity Direction

Perform experiments in the area of the fan circled.

Vair

Free Stream Velocity (Vair)

Vair α

Relative Angle of Attack (α)

Angle of Attack Demo

• Group Member 1: Hold the back ends of the popsicle sticks.

• Group Member 2: Hold the front ends of the popsicle sticks.

• Group Member 3: Control the Fan Speed