Solid Model of A-Arms

CAD designs and drawings have been made for the A-arms. (subject to change with the addition of final dimensions)

Updated Gantt Chart

Click here to view Gantt Chart.

Updated PDS

Critical decisions

This week the team made a few critical decisions. With an updated gantt chart, the team realized they're were behind schedule therefore the following decisions were made.

1. Round tuning was thrown out and square tubing was chosen
   
   1.5 x 2 inch
2. Created a buying list for the following items:

• Wheels
• Brakes
• Tires
• Shock absorber
• Tie-rods

For the coming week, the teams plans to have items on the buying list on order by no later than Monday (Sept 16, 2013)

First Meeting of the 2nd Semester

The team met to discuss future plans on the mushing cart's construction as well as revisited the work that was done before the summer. With each individual teammate having a different schedule during the summer, a lot of scheduled items were pushed back. Therefore the team brought up topics that needed to be completed in order to get the building process in motion.

The team decided focus on the items that need to be purchased. A few items that will be purchased are:

• Wheels & Tires*

• Disc Brakes*

• Shock Absorbers*

*Items pictured may not be used in the final product.

Action Items

	Action Items: Entire Project		5/5/2013
	Task	Status	Lead
Sketch
	dimensions configured	DONE	all
	components chosen	DONE	all
	research	NA	all
Model (Solid Works)
	brake system	21-Jun	Ashley
	shock system	21-Jun	Jose
	steering system	21-Jun	Ryan
	frame	21-Jun	Lauren, Rochelle
	entire assembly	28-Jun
Analysis
	tubing	14-Jun	Lauren, Rochelle
	frame	21-Jun	Lauren, Rochelle
	entire assembly	28-Jun
Budget
	configure budget	DONE	all
generate parts list
	brake system	12-Jul	Ashley
	shock system	12-Jul	Jose
	steering system	12-Jul	Ryan
	frame	12-Jul	Lauren, Rochelle
get quotes for material
	brake system	26-Jul	Ashley
	shock system	26-Jul	Jose
	steering system	26-Jul	Ryan
	frame	26-Jul	Lauren, Rochelle
	fundraisers	TBD	all
	distribute funds	2-Aug
	generate Pos	16-Aug
Buy All Needed Parts
	brake system	30-Aug	Ashley
	shock system	30-Aug	Jose
	steering system	30-Aug	Ryan
	frame	30-Aug	Lauren, Rochelle
Assembly
Frame
	generate a machining plan	30-Aug
	machine all necessary parts	4-Oct
	Weld all necessary components	1-Nov
Steering
	machine all necessary parts	4-Oct
	assemble components	1-Nov
	integrate into final assembly	22-Nov
Brake System
	machine all necessary parts	4-Oct
	Assemble components	1-Nov
	Integrate into final assembly	22-Nov
Shock System
	machine all necessary parts	4-Oct
	assemble components	1-Nov
	integrate into final assembly	22-Nov
Final Assembly
	integrate all components together	22-Nov
	integrate collapsibility	22-Nov
	check for safety measures	22-Nov
Assembly Testing and Analysis
	define testing procedures	22-Nov
	run tests	6-Dec
	analyze test results	13-Dec
Final Report
	generate report	20-Dec	Rochelle
	generate presentation	20-Dec	Rochelle

Proposed Designs

The most completed system of the final design is the chassis.  It will be made out of 6061-T6 aluminum round tubing. A couple different diameters will be used to accommodate the different amounts of strength needed in each area, while remaining somewhat standardized. 

                The structure of the suspension will be made of hollow steel tie rods and will use rear bicycle shocks as the shock absorbers.  The specific lengths of the tie rods and the load capacity of the shock absorbers still need to be determined.

The steering system will also be comprised primarily of tie rods as well.  They form a four bar linkage to transfer rotation from bicycle handlebars in the back to the front.  At the front the front bar of the linkage will be connected to the wheel mounts.  Exact dimensions must be calculated to acquire the desired turning radius.

                The wheels and braking system will be primarily purchased.  The brakes will include a hydraulic disk brake on each wheel as well as a “digger” brake. 

                The collapsible portion of the cart still must be designed.  The primary function of this portion is to support the steering handlebars and provide something for the passenger to hold onto.  This will likely be made of some form of lightweight tubing, but dimensions and materials are yet to be determined.