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.

Suspension

The current focus of the team at this moment is the suspension. The importance of the suspension is high, the team must establish a design that allow the user of the mushing cart to maneuver the vehicle safely from a rear position while all the pivoting wheels are located on the front of the cart.

After searching for ideas, the team was able to find an off-road handcycle used for extreme sports by the handicap.

Inspired by the design, the team hope to use this for their mushing cart with steering being possible from a rear position. 

Solid modeling has begun on the suspension system, and the team hopes to have those completed in the near future.

Updated WBS

Decision Making

Over the Spring break, the team met to make further decisions on the urban mushing cart. The following are possible options that we have narrowed down for the use of our chassis.

• Square vs. Round Tubing
• Thickness of material
• 4130 Alloy Steel (Chromoly) vs. 606-T6 Aluminum

Pros:

• Easier to weld

Cons:

• Load concentration areas

Pros:

• Cheap
• Widely Available

Cons:

• Harder to weld/bend

Future tasks

• Budget
• The team also spoke about funding for the cost of the material. The budget is currently $1000, but in the case that budget will be exceeded the team has determine that fundraising will be a necessity. The team has contacted fundraising coordinators at Warner Brothers Studios to attend TV show tapings in the event that more funds are needed.
  
• CAD
• A few things that the team will be working on in the following weeks is create rough CAD designs in order to get an idea of what materials will be more advantages. This task will also assist in determining what material and shape we should use when our CAD designs undergo static analysis. 

Finalizing the Design

The team set limits for components in order to prepare for narrowing the options of components in an attempt to finalize the design. Below is what the team established:

=

where,

1. Tires
2. Length of frame
3. Double barrel lever disk brakes
4. Height of frame
5. Steering
6. Suspension 
7. Digger brake
8. Hitch

The Decisions that were made were made the week of the (3/18/13) were:

• Tires
• Buy
• Size: 12-16 inches (in diameter)
• Frame (length & height)
• Build frame
• 6ft. x 3.5ft. x 3ft.(L x W x H) in approximation
• Brakes
• Buy
• Double barrel lever (disk brakes)
• On all four wheels
• Steering
• Make handlebars
• Buy handlebar grips
• Front steering
• Suspension
• Buying
• Front suspension
• Digger Brake
• Make
• Hitch
• Make
• Hook to carabiner

To be determine in the Following weeks:

With certain areas of the design still in a grey area, the team will work together to fully complete the design by establishing how the suspension will work together with the steering. The steering will also be looking into, currently the idea is to create a four-bar linkage that connect from the back to the front, in order to steer from the back. Finally the team will also finalize whether the cart will have both front and back suspension or just front suspension.

Urban Mushing Cart Visits The Team

The team gathered on campus to examine the client's own mushing cart to gather information and ideas on how to improve on their design.