I'm in the NEWS!!!!....check it out: http://www.bangornews.com/editorialnews/article.cfm/ID/400305/cfid/8161622/cftoken/69864596
Below you will find images(NEW)of the motor, battery, and chassis I am using for my electric dirtbike. The calculations and theory can be found here.*****new images
The motor and controller combination I chose is the Etek 48V DC electric motor with Sevcon Millipak 4Q motor controller rated at 48V. This motor controller can be programmed to perform regenerative breaking and increase the range of my bike.
<!--[if !vml]-->
The Battery Pack option I chose is four Universal Sealed Lead Acid 12Volt 40Ah batteries. Each weighs 27lbs.
Above are images of the 1981 Honda XL 250 chassis before removing the engine, exhaust and other unecessary parts.
Below are images of the old engine vs new motor, and stripped chassis.
Below are images of the carboard models of the batteries and motor for my system and their position on the bike.
Below are images of the system almost complete. The controller still needs to be mounted.
Specifications
Top speed: 50 mph
Range: 30 miles, max traveling 20mph
Acceleration: 0-30 in 4s
Total Weight: 250 lbs?...need to weigh it
Cost to build: $1100 including charger
The cost is not bad compared to a similar production bike like Blade retailing for $5,995, of course that bike comes with a super fast charger that only takes 20-30 minutes to charge the 48 volt battery pack. I need to get one of those!!!!!.....alas...they're $495.
.
Observatories:
KPNO
Palomar
Other cool links:
SIRTF
GOODS
Email me: Ceara McNally