School of Engineering

Updates

5/14/02 Project completed. Click here.
5/06/02 The shell will no longer be used. Since individual solar cells will not be used, there is no need for the upper shell. Additionally, the pre-fabricated array fits better on the frame of the car. Since various aspects of the car design were changed during construction, the lower shell will not fit properly as initially designed, thus, it too will not be used.
5/05/02 Never received the solar cells needed to construct the solar array. It was decided to use a flexible pre-fabricated array. Click here.
5/04/02 PWM installed and tested.
5/03/02 Pulse width modulator complete. Click here.
4/20/02 Mechanical part of project is complete.
3/17/02 Suspension added to front wheels after break problem. Click here.
3/10/02 Shell cut and sanded.
3/05/02 Shell mold constructed and fiber glass applied. Click here.
2/12/02 Main drive motor purchased from Maxon Motors  (Opens in New Window); rated 150W high efficiency motor.
2/10/02 The final phase in the prototype's frame design and construction, delta-phase  (Opens in New Window), was completed. 1/4 in. 1010 mild carbon steel was used in its construction. The joints were welded using copper-coated steel as a filler. The jig used to aid in construction of delta-phase was made of 2" x 2" wood.
1/10/02 Gamma-phase completed. This phase is a wooden model of the final prototype, which has been constructed to scale. Some problems were noted with this model.
- The front end of the model was too high, thus causing a visibility issue for the driver. This fact was not readily seen in beta-phase.
- The reinforcement rods for the shell supports were deemed unnecessary in the design since the actual prototype will be built from solid steel rods.
12/15/01 Beta-phase is said to be "on the right track" by one civil engineering professor. Thus, refinement of this model was done and work began on gamma-phase.
11/03/01 Frame concept created and alpha-phase  (Opens in New Window) constructed. However, as can be seen in the picture it didn't do so well, beta-phase  (Opens in New Window) created soon there after.
09/28/01 Division of work distributed with the following assignments:

A. Mechanical Components

     a. Chassey/Framework (Mike Putnam)
     b. Aerodynamics (Hasan Bitar and Mike Putnam)
     c. Brakes (Hassan Bitar)
     d. Suspension/Shocks (Mike Putnam)
     e. Steering (Mark Galicia)
     f. Wheels/Tires (Hassan Bitar)
     g. Drive-train (Mike Putnam)
     h. Cooling (Mark Galicia)
     i. Cockpit Accommodation and Visibility Issues (Mark Galicia)

B. Electrical Components

     a.Motor Sizing (Ricardo Sfeir)
     b.Solar Panels (Ricardo Sfeir)
     c.Batteries (Ricardo Sfeir)
     d.Telemetry (Chris Lee)
     e.Charging Strategies (EEs)
     f.Solar Cell Array Strategies (Ricardo Sfeir)
     g.Internal Wiring (EEs)
     h.Remote Control (Chris Lee)
     i.DC/DC Conversion (Chris Lee)
     h.Battery Charger (Ricardo Sfeir)

09/01/01 The team was created and project approved by faculty. The project deliverables were a fully functional 1/4 scale prototype and a complete design for the full scalecar.
SF State Home