Division: JSS Green (4-6)
School: NSU University School Team Size: 2

The Bonds


Team Information

The BMW
Car Name: The BMW
Team Name: The Bonds
School Name: NSU University School
Team Members Names: Liam M, and Sebastian L.

Design Documentation

Side View
Side View
Bottom View
Front View
Back View
Top View
Top View without Solar Panel
Señor Bond, driver of BMW (Bond Mobile, W does not stand for anything).

Project Log

DateHoursTasksObstacles EncounteredModifications to Car
3/21Thinking about design and made drawing.Hard to choose design.
3/91Got the materials and cut body and planned out where everything would go.
3/161Put together wheels, axels, and spacers. Put wheels and axel gear on car.It was challenging to get wheels straight. We used a t-square.Added wheels, axels and spacers to body.
3/231Created battery/switch/motor circuit. Attached alligator clips to motor. Attached motors and circuits to car. I tested it in the ball on battery today.Not going straight.Added battery pack, switch and motor to car.
3/301I decided how to hold up the solar panel. I added wood sides to car. Attached velcro to car and solar panel. Loosened glue and moved wheel slightly so it would go straight.
Added wood to support panel and velcro to hold panel to car.
3/311Attached guide for the guidewire. I used a piece of a binder comb. First I had it on the side then moved it under the car.I couldn’t get the height right for the side binder comb for the guidewire. I solved the problem by putting it on the bottom of the car.Added guide for guidewire.
4/61Tried the car in the sun. Realized that there is something wrong with the solar panel.Something wrong with the solar panel because it runs well on battery but slowly on panel.
4/71We replaced the solar panel. This seemed to solve the problem. We also cut down the angle of the wood supports because the solar panel wasn’t getting enough sun.The angle wasn’t allowing enough sunlight to hit the panel.Replaced the solar panel.
Changed angle of panel by cutting wood supports
4/80.5I tested the car again outside. The changes helped a lot.
4/201School competitionGoing straight but something is slowing it down a bit. Maybe friction on the guidewire.
4/211Ran car on battery.
4/240.5Tested car on battery.

Design Drawings

Design Drawing: Top of Car

Design Drawing: Bottom of Car

Finished Car Specifications

Car Size with PanelLength: 27 1/2 cmWidth: 13 1/2 cmHeight: 10 cm
Weight with Panel267 g
Wheel sizeFront wheels: 3 1/2 cmBack wheels: 3 1/2 cm
Gear Ratiomotor gear: axle gear
20 : 50 =
2 : 5

Materials Used

MaterialCost
New:
Pitsco Ray Catcher solar panel38.25
motor5.25
wheels, tires, axles, and axel gears – Solar Made accessory bag3.99
balsa wood2.31
spacers for bearings (4)0.26
rocker switch0.50
alligator clips (2)0.99
piece of black binder comb for guide wire0.07
velcro0.14
Consumables:
tape
hot glue sticks
solder

Test Results / Trial Runs

Test Runs 1 – date: 4/6/2022
Weather conditions: Partly cloudy
When the sun was out we ran on solar panel. When it was behind the clouds we ran it on battery.

Observations of results: For some reason the car is running fast on battery but slowly on panel
Any recommendations for improvements: We are going to check the wires that connect to the panel and if that doesn’t work try replacing the solar panel.
AttemptTime, sDistance, mSpeed, m/s
1 – solar panel11.5014.51.26
2 – solar panel11.9414.51.21
3 – battery5.9714.52.43
4 – battery5.4714.52.65

Test Runs 2 – date: 4/20/2022
Weather conditions: Partly cloudy
When the sun was out we ran on panel.

Observations of results: The car is running well but not as fast as before. It may be rubbing on the guide wire.
Any recommendations for improvements:
AttemptTime, sDistance, mSpeed, m/s
1 – panel9.03202.21
2 – panel8.58202.33
3 – panel7.79202.57
4 – panel8.37202.39

Test Runs 3 – date: 4/21/2022
We ran the car on battery


Observations of results: Still not running as well as before.
Any recommendations for improvements: I will have to try to figure out if there is friction someplace.
AttemptTime, sDistance, mSpeed, m/s
1 – battery8.44202.37
2 – battery7.10202.82
3 – battery8.50202.35
Test Runs 4 – date: 4/24/2022
Partly Cloudy
We ran the car on battery early around 8:30 am, then on panel around 10 am.


Observations of results: Still not running as well as before.
Any recommendations for improvements: I will have to try to figure out if there is friction someplace.
AttemptTime, sDistance, mSpeedm m/s
1 – battery8.47202.36
2 – battery7.72202.59
3 – battery7.41202.70
4 – panel9.25202.16
5 – panel8.75202.29
6 – panel8.44202.37

Vehicle Features Video


Additional Information

Original Car Plan
Electrical Schematics

One thought on “The Bonds

  • April 27, 2022 at 11:47 am
    Permalink

    The fact that you have a diagram of the circuit that is on the solar car is incredible. What a great way to tie it all together!

    Reply

Leave a Reply

Your email address will not be published.