I built & displayed a canal lock last September at Ironbridge for a BBC program on industrial inventions with Adam Hart Davies. The program was shown over 6 weeks during the autumn. E.W. ----- Original Message ----- From: "alanjstepney" <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Monday, August 30, 2004 10:56 PM Subject: [modeleng] Re: sprockets > That sounds like an interesting project. > > I reckon that the lock is one of those jobs that appears tricky at first > glance, but once you come to think about it, a real simple solution will > present itself. > > alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx > > www.alanstepney.info > Model Engineering, Steam Engine, and Railway technical pages. > > ----- Original Message ----- > From: "Terry Lane" <tel@xxxxxxxxxxx> > To: <modeleng@xxxxxxxxxxxxx> > Sent: Monday, August 30, 2004 9:07 PM > Subject: [modeleng] Re: sprockets > > > Thanks Richard - yes, the diameter is a bit flexible & that would be big > enough. To make the problem a little clearer (?) this wheel is wanted for > the drive system under a HO scale canal. One big sprocket at one end under > the turning pool, two smaller ones at the other - ditto, & a couple of idler > wheels to hold everything in shape (coming down the narrow central canal > section) The chain carries a series of rare earth magnets that pull the > barges along thru' the water. > > We did have the whole system operating on cable drive with MDF pulleys (on > spring arms for tensioning) but the customer wants to revert to his original > concept of chain drive. > > Once we get all this sorted it's back to getting the working lock to do just > that (work). And they wonder why men drink???? > > > > Hi Terry, > > > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.