Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Focus preliminary design around single speed bike
Belt-drive system for power transmission
Need to implement a large gear ratio of 75
2 different pump options but attachment design will be compatible for both: rotary vs. guzzler pump
Pump attachment system will pin to shaft near pedal to engage/disengage when traveling (bike moving) vs. pumping water (bike stationary)
Tested rotary pump and verified that it meets project deliverables agreed upon with sponsor
Guzzler pump to be tested soon
Accomplishments from Previous Week
Purchased guzzler and rotary pumps
Tested and verified performance of both pumps for design feasibility
Asked manufacturer for torque and speed curves of rotary pump
Finalized power transmission and pump attachment designs
Goals for Next Week (list names after each item). Use specific and measurable objectives.
CAD of bike - Brandon
CAD of belt drive system + rotary attachment - Dennis
CAD of guzzler pump - Kyle
CAD of rotary pump - Derek
CAD of slider-crank - Jamie
CAD Assembly - Jessica
Accumulate list of needed components - Dennis
Purchase components - Jessica
Update Webpage - Kyle
Write report - Entire team
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Meeting in person 4/25/17
Sponsor does not want OX-1 wheel to be removed --> Action: Design pump attachment to be universal with different wheel sizes
OX-1 sprocket to be lowered: lower center of gravity, safer
Consider OX-1 cart will be attached while pumping which will create more stability for rider
Bike and OX-1 cart will be dropped off next week (5/2/17) for testing
Solar pasteurization method for water: basic solution = black plastic bags?? --> Action: figure out how to utilize solar pasteurization to get potable water
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Meeting in person/through Zoom 4/27/17
Rubber bellows sold for around $10: Professor T will send links
Purchase multiple pumps and test 2-3 different types?
Best to choose drive system and design attachment to function with different pump types --> Action: design pump attachment to work with both pump options
A purchased pump will most likely be more efficient than anything we design and manufacture --> Action: purchased 2 different pumps
Could use slider crank to convert rotary to linear motion; link to bearing near pedal
Rack and pinion system will introduce significant friction; cam not necessary
Focus on belt-drive system since friction drive will be unreliable with sand/mud terrain --> Action: design belt-drive power transmission system
Can choose gear ratio to handle high or low torque conditions for different pump operating speeds
Can put pin through sprockets to engage/disengage pump --> Action: implement in pump attachment design
Need to remember to include height of bike off ground when measuring “pumping depth”
Divide and conquer project requirements & each member can give update on their task at meeting
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A
Risks and Areas of Concern
Obtaining a gear ratio of 75
Size/weight of pump + attachment system to be carried by bike
Resources or Information Required but not Available
Schedule
Proof of Concept Presentation - Wed
First Draft Report- Fri
First Draft Webpage - Fri
Budget (list amount spent and amount remaining)
$2370.52 remaining
$129.48 spent
Progress on Report and Webpage
Webpage - 30%
Report - 40%