Download
1 / 49
830 likes | 1.83k Views
RC Airplane. Robert Schuld Aakash Soni Alan Strimbu. Table of Contents. Timeline Gantt Chart Problem Statement Background Customer Scope Customer Requirements Deliverables Brainstorming Research Identify Criteria & Constraints Explore Possibilities Pros and Cons
E N D
RC Airplane Robert Schuld Aakash Soni Alan Strimbu
Table of Contents • Timeline • Gantt Chart • Problem Statement • Background • Customer • Scope • Customer Requirements • Deliverables • Brainstorming • Research • Identify Criteria & Constraints • Explore Possibilities • Pros and Cons • Select an Approach • CAD • Bill of Material • Build Process • Test Criteria • Test Plan • Prototype • Test Results • Lessons Learned • Summary
Problem Statement • Students lack proficiency in Engineering • By creating an RC airplane: • Gain knowledge • Gain experience for college environment
Background • Gain knowledge in Aeronautics and Material Sciences • Implement calculus and physics for advanced calculations • Recognize properties of different materials – balsa wood, foam, etc.
Customer • Mr. Pritchard • Mrs. Brandner
Scope • Create RC airplane to takeoff, fly, and land • Consist of fuselage, wings, motor, servos • Documented in engineering notebook • Presented in technical report and Powerpoint presentation
Scope (cont’d) • Experts • Mr. Pritchard • Mrs. Brandner • Mr. Cotie • Built of balsa wood and foam • Held together with various glues • Create lightest prototype as possible
Scope (cont’d) • Requirements • 12-step design process • Strength tests • Cost estimates • CAD drawings • Data for 3 diff. materials • Calculations for plane (thrust, drag, lift)
Scope (cont’d) • Expected cost to be $100 • Limitations with various clubs and sports
Customer Requirements • Mr. Pritchard • 3 tests on 3 different materials • Strength test on material/prototype • Mrs. Brandner • Complex calculations using physics and calculus • Submit engineering notebook • Additional • Must fit in technology room • Must be tested outside school property
Deliverables • Mr. Pritchard • RC Airplane prototype • Final Report • Design Notebook(s) • Powerpoint Presentation • Mrs. Brandner • Calculations
Brainstorming • Construction • What building materials will be used? • What bonding materials will be used? • What prefabricated materials will be used? • What tools will be used?
Brainstorming (cont’d) • Plane characteristics • How will the airplane be powered? • How will the airplane be maneuvered? • What weather conditions are required to fly the plane? • What wing structure will be used? • What aesthetics will we consider? • What is the optimal center of gravity?
Brainstorming (cont’d) • Testing • Where will we fly the airplane? • What if the airplane crashes? • Will we need permission to fly the airplane? • How will we test the airplane?
Research • Looked heavily into materials • Balsa vs. Basswood • Foam vs. Metal vs. Fiberglass • Structure of plane • Skeleton build with thin covering • Solid build
Research (cont’d) • Motor types • Electric, nitro engine, jet engine • Servos • Move surfaces of plane • Provide turning capabilities • Propeller/Landing gear • Propeller needs to fit with motor • Proper size wheels
Research (cont’d) • Plane channels • Ailerons for roll • Elevators for pitch • Throttle for speed • Rudder for yaw • Electronic Speed Controller (ESC) • 3-channel system most practical
Research (cont’d) • Wing position • High, mid, and low-wing • High is most stable and easiest to fly • Tail • V-tail and T-tail • T-tails better with low speeds for control • Transmitter • Prefabricated at 72 MHz frequency band
Identify Criteria & Constraints • Criteria • Applications of Calculus • Calculations for d(t), v(t), a(t) • Calculations for lift force • Calculations for engine torque • Calculations for thrust • Calculations for types of materials • Optimization with different materials and structures • Submit engineering notebooks
Identify Criteria & Constraints • Criteria • Applications of Technology • Application of the 12 step design process • Testing procedures for different types of materials and their strengths • Submit final report and Power Point • Submit airplane prototype • Submit CAD drawings
Identify Criteria & Constraints • Criteria • Control Panels • Flying tests must be outside school property • Constraints • Must fit inside technology room • 3 ft. wingspan for detail, but not too large
Pros and Cons (cont’d) • T-tail best choice • Aerodynamics • Cleaner airflow
Pros and Cons (cont’d) • High wing best choice • Easiest to fly/build • Stable • Makes sustained flight easiest to attain • Acrobatics not necessary
Select an Approach High I M P A C T Low Low High Effort
Build Process • Part A • Layer four sheets of EPS foam on top of each other. • Use four very thin dowel rods or four vise grips and stick it through all four layers in each of the four corners of the stack in order to hold it in place. • Using a Sharpie, mark a rectangle that is 4” x 23” on the top of the stack. • Using a hot wire, carve out the resulting box.
Build Process (cont’d) • Remove the cut out pieces. • Clamp these four pieces together so that all of the edges are flush. • Using a box cutter, shave out the shape of the fuselage. • Remove the vise grips and glue the four sheets together. • Sand Part A so that it is smooth.
Build Process (cont’d) • Part B • Obtain one sheet of EPS foam. • Using a Sharpie, trace the side of Part B on the end of the foam sheet. • Using a hot wire, trace this line and cut out the shape of Part B.
Test Criteria • Test Criteria for Prototype • Safety • Functionality (in air/on ground) • Ease of use • Aerodynamics • Velocity • Weight/Size • Strength
Test Criteria • Test Criteria for Materials • Foam • Strength • Safety • Compression/Tension • Flexibility • Weatherability (ability to withstand outdoor conditions)
Test Criteria • Test Criteria for Materials • Adhesive • Weatherability • Holding strength • Drying time • Motor/Propeller • Thrust • Torque • Voltage (if necessary) • Weatherability • Weight/Size • Functionality
