20/04/2026
A special day at Gayle Mill last week, our 1920s turbine is back together again!
Having reassembled the control vanes into the side of the turbine, we lowered the whole assembly into the pit and (with a bit of pushing and shoving) got it back in place on the turbine body. We then tightened it into place, fitted the bearing and the control rods, tightened the packing glands and let the water back in.
Success! Well, mostly. The turbine ran fine, spun up the dynamo and lit the lights, and with the new cush drive is much quieter than before.
Unfortunately we still don’t seem to be able to properly turn the turbine off fully (the problem we’ve had from the start). Although it is possible to force the vanes closed using the control wheel, this feels to be putting a lot of strain on the mechanism and if we carry on doing this it will probably result in another broken vane fairly quickly.
We’ve got a few more checks to carry out, but our suspicion right now is that one of the vanes has become twisted over the years and is not aligned properly. The only way to confirm this for sure is to remove the side again and assemble it on the bench where we can see what’s going on inside.
Since the summer season is fast approaching, and we want to be able to demonstrate the turbine for tours, we’ll probably leave it alone for now and control it with the stopcock, then look at stripping it down again later in the year when things quieten down.
So not a complete success, but a considerable improvement on the past, and once again our grateful thanks to all the people who helped us to get this historic machine apart, repaired and back together again.
Gayle Mill is open on Thursdays from 10am until 4pm with guided tours every hour on the hour from 10am until 3pm.