engineering 339 – senior design

TEAM 1: ON WINGS LIKE A PENGUIN

ENGINEERING 339 – SENIOR DESIGN

• Build an amphibious air cushion vehicle• Should seat two passengers• Two engines: one for thrust, another for

lift.• Approximately 12 x 6 ft, triangular shape• Lift engine will duct air into skirt using air

splitters

Project Description

Design Requirements• Approximately 6.5 horsepower lift engine• Approximately 13 horsepower thrust engine• 26 inch diameter lift fan• 48 inch diameter thrust propeller• Hull will be constructed of extruded polystyrene

foam and marine plywood• Fiberglass coating on outer hull and ducts• Cable-controlled throttle• Be able to support 400 pound payload

Budget Analysis

COST ESTIMATION - bold signifies a verified price

Item Size Quantity Low Price High Price

Horizontal engine 13 HP 1 $300.00 $345.00

Vertical engine 6.5 HP 1 $0.00 $160.00

XPS foam 2" x 4' x 8' 6 $103.74 $126.00

XPS foam 1" x 4' x 8' 1 $9.88 $15.72

Marine plywood 1/8" x 4' x 8' 6 $160.80 $176.10

Epoxy kit 1.0 gallons 2 $175.98 $240.00

Fiberglass cloth (6 oz) 38" x 1 yd 10 $50.00 $91.90

Skirt (18 oz vinyl nylon) 60" x 1 yd 8 $79.60 $103.60

Skirt screws 3/4" 300 $8.95 $12.95

Skirt glue HH-66 1 pint 1 $14.95 $16.95

Spray can foam 12 oz 4 $22.40 $23.40

Thrust propeller 48" - 17° 1 $38.58 $268.95

Lift fan 26" - 16° 1 $25.72 $258.95

Other materials N/A $250.00 $350.00

TOTALS $1040.60 $2139.52

Schedule September October November December

WEEK 1 2 3 4 1 2 3 4 1 2 3 4 1 2

Form team

Determine project

Initial project research

Project objectives defined

PPFS Outline - Table of Contents

Oral presentation

In-depth design analysis

Project website and sign

Material sourcing and cost estimation

Project brief

Determine final specifications

Complete Autodesk model

Finalize budget

Draft PPFS

Oral presentation

Final PPFS

Current Phase• Defining budget (with contingencies)• Sourcing materials• Determining thrust propeller and lift

fan specifications• Working on Autodesk model

Questions?

Lift Fan Design• 26 in. fan diameter• Four blade design• Constructed out of three 1 in. thick

pine boards• Blades with varied “angle of attack”

for maximum efficiency

Lift Fan Angle of Attack

Thrust Propeller Design• 48 in. propeller diameter• Two blade design• Constructed out of five 1 in. thick

pine boards• Blades with varied “angle of attack”

for maximum efficiency• Analyzed to confirm ideal operation

Propeller Analysis

Propeller Angle of Attack

Craft Balance Issues• Center of gravity will be determined

using Autodesk Inventor• Components will be placed

strategically to balance craft• Weights will be added for static

balance if necessary

Duct Construction• Thrust duct will be constructed by

cutting polystyrene sheets at a large radius

• Duct will then be wrapped and glued into final shape, and sanded

• Lift duct will be built into hull, using marine plywood