Group 13 Heavy Lift Cargo Plane
Stephen McNultyRichard-Marc Hernandez
Jessica PisanoYoosuk Kee
Chi Yan
Project Advisor: Siva Thangam
Overview• Objectives • Schedule• Design Concept Summary • Construction
– Wing– Fuselage– Tail– Landing Gear– Boom
• Testing• Problems/Suggestions• Competition Goals• Website
Objectives• The plane meets the specifications of the 2004 SAE
Aero Design West competition• To complete construction by mid April to allow time for
testing and modifications• To compete well at competition and improve Stevens
reputation• For the team to improve and expand their knowledge of
the design and construction of airplanes
Design Specifications• Minimum allowed wingspan
120 inches• Takeoff limit
200 feet• Landing Distance
400 feet• Minimum cargo area
6 in x 5 in x 4 in• Engine
– unmodified FX O.S. 2 stroke motor
– 0.61 cubic inches– 1.9 hp– E-4010 muffler
Design Specs ComparisonDesign Specifications: This Year (2004) Previous Year (2003)
Wing Span Minimum 10 ft Maximum 6 ft
Wing Chord No restriction Maximum 1 ft
Cargo Volume Minimum 120 in3 Minimum 300 in3
Maximum Takeoff Distance 200 ft 200 ft
Maximum Landing Distance 400 ft 400 ft
Engine .61 FX-OS .61 FX-OS orK&B .61 R/C ABC
Battery Minimum 500 mAh Minimum 500 mAh
Schedule 2nd Semester
Schedule 1st Semester
Calculation Achievements• Calculation of every component completed• Equations and resources from:
– textbooks– online researching– white paper (Provided by SAE)
• Calculations done with Excel Spreadsheet– Easy to link one value to another– Graphs were easy to compare which design is more efficient– Change around numbers
• compare which aircraft design performs best upon constructing and testing
• Results used in selection of airfoil, wing shape, and tail stabilizer
• Calculations of Landing and Take-off
Sample EquationsLanding Run Distance
• Differential Equation of Motion
• Landing ground runway
• Coefficients A and B
• Stall Velocity
2sec/966.0 ftCWTgA rollingstatic
2BVAVdVdS
21ln
21
TDlanding VAB
BS
gLrollinggDp CCCA
WgB ,,21
sec/8494.25
21
21
max,
ftCA
WVLp
stall
Sample Excel CalculationsHorizontal tail: Vertical Tail:
Re (NACA 0012) 175975.6 Re (NACA0012) 246365.9
chord (MAC) 7 in chord (MAC) 9.8 in
Swet 0 in^2 Swet 189 in^2
Wing Span 40 in Tail height 24 in
Sref 280 in^2 Sref 235.2 in
Clmax 0 Clmax
Cf (laminar) 0.003166 Cf (laminar) 0.002675
t/c 0.12 t/c 0.12
x/c 0.287 x/c 0.287
FF 1.271607 FF 1.271607
Cdmin (laminar) 0 Cdmin (laminar) 0.0027339
Payload Weight vs. Density Altitude
Payload Weight vs. Density Altitude
20
20.1
20.2
20.3
20.4
20.5
20.6
20.7
0 200 400 600 800 1000 1200
Density Altitude [ft]
Payl
oad
Wei
ght [
lds]
[Payload Weight] = 20.60 – 5.15E-4 × [Density Altitude]
Wing Design and Construction
Rib
•Print and cut original
•Metal cut out template
•Final for placement in wing
•Selig 1223•SolidWorks Drawing
Airfoil
• Airfoil selection– Year 2000: E 211– Year 2001: E 423– Year 2002: OAF 102– Research: E 214– Research: S 1223
Important Factor
E122
E214
E423
OA
F102
S1223
Cl 5 1 2 2 3 5
Cd 2 5 4 4 3 2
Construction 3 5 5 4 4 3
Overall 50 30 33 30 33 38
CL&CD
vs.AoA Coefficient of Lift
0
0.5
1
1.5
2
2.5
3
3.5
-5 0 5 10 15
angel of attack
coef
ficie
nt o
f lift
No Flaps Flaps +15 Flaps -15
Coefficient of Drag
0
0.02
0.04
0.06
0.08
0.1
0.12
-5 0 5 10 15
angle of attack
coef
ficie
nt o
f dra
g
No Flaps Flaps +15 Flaps -15
Control Surface Affect
Wing Stress Analysis
Max stress = 330.9 psi
Wing• 10 ft wing span • 1 ft cord• Flap 3 ft
Fuselage• Shortened to 2’-1” long• Made from plywood and
balsa wood• Attached to boom
externally New design
Old design
BoomThree Spar
•Connects tail to fuselage •Two Booms create wobble•Carbon Fiber •5ft length•½ in inner Diameter
Tail Section
• NACA 0012 Airfoil• Similar Construction to Wing• Controls:
– Horizontal Stabilizer– Vertical Flaps
Tail Section
• Wooden Beam to Carbon Fiber Attachment• Design Limits tail AoA• Servos built inside tails
Landing Gear Analysis• SolidWorks models
– Deflection Analysis– Stress Analysis– Deformation Analysis
• Top fixed• Force applied to bottom of
legs– Force applied = 45lbs– Force = Weight of plane
•Max Deflection .0196 in•Stress Max 1.651 Psi
Final Plane
Budget Item Company Name Unit Price Quantity Total Price
1 Pro CA+ Glue Tower Hobbies 11.99 3 35.97
2 Balsa Sheet Tower Hobbies 11.99 3 35.97
3 Fuel Filter Tower Hobbies 2.79 1 2.79
4 Carbon Fiber Tubing GraphiteStore.com 47.60 2 95.20
5 RX NICD Battery Tower Hobbies 18.39 1 18.39
6 Monocot Tower Hobbies 9.99 4 39.96
7 Glow Plug #8 Tower Hobbies 5.49 1 5.49
8 Aircraft Plywood Ridgefield Hobby 12.45 1 12.45
9 Light Plywood Ridgefield Hobby 5.00 2 10.00
10 Wooden Dowels Ridgefield Hobby 5.75 1 5.75
11 Balsa Bars Ridgefield Hobby 9.75 1 9.75
12 Nose Cone America's Hobby Center 6.40 1 6.40
13 Nuts, Bolts, Screws Home Depot 10.43 1 10.43
Subtotal 288.55
14 Engine .61FX w/ Muffler Tower Hobbies 144.99 1 144.99
15 RealFlight Simulator Tower Hobbies 199.98 1 199.98
Total 633.52
Testing
Problems/Suggestions
• Design Changes– Have to alter design somewhat once
construction is started• Construction vs. Drawings• Attachments
Goals
• Compete in June
Website
Summary• Objectives • Schedule• Design Concept Summary • Construction
– Wing– Fuselage– Tail– Landing Gear– Boom
• Testing• Problems/Suggestions• Competition Goals• Website