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Snowmobile Rear Drive

Snowmobile Rear Drive

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Snowmobile Rear Drive

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  1. Snowmobile Rear Drive Neil Miller Chris Hill Jeremy Nichols

  2. Research • RND Innovators • Only company marketing a rear drive system • Claims • Shorter stopping distance • Increased efficiency • Improved handling • Eliminates “darting”

  3. 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

  4. RND Innovator’s Design

  5. Cruise, Conventional Snowmobile

  6. Cruise, Rear Drive Sled

  7. Acceleration, Conventional Sled

  8. Acceleration, Rear Drive Sled

  9. Braking, Conventional Sled

  10. Braking, Rear Drive Sled

  11. 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

  12. Option 1

  13. Option 1

  14. 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

  15. Option 2

  16. Option 2

  17. Testing • Using electric motors (Possible depending on time) • Fuel efficiency runs • Put scales under skis on the track dyno

  18. Questions?

  19. Sources • http://rndinnovators.com/