Likus Engineering Group Georgia Institute of Technology ME June 2000 Gwyneth Smith Philip Reale Matthew Berrell Justin Disney Lisa Smith Anthony Godfrey

Presentation Overview Most Viable System Motor Alternatives –Type –Power Source Frame Alternatives Pulley System Carriage System Frame Attachment

Most Viable System Overall View - 3 StoriesDetail View - Underside Winch Motor Adjustable Frame

Most Viable System Incorporates the Following: –DC Winch Motor –Custom Fabricated, Adjustable Frame –Dual Drive Pulley System –Multiple Lift Point Carriage –Hooks with Half Pipes Frame Attachment

Motor Selection - Type Winch Type (3 alternatives) –Pros Inexpensive Geared For Application –Cons Mainly DC powered Industrial Motor (3 alternatives) –Pros Designed for Continuous Duty –Cons Expensive Excess Capacity

Motor Selection – Power Source AC 1/3 Phase (2 alternatives) –Pros Durability Common Power Supply (single phase) –Cons Inefficient Safety (3 phase) DC (1 alternative) –Pros Adjustable Speed High Starting Torque Many Available Models –Cons Requires Rectifier Decreased Reliability

Frame Alternatives Preliminary Drawings Fixed Angle Iron FrameAdjustable Angle Iron Frame Uni-Strut Adjustable Frame with Basket

Frame Alternatives Custom Fabricated (3 alternatives) –Pros Design Specific Adjustable Inexpensive –Cons Labor intensive Pre-Fabricated (1 alter. UniStrut) –Pros Easy to Assemble –Cons Expensive

Pulley System Preliminary Drawings Two Bar System Four Pulleys Two Fixed Cables Boom CraneTrack

Pulley System Dual Drive (2 alternatives) –Pros Improved Stability & Weight Distribution –Cons Requires Power Transfer System Four Point Lift (3 alternatives) –Pros Simplicity –Cons Safety

Carriage Preliminary Drawings Two Cable Four Cable with Spacer Four Cable Four into One Deep Basket

Carriage Single Lift Point (2 alternatives) –Pros Easily Configured –Cons Safety Multiple Lift Points (3 alternatives) –Pros Stability –Cons Requires Support Structure

Frame Attachment Hooks (1 alternative) –Pros Secured in Two Axes –Cons Flexibility Half-Pipes (1 alternative) –Pros Can Be Mounted in Various Configurations –Cons Two Degrees of Freedom