16 miles on the Trent, locks 20-27

We left Peterborough Marina around 0930, lock 21 is a very special lock on my trip.  It is called Peterborough Lift Lock, it’s not a conventional lock design.  (here are some facts I learned about it from Lock Master Jon) The lock has two identical bathtub-like ship caissons in which vessels ascend and descend. Both caissons are enclosed at each end by pivoting gates, and there are pivoting gates at the upper and lower reaches of the canal at the junctions with the caissons.  The gates on the caissons fit into slots on the gates on the reaches, so that they open in unison.  Each caisson sits on a ram, the shafts for which are sunk into the ground, are filled with water, and are connected with a pipe that has a crossover control valve.  The caissons are guided up and down on either side by rails affixed to concrete towers.  No external power is needed, The lift lock functions by gravity alone using the counterweight principle. One caisson always ascends and the other always descends during each locking cycle.

check out my video, its long even though its running at 4x normal speed so just enjoy the lift lock with JJ Grey & Mofro “Blackwater” 5.5min

https://youtu.be/V8qdZgPI6Bo

IMG_8757IMG_8756

IMG_8724IMG_8725

IMG_8746IMG_8749

One thought on “16 miles on the Trent, locks 20-27”

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s