Talk:Peterborough Lift Lock

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[edit] How long?

• How long does it take for the lock to cycle?
• Dimensions? -- Geo Swan 20:27, 27 August 2005 (UTC)

[edit] Displacement

I've removed the reference to the larger of the two displacement figures. Given the dimensions of the lock, the 1542 ton displacement figure is not possible. To wit:

140 ft    •    33 ft    •    9.83 ft        = 45430 ft³ of volume in the lock
 
45430 ft³ of water • 0.03123 short tons/ft³ =  1418 short tons
                                               1266 long tons
                                               1286 metric tons
                                            2836588 pounds

Naturally, the actual tonnage of water will be somewhat less, as the lock doesn't fill completely. Nonetheless, the math works out in such a way as to make a 1542 ton displacement impossible. However, any structure that moves 2.8 million pounds of anything is pretty impressive. --Ssbohio 18:01, 5 August 2006 (UTC)