Project 1.1.6 Compound Machine Design

Timeframe: October 18 - October 20

Roles:
Leader - Evan Bray
Materials Specialist - Tyler Staton
Design Specialist - Chris Lang
Chief Sketcher - Mike Corbett

Summary:

+Mechanism 1 - Gear Train:
MA = [n(out) / n(in)] x [R(in) / R(out)]

MA = [(60) / (20)] x [(2.5 cm) / (1.5 cm)] = 5

+Mechanism 2 - Wheel and Axle:
MA = d(E) / d(R)

MA = 0.9π / 0.4π = 22.5

+Mechanism 3 - Pulley
MA = 1

The Mechanical Advantage of a fixed pulley is always 1.

+Mechanism 4 - Inclined Plane
MA = d(E) / d(R)

MA = (12 cm) / (8 cm) = 1.5

+Total / Overall System Mechanical Advantage
MA(1) x MA(2) x MA(3) ... x MA(n)

(5) x (22.5) x (1) x (1.5) = 168.75

Documents:

First Design:
external image photo22m.jpg


Second Design:
external image photo32m.jpg


Final Design:
external image photo42u.jpg

Conclusion:
Our group pooled all our knowledge of simple machine design to create a compound machine made up of four different kinds of simple machines. We succeeded in keeping our constraints to a minimum, and we succeeded in lifting our mass one foot. We had to make small modifications along the way, but we eventually came up with a design that gave us a large mechanical advantage of 168.75.