Easy!!
October 24, 2018
http://bit.ly/EasyCars
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Overview
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Solar powered car uses a Pitsco motor and solar cell.
EasyCar Designs
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1 and 2: Gravity Cars; 3: Bumper Car; 4: Sail Car; 5: Prop Powered Car;
6: Battery Powered Car; 7: Solar Powered Car
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On Your Mark ...
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Short sections of Raingo gutter (Slide 13) serve as ramps for down hill racing. Relative performance is determined by total distance traveled. Parameters include weight, wheel size, and car dimensions.
Self Powered EasyCars
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Sail Car
Gravity Cars
Bumper Car
Motor Driven EasyCars
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Battery Pack
Battery Pack
Pulley Driven
Propeller Driven
Wheel with integated pulley
Propeller designed in Tinkercad
Car Base: car_base.stl
Wheel1 (1X): wheel1_218.stl
Wheel1 (1X): wheel1_pulley_218.stl
Wheel2 (2X): wheel2_218.stl
O-Ring: #218 1 ½” x 1 ¼”
Car Base: car_base.stl
Wheel1 (2X): wheel1_218.stl
Wheel2 (2X): wheel2_218.stl
O-Ring: #218 1 ½” x 1 ¼”
Solar Powered EasyCar
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Pitsco Solar
Panel
Car Base: car_base.stl
Wheel1 (1X): wheel1_218.stl
Wheel1 - pulley (1X): wheel1_pulley_218.stl
Wheel2 (2X): wheel2_218.stl
O-Ring: #218 1 ½” x 1 ¼”
Sail Car
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Use low quality print setting; 10% infill for body and sails and 100% infill for wheels; assemble wheels as described on slide 17.
Length = 134 mm
Width = 45 mm
Height = 20 mm
Wheel Diameter = 41 mm
Sail Car: sail_car.stl
Wheel1 (2X): wheel1_222.stl
Wheel2 (2X): wheel2_222.stl
Sails: sails.stl
O-Ring: #222 1¾” x 1½”
Bumper Car
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Bumper Car: bumper_car.stl
Wheel1 (2X): wheel1_218.stl
Wheel2 (2X): wheel2_218.stl
Spring: bumper_car_spring.stl
O-Ring: #218 1 ½” x 1 ¼”
Orient with upper surface of car on print bed; use low quality print setting; 10% infill for body and 100% infill for wheels; assemble wheels as shown in slide 17.
Length = 134 mm
Width = 45 mm
Height = 15 mm
Wheel Diameter = 34 mm
The Bumper Car is equipped front and back with flat springs which absorb and exchange energy in keeping with the laws of conservation of energy and momentum.
VW with Bumpers
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VW with Bumpers: vw_bumpers.stl
Wheel 1 (2X): wheel1_210.stl
Wheel 2 (2X): wheel2_210.stl
O-ring: #210 1” x ¾”
Orient with side of car on print bed; use low quality print setting with no supports; 10% infill for body and 100% infill for wheels; assemble wheels as described on slide 17.
Length = 97 mm
Width = 25 mm
Height = 55 mm
Wheel Diameter = 23 mm
Minis
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Bumper Car Mini: mini_bumper.stl
Sail Car Mini: mini_sail.stl
Flatbed Mini: mini_flatbed.stl
Spring: mini_spring.stl
Wheel1 (2X): wheel1_210.stl
Wheel2 (2X): wheel2_210.stl
O-Ring: #210 1” x 3/4”
Orient with upper surface of car on print bed; use low quality print setting; 10% infill for body and 100% infill for wheels; assemble wheels as shown in slide 17.
Minis are small and fast printing yet structurally sound versions of the larger cars described in previous slides. They are ideal for introducing younger students to informal science based inquiry.
Length = 80-110 mm
Width = 25 mm
Height = 13 mm
Wheel Diameter = 23 mm
More Printables
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Parts
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Solar Panel
Motor
Rain Gutter Ramp
Raingo 4-1/4 in. H x 5 in. W x 10 ft. L Vinyl C Gutter. ACE Hardware and Aubuchon Hardware: $7.99
Battery Pack with Integrated Switch
https://www.amazon.com/gp/product/B01KFCPHNW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
0.45V, 400 mA: $4.35 each
2V, 200 mA: $6.45 each
$1.95 each
O-Rings
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1/2" ID, 3/4" OD, 1/8" Width
Fits 16 mm diameter wheel
Package of 500 @ $15.14:
#206
#210
#214
1-1/4" ID, 1-1/2" OD, 1/8" Width
Fits 34 mm diameter wheel
Package of 100 @ $11.86:
#218
3/4" ID, 1" OD, 1/8" Width
Fits 23 mm diameter wheel
Package of 100 @ $9.74:
1-1/2" ID, 1-3/4" OD, 1/8" Width
Fits 41 mm diameter wheel
Package of 100 @ $12.97:
#222
1" ID, 1-1/4" OD, 1/8" Width
Fits 27 mm diameter wheel
Package of 100 @ $11.05:
1-3/4" ID, 2" OD, 1/8" Width
Fits 56 mm diameter wheel
Package of 100 @ $15.63:
#226
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Create Wheel Assemblies
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OD = 14.0 mm
ID = 10.0 mm
The same axle cylinder design is used for all car sizes, only the length changes depending on the width of the car. Body holes such as those in the VW are 10.0 mm in diameter.
Axle Cylinder: axle_cylinder.stl
Assemble Wheels
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Wheel 1
L= 40, 50, 60 and 70*
Wheel 2
Completed Wheel Assembly
Determine O-ring Size
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This handy O-ring gauge accommodates o-rings with outside diameters ranging between ¾” and 2 ¼”.
Create a Rain Gutter Track
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Raingo plastic rain gutter can be cut into two 5 ft. sections or four 2.5 ft sections for table top explorations of energy and motion concepts. The connectors facilitate joining multiple track sections.
Use Fidget Car O-Rings
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Many Fidget Car designs used the #214 O-ring (1" ID, 1-1/4" OD, 1/8" Width).
EasyCars can accommodate the same O-rings in conjunction with the following wheel designs as long as the body width is 45 mm:
Wheel 1 (2X): wheel1_214.stl
Wheel 2 (2X): wheel2_214.stl
STL
STL
For additional information about designing and printing EasyCars, please contact
David S. Perloff, Ph.D.
daveperloff@gmail.com
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