1. Electric Motorcycle Design Project
SR. Design Project
Fall 2008-Spring 2009
Justin Cole
Chad Dickman
Todd Sanderson
Kris Williams

2. Outline The project Components Where we stand Budget
Sample Calculations
Data Tables
Graphs
Timeline
What’s Next?
Conclusion

3. The project Convert gasoline motorcycle to electric
Emissions
Energy crisis
Ideal for short commutes.
Create publicity for the school.
Outreach
Open house

4. Components Batteries Charger 4-12VDC sealed lead acid
Designed for electric vehicles.
electricmotorsport.com
Charger
Soneil 48 V 5 amp
thunderstruck-ev.com

5. Components (continued)
Motor
Briggs and Stratton Etek-R
8 hp continuous
15 hp peak
Controller
Sevcon Milipack
Regenerative
48VDC
Wiring, fuses, throttle
electricmotorsport.com

6. Where we stand Motor kit & Batteries Purchased and received
electricmotorsport.com
Purchased motorcycle
Lemon and Barrett’s
Still need parts
Chain
Sprockets
Charger
Miscellaneous

7. 48 volt System Budget Breakdown Table of budget breakdown
Item
Price
Supplier
Bike
$250.00
Lemon and Barrett’s
Kit(which includes the following):
$1,075.00
electricmotorsport.com
motor
controller
throttle
contactor
fuses
wiring
Charger
$175.00
thunderstruck-ev.com
4 $70
$280.00
Chain
$100.00
Gears
$200.00
General Costs
$300.00
subtotal
$2,380.00
Taxes
$142.80
Total
$2,522.80
Table of budget breakdown

8. Sample Calculations
Aerodynamic Drag Force (Fd): Cd= Coefficient of drag of the vehicle A= Frontal area of the vehicle in square feet V= The vehicle’s speed in mph Rolling Resistance (Fr): Cr= Rolling resistance factor W= Vehicle weight in lbs
Force due to Acceleration (Fa): Ci= Unit conversion factor W= Vehicle weight in lbs a= Acceleration in mph/second Force due to Climbing Hills (Fh): Φ= Angle of incline

9. Sample Calculation (continued)
Total Force on the Vehicle (FT): All four forces added together The Horsepower needed (hp): FT= Total Force in lbs V= Speed expressed in mph
Torque needed from the Motor (T): hp= Horsepower RPM= Revolutions per minute
Conversion from hp to Watts (W):
Current needed to Power in Amps(A):
V= Volts from the battery
W= Power need to run in Watts

10. Sample Calculations (continued)
Time in hours the Vehicle can run (Time):
Ah= Amp-hours from the battery
A= Current
Total Distance in Miles Vehicle can Drive (D):
mph= Speed in mph
Time= Time in hours vehicle can run
Battery Charging Time (Tc):
Ah= Amp-hours from the battery
Amp= Amps from the battery charger

11. Acceleration Resistance
Data Tables
Speed
Force
mph
Aerodynamic
Rolling Resistance
Wind Resistance
Acceleration Resistance
Hill Climb
Total 5
0.128
7.320
69.365
14.63
91.446 10
0.512
91.830 15
1.151
92.469 20
2.046
93.364 25
3.197
94.515 30
4.604
95.922 35
6.266
97.584 40
8.184
99.502
Table of various resistive forces with a constant acceleration of 3 mph/sec and a 3% grade.

12. Data Table (continued)
Speed
Acceleration
Force Total
Power
Torque
Current
Time
Distance
RPM
mph
mph/sec
lbs HP W
ft*lbs
Amps
Hrs
min
Miles
2830.6 40 1
30.57
3.26
6.05
50.70
0.69
41.42
27.62 2
53.69
5.73
10.63
89.04
0.39
23.58
15.72 3
76.81
8.19
15.20
127.38
0.27
16.49
10.99 4
99.93
10.66
19.78
165.73
0.21
12.67
8.45 5
123.06
13.13
24.35
204.07
0.17
10.29
6.86
Table of Distance and other parameters with varying accelerations

13. Data Tables (continued)
Speed
Grade of Incline
Force Total
Power
Torque
Current
Distance
MPH %
lbs HP W
ft*lbs
Amps
Miles 40 1
20.38
2.17
4.03
33.80
41.42 2
25.26
2.69
5.00
41.89
33.42 3
30.14
3.21
5.96
49.98
28.01 4
35.01
3.73
6.93
58.06
24.11 5
39.87
4.25
7.89
66.13
21.17 6
44.73
4.77
8.85
74.18
18.87 7
49.58
5.29
9.81
82.22
17.03
Table of Distance and other parameters with varying inclines

14. Data Tables (continued)
Accelerating at 4 mph/sec
Accelerating to 40 mph
Total KWh from the batteries
KW needed for accelerating at 4mph/sec
Accelerating Time in Hours (30 stop and go's)
KWh used when accelerating at 4 mph/sec for a total of 5 min worth of accelerating
Distance traveled accelerating
0 to 5
0.599
0.01
0.05
5 to 10
1.801
0.02
0.10
10 to 15
3.014
0.03
0.16
15 to 20
4.246
0.04
0.21
20 to 25
5.505
0.06
0.26
25 to 30
6.798
0.07
0.31
30 to 35
8.134
0.08
0.36
35 to 40
9.518
0.42
Total KWh used accelerating
Remaining KWh
Hours of constant speed
Distance traveled in miles after Accelerating at 40 mph
Distance traveled accelerating (miles)
Total Distance traveled in miles
0.41
0.59
0.44
17.56
1.88
19.43
Table of distance with a period of acceleration followed by a period of constant speed.

15. Graphs

16. Graphs (continued)

17. Previous Designs Very similar Verified project calculations
Motor
Batteries
Type of bike
Verified project calculations
Made in home garage.
Proves feasibility
Total project costs less than $3000
Picture of bike that uses the same motor and type of batteries as this project.

18. Current Timeline Electric Bike Conversion Gantt Chart Timeline October
November
January
February
March
April
May 1 2 3 4
Research
Budget
Calculations
Design of Bike Specs
Design of Bike Layout
Writing Sponsorship Proposal
Presenting to Companies
Purchasing the Bike
Buy Batteries
Build Batt. Trays
Buy Electric Motor Kit
Drive train Assembly
Motor Mount
Electric Assembly
Testing
Demo

19. What’s Next? Bike preparations Layout of components Bike Design
Assembly
Wiring
Testing
Demonstrations

20. Conclusions The design is feasible Some minor funding is still needed
The project is coming along pretty well according to the plan.
The preliminary research and calculations are complete.
The bike is ready to begin laying out the components.