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Desert Rat
04-22-2011, 03:21 PM
Electric Motor Assisted Bicycle WINS Death Race 2011 April 16th

Death Race is a motor Assisted Bicycle racing and rally event held several times a year at Musselman Honda Circuit (P1 Kart Circuit) in Tucson,Arizona.

P1 Kart Circuit - Home (http://www.p1kartcircuit.com/)

Just recently Electric bikes have started competing in Death Race against gasoline assisted bicycles. And this year #19 Paul from Oregon came in first place overall with his electric mountain bike.

Paul's electric bike was able to beat some of the fastest bikes at Death Race with 5 and 9hp gasoline engines. Paul's simple and light weight electric bike which from what I understand was around 4hp was awesome to see on the track. I will have more specs of Paul's bike when I get the facts.

Here are some photos of the winner and his bike. Congratulations Paul!, well done.

http://i1227.photobucket.com/albums/ee428/MotorAssistedBicycleRacingRally/Death%20Race%20April%202011/SANY5537.jpg

1st place Paul Oregon Electric Bicycle
2nd place Alex Arizona Gasoline Bicycle
3rd place David Arizona Gasoline Bicycle

Desert Rat
04-22-2011, 03:31 PM
Death Race 2011 Videos and Photos

Photo links....

Spooky Tooth Death Race (motorized bicycles) - mikephotos' Photos | SmugMug (http://mikephotos.smugmug.com/Bicycles/Spooky-Tooth-Death-Race/16656697_PprrM8#1255730096_CK6qGJX)

Death Race April 2011 pictures by MotorAssistedBicycleRacingRally - Photobucket (http://s1227.photobucket.com/albums/ee428/MotorAssistedBicycleRacingRally/Death%20Race%20April%202011/)

Videos links...

YouTube - Death Race 2011 Main (http://www.youtube.com/watch?v=y1leG-fcDzg)

YouTube - Death Race 2011 Heat B race 1 (http://www.youtube.com/watch?v=zfmLdahQ-Tk)

YouTube - Death Race 2011 Heat Race A, race 1 (http://www.youtube.com/watch?v=eYLnavlxXRk)

YouTube - Main Event - fish-eye view GOPR0388.MP4 (http://www.youtube.com/watch?v=eZtPwlJXKv4)

Desert Rat
04-22-2011, 04:31 PM
Paul winner of Death Race 2011 stats...

12 laps in the main event, 0.79 mi laps, starting voltage 76.1v (4.23 v/cell), Vmin 66.7, Amax 56.7, maxS 44.3, Ave S. 31, 6.8ah 483wh consumed, 47 wh/mi.
Drive:
1.7:1 8mm pitch, 15mm width primary belt reduction with ENO hidden inside 48T pulley, 6.15:1 219 chain secondary, sprocket on rotor mount of hub, total reduction 10.5:1, Turnigy 130kv 80/100 with external halls at 17.1degree spacing
Controller:
ebikes.ca 40 amp 12 fet infineon, modified resistors for high voltage, and shunt soldered about 15-20% of its length
Batteries:
Secret lithium ion pouch cells 18S2P, 20ah x 66v.
Bike weight unknown, but we guessed 60-65lbs.

Desert Rat
04-22-2011, 06:08 PM
Few more photos of E-bikes @ Death Race 2011

Photo 1 #58 Dan from New Mexico with his front hub E-bike

Photo 2-3 #40 Todd from Michigan with his 2 electric motor E-bike