Open Source Car/Research Development: Difference between revisions
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These are the GVCS development steps that take place for Distributive Economics development of the GVCS tools. These 32 steps apply to each prototype of the GVCS machines, and each machine iterates through 3 prototypes prior to Full Product Release. | These are the GVCS development steps that take place for Distributive Economics development of the GVCS tools. These 32 steps apply to each prototype of the GVCS machines, and each machine iterates through 3 prototypes prior to Full Product Release. | ||
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[[Hybrid Hydraulic System]] | [[Hybrid Hydraulic System]] | ||
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Revision as of 15:40, 6 September 2011
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| Home | Research & Development | Bill of Materials | Manufacturing Instructions | User's Manual | User Reviews | 
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These are the GVCS development steps that take place for Distributive Economics development of the GVCS tools. These 32 steps apply to each prototype of the GVCS machines, and each machine iterates through 3 prototypes prior to Full Product Release.
Research
Wanted: Brief description about the highest version of the GVCSTool
Theory
Wanted: Brief paragraph regarding the reasoning behind adding this tool to the GVCS
Relevant Links
Wanted: Sources for information regarding relevant technology
Conceptual Notes
Wanted: Ifs, ands and buts.
Development
Wanted: Brief overview of the current version of the GVCSTool
Design
The basic requirements for the OS Car are: Two passenger capacity, Ultra-high fuel economy (50+ MPG, city, 100+ MPG, highway), Ultra-long range (1000+ miles), Low Cost (less than $12,000), Ease of Construction (1000 hours of construction time. Can be constructed by one person in 1000 hours with a vertical mill, band saw, disc sander, grinding wheel, air compressor, welder)
Given these requirements the basic attributes chose for the OS Car are:
- Reverse Trike Layout
The reverse trike layout was chosen because it allows for side by side seating, an aerodynamic rain drop shaped body, and safe handling. A two-wheeled vehicle with tandem seats resembling a motorcycle would have less frontal area and probably less wind drag, but would simply not be practical to drive. A four-wheeled vehicle could be made with a rain drop shaped body, but would have extra drag from the two rear wheels which would protrude from the body. The reverse trike design may seem novel, but has been used successfully for over 100 years in cars from the Egg to the Aptera. Other benefits to the reverse trike layout are lower weight and cost due to the obviation of one wheel and a differential.
- Hybrid Hydraulic Powertrain
A hybrid powertrain is a requirement for achieving high fuel efficiency in city driving in order to: 1. Exploit the low brake specific fuel consumption (BSFC) of a very small displacement engine which cannot create enough power by itself to provide sufficient acceleration of a vehicle. 2. Allow for regenerative braking where kinetic energy of the vehicle is recaptured and stored. Hybrid electric powertrains are most popular in hybrid vehicles produced by the major OEMs, but using a such a powertrain in the OS Car would require either very expensive lithium-ion batteries, or very heavy lead-acid batteries. A hybrid hydraulic powertrain would not require any batteries for energy storage and would instead use a relatively lightweight and low cost accumulator.
- Tubular Steel Space Frame
A tubular steel space frame design was chosen for the space frame because it will be lightweight, stiff, strong, relatively inexpensive, and easy to construct. Although aluminum tubing would allow for a lighter design, its cost would be unacceptably high. A composite monocoque is and alternative to a space frame design, but a monocoque would require costly molds, and would require a large amount of time and a fair amount of skill to construct.
- Requirements
- Speed
- Throughput
- Weight
- Size Constraints
- Feed stock
- Design Description
- Calculations
- Drawings and Diagrams
- Concept and Alternatives
- Full Design Views
- Cut-away Views
- Exploded Parts View
- 3D Renders
- Decisions
- Project Team
Industry Standards
| Industry Standard | Open Source CarTool |
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Funding
Wanted: List of expenses for prototyping and documenting Open Source CarTool
Peer Reviews
Wanted: Peer reviews from the scientific community regarding the R&D of Open Source CarTool
Experiments and Prototypes
Wanted: Empirical data on performance
Experimental Results
Prototype Notes, Observations, etc.
Failure Mode Analysis
Testing Results
Recommendations for Improvement
See Also
