Single Rider Human Powered Vehicle

Senior Project 2 Progress Report

Design and construct, respective of constraints, a single-rider recumbent fully faired human powered vehicle.

Compete and win the 2010 ASME East Human Powered Vehicle Challenge.

Objective

Matthew Wright ◦ Team Manager/Seating Position/Steering

James VanBiervliet◦ Frame

Dante Mucaro◦ Drivetrain/Frame Integrations

Rich Nelson◦ Fairing

◦ Advisor: Dr. Lisa Grega

◦ Co-Advisors: Dr. Norman AsperDr. Manish Paliwal

Team Members

Matthew Wright

Project Management, Seating Position,

and Steering

Assisting other team members with all aspects of the project build

Making sure parts and materials are ordered and ready when needed.

Making sure the project is staying within budget,

Completing application process for competition

Keeping the team website up to date <TCNJhumanpowered.blogspot.com>

Management

Senior Project 2 Gantt Chart

Modified frame design from mock up due to the rider position

Ordering a 20” solid front fork with disc brake mounts

◦ Will weld mounts for other front brake

Begin manufacturing steering assembly

Rider Position and Steering

James VanBiervliet

Frame

Frame A full scale

model was created from wood

Frame Using the finalized dimensions obtained

from model, a roll bar was designed

Frame The frame was then broken down into

elements and nodes

Frame Pieces of bamboo were then cut according

to the list of elements

Dante Mucaro

Drivetrain & Frame Integrations

Drivetrain Revisions Gearing

50-34T crankset replaced in favor of 50-36-22T triple ring crankset

10spd 11-28T cassette replaced with 9spd 11-34T cassette

Crank arm design modified to collar-type adjustable crank mount

Table of Gear RatiosDrive chain ratio Crankset sprocket Cassette Sprocket Driven chain ratio Total drive ratio Development (ft) Equivalent Speed (MPH)

0.6415 22 34 1.545 0.991 6.87 7.02

0.6415 22 30 1.364 0.875 7.78 7.96

0.6415 22 26 1.182 0.758 8.98 9.18

0.6415 22 23 1.045 0.671 10.15 10.38

0.6415 22 20 0.909 0.583 11.67 11.94

0.6415 22 17 0.773 0.496 13.73 14.04

0.6415 22 15 0.682 0.437 15.56 15.92

0.6415 22 13 0.591 0.379 17.96 18.36

0.6415 22 11 0.500 0.321 21.22 21.70

0.6415 36 34 0.944 0.606 11.23 11.490.6415 36 30 0.833 0.535 12.73 13.020.6415 36 26 0.722 0.463 14.69 15.030.6415 36 23 0.639 0.410 16.61 16.990.6415 36 20 0.556 0.356 19.10 19.530.6415 36 17 0.472 0.303 22.47 22.980.6415 36 15 0.417 0.267 25.47 26.040.6415 36 13 0.361 0.232 29.38 30.050.6415 36 11 0.306 0.196 34.73 35.510.6415 50 34 0.680 0.436 15.60 15.96

0.6415 50 30 0.600 0.385 17.68 18.09

0.6415 50 26 0.520 0.334 20.40 20.87

0.6415 50 23 0.460 0.295 23.07 23.59

0.6415 50 20 0.400 0.257 26.53 27.13

0.6415 50 17 0.340 0.218 31.21 31.92

0.6415 50 15 0.300 0.192 35.37 36.17

0.6415 50 13 0.260 0.167 40.81 41.74

0.6415 50 11 0.220 0.141 48.23 49.33

Comparison 27 available speeds vs. previous 20 speeds Broader range of gearing

“Granny” gear equivalent speed decreased ~40% Top gear equivalent speed increased ~13.5%

Negligible cost impact

Twin Disc Front Hub Twin disc mounts for standard 6-bolt rotors Machined from 6061 aluminum stock

Current Drivetrain Status

Components ordered Cassette, crankset, bottom brackets, single

sprockets, chain, derailleur (F&R), rims & spokes, brake rotors & calipers, shifters, cables

Front hub and wheel construction To be completed by March 8

Crank arm implementation To be integrated into frame structure prior to frame

completion Rear dropout fabrication

Design to be finalized and implemented prior to frame completion

Rich Nelson

Aerodynamic Fairing

Design and construct,

respective of constraints,

a single-rider recumbent fully faired human

powered vehicle.

Compete and win the 2010 ASME East Human Powered Vehicle Challenge.

Aerodynamic Fairing - CFDVelocity Contour Plot Pressure Streamlines

Drag Force (lb)Surface Drag (lb) Total Drag (lb)

Lift Force (lb)

Fairing 1 2.1729 0.79 2.9629 0.326

Fairing 2 2.277 0.81 3.087 0.013

Fairing 3 2.926 0.83 3.756 0.83

Aerodynamic Fairing - CFD

#1

#2

#3

Aerodynamic Fairing – Plug Construction

Took cross sections from CAD model

Made wooden cross sectional templates

Aerodynamic Fairing – Plug Construction

Using wood templates to shape foam into plug

Next – Sand plug smooth, prepare for Vacuum Bagging

1. Vacuum bag layup of both halves of Fairing

2. Cut out top hatch of fairing and wheel cutouts

3. Integrate fairing into the frame and fiberglass halves together

Aerodynamic Fairing – Fabrication

Thank You For Your Time

Questions?