Make it Fly PPT By: James Davis
Mar 16, 2016
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