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| Date | : | 04/27/2001 12:00:00 PM |
| Comments | : | Two demonstrations The first is staggered cross-ties to demonstrate the suspension. The second is a hill with rollers spaced so the hill must be ascended with the pull of only one wheel. |
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| Date | : | 04/27/2001 12:00:00 PM |
| Comments | : | Two demonstrations The first is staggered cross-ties to demonstrate the suspension. The second is a hill with rollers spaced so the hill must be ascended with the pull of only one wheel. |