Four such ferries still operate across the Rhine at Basle, Switzerland, but
they do not use chains as such, but steel cables strung high up across the
river so that boats can pass underneath.
----- Original Message -----
Sent: Saturday, September 29, 2001 9:33 AM
Subject: [SoG] Chains in the River Thames
Could this refer to the profits arising from the operation of a chain
A chain is laid across the river and a vessel is attached to the chain so
that it is free to move along the chain. Below the vessel is a keel set
45 degrees to the river. The sideways force exerted on the keel by
current drives the vessel across the river and the chain stops the
component of the force sweeping the vessel down the river. In order
back over the river, it is necessary to have a mechanism whereby the
be moved to 45 degrees the other way.
I remember seeing such ferries operating on the Rhine 40 years ago but
no idea whether they were ever used on the Thames.