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Looks like your down comers and mud drums are on the small size when you add the rest of the tubes.

Here is you drawing done in Solid Edge that is free. Dave

Glen Why the ban on live steam boats on the pond? Dave

I'm also a Alibre user form day one. Found a big error in the Holt 75 paper drawings I have. Would of found it when I build the engine but maybe not until I had made a rather costly mistake machining. Dave

When you do a part count and all the machining and fitting that has to happen I think you would have to work 24 hours a day and then I don't think you'll get it done in a week end. :o Dave

Yes In the QUORN Universal tool and cutter grinder book by Professor D H Chaddock the designer of the Quorn on the last 2 pages of the book he shows the head on a lathe tool post and on a vert mill being used as a surface grinder. I have taken pattern making classes from Gary and his castings...

Brian You can see the thread for the model stern wheeler here. http://www.rcgroups.com/forums/showthread.php?t=1497645 You can see the tread for the model Zdrives here. http://www.rcgroups.com/forums/showthread.php?t=1485490 As you have learned from the links you found Zdrives are used in...

Brian In North of PDX in Ariel WA. I try to make it to the Portland Model Engineering club meeting. I've not been to the Steam up in several years. I'm presently woking on a steam engine for a RC model stern wheeler being built here is WA. Also doing RC scale model Zdrives for model tug...

Is it possible that this is the Holt tractor that Jasonb in post #19 posted a link to. The photos were taken at the 2011 GEARS show in Portland Oregon. I have flipped back and fourth between my photos and the ones in the link. I think I can see the same crinkle in the roofing on the front left...

Melt that puppy down and cast lots of new stuff from it. Old cast aluminum makes good stock for casting new parts with. Easiest way to get it to small enough pieces for your crucible is build a nice hot fire around it after taking all the steel out of it you can. There is a temp called hot shot...

Martin model and patterns here in the PNW has castings for model engines and home shop equipment. http://www.martinmodel.com/MMPengines.html Dave

From the Willamette Iron & Steel Works 1925 catalog they were using the same principal on there donkey winches used here in the PNW. Here is a scan of there friction device. Dave

Finding the steps in machining a raw casting can be fun. Here are a couple of shots of a casting for a gear box for a Zdrive we are developing. It took three set ups to get to this point. Have at least three more before it is finished. Dave

Bovine I think you have your cubic inches per cubic feet wrong. 12X12X12 =1728 cubic inches per cubic foot. When I run the numbers I come up with .69 cubic feet for top and bottom and .92 cubic feet for body. Dave

PLA is a PITA. pla will swell when heated and if you stop the print for any reason and do not lower your hot end temp the heat migrates up your teflon tube and swells the pla causing a blockage. Easy answer is change to ABS and a heated bed. A good forum on 3D printing is here...

Nick Did a search on those end mills. Expensive is an under statement I think you could buy gold cheaper but it does not make a very good end mill. I think I am working with small end mills at 3/32" but they are giants by comparison. Dave

It must mean I have the disease also. 2 lathes, 2 vert mills 1 with CNC, 1 horz mill, 1 shaper, 1 surface grinder 1 mini CNC router plus a complete wood shop. Dave

Danny I'm in SW Washington and talk with Pete via Skype on a regular basis. I'm working on a steam engine for the model of W.T Preston that Mike in Auburn WA is building. Dave skype name dave.sohlstrom

Nick We need an update. I know I am going into withdrawal. I tried to find information on Kolper 7 but came up with nothing. Dave

When you get the mill do not trust your ears and eyes for speeds and feeds. Get a copy of Gwizard and plug in all the data to figure out the best feed and speed for that end mill and material. Also invest in machinable wax for doing test runs. You can save a $20 end mill if your Gcode does not...