Freedom EV
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Freedom EV is an open source hardware electric vehicle designed by the EVProduction club. It is a 3-wheeler "tadpole" EV with 2 steerable front wheels, 1 driven rear wheel, and 2 side-by-side seats.
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[edit] Latest progress
- Oct 2007 - Body and chassis are mated together. Door and window openings are cut out. Suspension is being designed and fitted.
- Aug 2006 - Chassis mold finished, and prototype chassis produced from this mold.
- July 2005 - Jerry has finished the male mold and sent it to the glass shop to build the production tooling.
- Sept 2005 - The production molds, tooling have been finished and the first body is being started.
[edit] Business strategy
Start with 20 beta units to get processes correct and production running smoothly, then go full production with small factories around the U.S. and Canada as needed.
[edit] Specifications
[edit] Dimensions
- height 55 in (1.40 m
- width 60 in (1.52 m)
- length 133 in (3.38 m)
- wheelbase 95 in (2.41 m)
- tread (front) 56 in (1.42 m)
- turning radius (?)
- ground clearance 7 (180 mm)
[edit] Weight
- empty 550 lb (250 kg)
- payload 500 lb (230 kg) max
- batteries 750 lb (340 kg) max
- GVWR 1800 lb (820 kg)
[edit] Estimated performance
- top speed 80 mph (130 km/h)
- acceleration 0-30 mph ?
- acceleration 0-60 mph ?
- time, 1/4-mile ?
- range at constant 30 mph (50 km/h) 125 miles (200 km)
- range at constant 60 mph (100 km/h) 90 miles (145 km)
[edit] Subsystems
These are not all decided yet; choices here are the current favorites. Links on each item go to pages with more options and information involved in the decision process.
[edit] Tires
- front 155/80R14 radial, 22.8" (579 mm) diameter
- rear 155/80R14 radial, 22.8" (579 mm) diameter
[edit] Brakes
- front drum
- rear drum
[edit] Motor
- type, series DC; quantity 2 D+D ES-22 6.7" motors
[edit] Controller
- DC 450 ampere PWM controller
[edit] Suspension
- front double unequal length A arms, air adjustable shock absorbers
- rear trailing arm, Gates Polychain belt drive to motor
[edit] Steering
- type rack and pinion
[edit] Batteries
- type (twelve 6 V flooded golf cart batteries, Trojan T-105 or equivalent?)
- battery box 36 in wide x 45 in long x 12 in high (0.91×1.14×0.30 m)
[edit] Body
- composite one-piece body/chassis
- 3 doors
[edit] Interior and accessories
- seats 2, side-by-side buckets 48" wide cabin
- heater
- air conditioner, electric
[edit] External links
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