The document discusses the design of an electrically assisted human powered vehicle. It provides specifications for components like the seat, pedaling mechanism, steering, and ventilation. Dimensions are given for fitting a range of rider sizes. Stock components are proposed for controls like throttles, displays and switches. Ventilation calculations specify a target of 700 air changes per hour through ducts sized based on the vehicle's air speed.

1. Electrically assisted human powered vehicle

6. Seat Dimension Seat back height 60cm Seat length 43 cm Seat width 50 cm Seat pan angle 22  from horizontal Seat back angle 38 to 58  from horizontal Back angle adjust. 20  Horizontal adjust. 20 cm

7. Seat Materials Selection Criteria: Good compromise between comfort and airflow. Materials Considered: Hard shell seat with padding vs. Mesh seat vs. A combination of both

10. Steering Effort REF : H.F.D.G. www.hf.faa.gov/docs/508/docs/hfdg.pdf The Push Pull forces tabulated are for the 5 th percentile male. The 5 th percentile female strength is 56.5% of that of men (for upper extremities) For 90 o Elbow flexion (while steering) the Push force (Push is lower than Pull) for the left/weaker hand is 78.4N The Push force for the 5 th percentile female is therefore 78.4 * 0.565 = 44 N

11. Braking Effort REF : H.F.D.G. www.hf.faa.gov/docs/508/docs/hfdg.pdf The muscle strength of the arm, hand and thumb for control forces tabulated are for the 5 th percentile male. The 5 th percentile female strength is 56.5% of that of men (for upper extremities) The hand grip force for a sustained hold is 116 N for the left/weaker hand. The hand grip force for the 5 th percentile female is therefore 116 * 0.565 = 65 N

12. Input Torque For the recumbent position when α is within 15 o to 19 o and when β is 155 o max. Leg Force is 2300 N. The 5 th percentile female strength is 65.5% of that of men (for lower extremities) The maximum pedal force deliverable by the 5 th percentile female is 753 N For a crank length of 175 mm the maximum torque deliverable would be 132 Nm REF : msis.jsc.nasa.gov/sections/section04.htm#Figure%204.9.3-5

14. Pedal Assembly Dimensions and Weights taken physically from a Peugeot bicycle. Mass of Pedal Assembly (without the chain and the housing) = 1.820 kgs.

15. Pedal Shaft Assembly Cup and cone arrangement for the bottom bracket

16. Detail of Bearing Housing This housing is a part of the chassis and would have to be located as shown in the previous slides.

17. CAD Model - Pedal Assembly

21. Initial controls layout concept

22. Initial controls layout concept (alternate)

23. Control layout design

24. Handle grip location layout

25. Indicator location layout

26. Miscellaneous controls location layout 5%F = 85cm (to head) 2/3 x 5%F = 57cm (to shoulder) 5%F max reach = 66cm 120 deg Occupant (based on 5% female sizes) Arc of possible arm motion

27. Speedometer (stock) AS8® Digital Speedometer 6 function digital scooter and bike speedometer. Speedometer range is 0-99.9 km/h (0-62mph). Elapsed time range is 0-18 hours. Odometer range is 0.0-9999.99 km (6220 miles) and distance range is 0-999.99 km (0-622 miles). Non-contacting magnetic sensor. Functions include: Speedometer, Odometer, Clock, Total distance, Trip riding time and Average speed.. Dimensions: 56mmx46mmx18mm Weight: 25 grams Price: $17.95

28. Battery condition indicator (stock) 24 Volt Battery Condition Meter Lashout® 24 Volt battery meter with 3 LED lights (green, yellow, and red). Panel mount design. Two wire leads with connector. Price: $15.95

30. Machined handle layout drawing

31. Throttle control (stock) Currie Thumb Throttle - 3 Wire (Schwinn, GT, IZIP, & Mongoose Scooters) Thumb controlled, variable speed set Price: $29.99

32. Speed controller (stock) Rad2Go® E36 36V 800W Electric Scooter Speed Controller Price: $119.95 RATED VOLTAGE: 36V RATED MOTOR: up to 800W

33. Gear shift controller (stock) SRAM ATTACK 8 SPEED REAR TRIGGER SHIFTER Price: $41.10

34. On/off controls (stock) SPST Snap In Rocker 3/4" x 1/4" x 1/4" 6 amp @ 125 - 250VAC To be used for the following function: 1) Lights Price: $0.45 SPST N.C. Push Button Switch Normally closed momentary switch with black button. Mounts in 5/16" diameter hole. Hardware included. To be used for the following functions: 1) Left turn signal 2) Right turn signal 3) Horn Price: $0.29 SPST On - Off Key Switch Keyed alike. Key is removable in the off position Rated: 2A @ 120VAC 1A @ 240 VAC Quick connect terminals. Price: $2.50

35. Horn (stock) 12 Volt Scooter Horn Electroplated steel body and hardware. Adjustable tone. 1/4" wide tab connectors. Price: $4.95

36. Handles/control sticks (stock) "C" HANDLE SPECIFICATIONS + Dimensions: 7“ x 3” x 2”wide + Switch Pack: blank, 2, or 4 switches + Weight: 150 grams (5 oz.) + Overlay: embossed .007 polyester + Case: 1/8“ thick High Impact ABS + Mounting Pin: 6061 Aluminum 1“ dia. + Wire: standard 2’ @ 20 gauge + Switch Rating: 5 amps + Bushings: 10 mm - 5/8“ (internal threads) Price: $130 each

37. Handles/control sticks (stock) Single Axis-Proportional Part #: SM-P1: Operation Proportional: Spring return to center Supply: 5VDC Output: 0.5 - 2.5 - 4.5 VDC Load Resistance: 5 K Ohm Travel: +/- 16 Rating: IP-66 (above panel) THUMB SLIDER CONTROL ELECTRONICS SCHEMATIC PUSH BUTTON CONTROL