snowmobile rear drive
DESCRIPTION
Snowmobile Rear Drive. Neil Miller Chris Hill Jeremy Nichols. Research. RND Innovators Only company marketing a rear drive system Claims Shorter stopping distance Increased efficiency Improved handling Eliminates “darting”. Research. Proof of concept Two modified 800r’s - PowerPoint PPT PresentationTRANSCRIPT
Snowmobile Rear Drive
Neil MillerChris Hill
Jeremy Nichols
Research
• RND Innovators – Only company marketing a rear drive system
• Claims– Shorter stopping distance– Increased efficiency– Improved handling– Eliminates “darting”
Research
• Proof of concept– Two modified 800r’s• Claim 20.4 mpg• Next closest sled was a fuel injected 4-stroke with
14.4 mpg
RND Innovator’s Design
Cruise, Conventional Snowmobile
Cruise, Rear Drive Sled
Acceleration, Conventional Sled
Acceleration, Rear Drive Sled
Braking, Conventional Sled
Braking, Rear Drive Sled
Design Options
• Option 1– Use drive shafts
• Use bevel gears from an outboard engine– Bolt in design– Reasoning
• No modifications to the tunnel• Keep center of mass in the middle of the tunnel
– Disadvantages• Heavier than stock• Steep U-Joint angles
Option 1
Option 1
Option 2• Belt drive
– Use synchronous belt– Bolt in design– Adanvtages:
• Lighter than drive shafts• Don’t have to worry about U-Joint angle• Simpler to produce• Lighter than stock
– Disadvantages:• Snowpack in the skid• Belt whine
Option 2
Option 2
Testing
• Using electric motors (Possible depending on time)
• Fuel efficiency runs• Put scales under skis on the track dyno
Questions?