Snowmobile Rear Drive
description
Transcript of Snowmobile Rear Drive
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Snowmobile Rear Drive
Neil MillerChris Hill
Jeremy Nichols
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Research
• RND Innovators – Only company marketing a rear drive system
• Claims– Shorter stopping distance– Increased efficiency– Improved handling– Eliminates “darting”
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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
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RND Innovator’s Design
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Cruise, Conventional Snowmobile
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Cruise, Rear Drive Sled
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Acceleration, Conventional Sled
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Acceleration, Rear Drive Sled
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Braking, Conventional Sled
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Braking, Rear Drive Sled
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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
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Option 1
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Option 1
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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
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Option 2
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Option 2
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Testing
• Using electric motors (Possible depending on time)
• Fuel efficiency runs• Put scales under skis on the track dyno
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Questions?