Why don't you put it in the tender. Some Brits have been doing that for years, although many British tenders were 3 axles and they were fixed to the tender making the whole situation easier. John T. van Riemsdijk (a well know British Gauge 1 modeler and designer) designed one that Aster used and I believe that he has done this in other designs of his. Obviously, the swinging bogies will cause problems, but you might put an O-ring/chain between one of the axles pairs and put the pump on one of those axles. In fact, the pump could be set in the tender with the O-ring/chain coming thru the tender floor. The output tubing might need to be flexible depending on the pump mount. The input could be a thin rubber or silicon tube. The bypass can then be put in the tender and only one supply tube will be required to connect to the engine. There maybe good reasons not to do this, but don't let someone tell you it won't work because the wheels will slip too much. They might slip a little, but they will pump enough for Gauge 1 operations. Didn't our resident momentum car builder (some Steam in the Garden article) use an O-ring just this way to work the momentum gearing in his car? ( or am I hallucinating? )
Dan Fuller ----- Original Message ----- From: "XXYZ" <[EMAIL PROTECTED]> To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]> Sent: Tuesday, September 02, 2003 10:07 PM Subject: American water pump dilemma > > > > > > Hi all, > > I have run into a bit of a dilemma. I was working on some of the boiler bits > on the American Project and thought it would be a good time to flesh out the > water pump. I am expecting the arrival of my newly purchased O/A torch rig > and that put my mind in the frame to finish the boiler details. I need to > practice A LOT before attempting the prototype boiler, but since the torch > isn't here yet I needed to work on something. > > The dilemma is were to put the water pump. I am thinking that the Dee style > pump set-up would be good but the it looks a bit clunky in the CAD model and > doesn't quite fit. I am also thinking that it may fit to the side of the > burner and inside of the firebox (like the Project loco). > > The downside of the Project setup is accessibility. The room behind the rear > axle is tight on the American and the frame is more open than that of the > Dee. Cosmetically this may look a bit ugly (it may in reality be less > noticeable than on the CAD model). There is also little room for the nose of > the scotch crank. > > I have posted a picture of the loco (see link below) with the Dee sized > scotch crank and eccentric on the rear axle. As you can see the current > configuration for the boiler is trying to share some of the same space. I am > stuck in which approach is going to be the better solution, and am wondering > if I am missing something. > > Tell me what you think. Or if you have any other options that may be more > appropriate. > > Thanks > > Ken > > http://xxyz.home.mindspring.com/american%20main%202.jpg > > >
