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Old

Feb 23, 2008 | 10:46 AM

#21

turtlevette

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Joined: Feb 2003

Posts: 3,053

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St. Jude Donor '03,'11

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assuming final ratio of 1:1

5500/4.11= 1338 wheel rpm

now calculate tire dia in inches
235*.6*2/25.4 +15 = 26.1

circumference =26.1*pi=82in

1338 * 82 = 109,716 in/min

convert to miles/hr

109,716*60min/hr = 6,582,960 in/hr

2,095,500/(12in/ft)=548,580ft/hr

548,580/(5280ft/mi)=103.9 mi/hr

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Old

Feb 23, 2008 | 02:30 PM

#22

Ironcross

Thread Starter

Race Director

Joined: Nov 2002

Posts: 12,142

Likes: 54

From: Taylor Michigan

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Amazing

Quote:

Originally Posted by turtlevette

assuming final ratio of 1:1

5500/4.11= 1338 wheel rpm

now calculate tire dia in inches
235*.6*2/25.4 +15 = 26.1

circumference =26.1*pi=82in

1338 * 82 = 109,716 in/min

convert to miles/hr

109,716*60min/hr = 6,582,960 in/hr

2,095,500/(12in/ft)=548,580ft/hr

548,580/(5280ft/mi)=103.9 mi/hr

Cant argue with that,...

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Old

Feb 23, 2008 | 03:22 PM

#23

enkeivette

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Joined: Sep 2004

Posts: 2,412

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Quote:

Originally Posted by turtlevette

assuming final ratio of 1:1

5500/4.11= 1338 wheel rpm

now calculate tire dia in inches
235*.6*2/25.4 +15 = 26.1

circumference =26.1*pi=82in

1338 * 82 = 109,716 in/min

convert to miles/hr

109,716*60min/hr = 6,582,960 in/hr

2,095,500/(12in/ft)=548,580ft/hr

548,580/(5280ft/mi)=103.9 mi/hr

Wow that was some self-indulgent math right there.

And all that for a difference of .1 mph?

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Old

Feb 24, 2008 | 12:36 AM

#24

turtlevette

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St. Jude Donor '03,'11

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Quote:

Originally Posted by torqvette

Wow that was some self-indulgent math right there.

And all that for a difference of .1 mph?

before there was an internet to find anything easy we had to do things the old fashioned way.......THINK.

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Old

Feb 24, 2008 | 01:18 AM

#25

enkeivette

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Joined: Sep 2004

Posts: 2,412

Likes: 3

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Quote:

Originally Posted by turtlevette

before there was an internet to find anything easy we had to do things the old fashioned way.......THINK.

You like money too?! We should hang out.

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