April 24, 2005.
more of the Engineman's ..............................................................................................................................



C onstructed in the Spring of 2005.

Click Here for the story behind this powerful handful on my new site .

Sometimes my "latest" projects are really just old long-term endeavors which have been running concurrently with many others that now are finished.   I guess projects like this are both Old and New.

My all-metal Steam Tugboat is one example and I put most of my spare time on it in the Winter of 2002-03, to see how much I could get done.  I have started posting pictures on a new section of this site.

As it seems to be the time for displaying unfinished projects, the rough beginnings of a miniature tandem Buffalo Springfield Steamroller have begun to appear on yet another Engineman page.   Like the tug, this model was started years ago, and although it was set aside temporarily, I have never lost interest.   It sits on a shelf over my desk as a "beacon", which has seen me through some particularly tough spots in other projects - ones that have long since raced the old roller to the finish line!

Having purchased a new micro mill recently, I was anxious to try it on something that I couldn't previously have managed easily with my lathes.  A miniature model of a Taig lathe was my choice.

Tugboat      Steamroller      Tiny Lathe

The above links also appear at the bottom.

Below are some shots from my more recent shop projects - I will try to add a few to these periodically when I have something new to show.   - John

ABOVE:  A four-inch custom Dividing Attachment under construction to fit the Busy Bee 7" x 8" lathe.  The rough "pewter-like" appearance in the picture above is a result of scanning it directly instead of using a digital or 35 mm camera.  In real life, the finish is actually is bright shiny steel.

This attachment is very quick to mount on the lathe.  So far it seems to work quite well, coupling to the existing 45-tooth gear on the lathe spindle.  Many divisions are possible with an 8-hole row in the disk, but early calculations suggest that a 56-hole row will produce the most combinations from a single row under 60.  The first plate is now complete and contains five different hole rows:   8, 32, 44, 56 and 60.

A view showing all the rows...

BY THE WAY...  I was unable find any information on the Web about dividing by using a 45 to 1 worm ratio.  I have written two very simple programs in old-fashioned BASIC to yield all the possible divisions from any number of holes, and how many turns + holes are required for each division.  I am no Newton, but they do work.  One of the programs samples a lot of number combinations, so it can be slow on the older computers, but a modern PC with BASIC installed will do it in a flash.

ABOVE:    A one-inch diameter test piece made in the 7" x 8" lathe using the new dividing attachment.  

The view below is an embryo Stainless Steel steam globe valve, in the making, for my new Overcrank Colliery Engine. You can see how it looks mounted on the engine in the last picture.

BELOW: cylinder drain cock also made from stainless steel

UNDERNEATH: piston rod

ABOVE LEFT: side view of the columns - RIGHT: the nearly-finished cylinder.

BELOW: underside of cylinder and steam chest

Crank, cylinder and pulley

BELOW: cast iron steam chest cover and steam flange (highly enlarged)

These "pictures" are actually scans done on a standard flatbed scanner. The exaggerated texture and apparent "crookedness", especially in the picture below, is caused by scanner distortion.

BELOW: the unfinished 19th-century Overcrank Engine temporarily erected on an steel plate.

This engine has progressed considerably since I scanned the above shots.   The three photographs below show it in the finished state.
  - John

This Vertical Colliery Engine was completed in early May, 2002.

Keep watching my latest pages about the continuing saga of the construction of my 60-pound, hand-riveted Aluminum Tugboat - they will be short pages about a long story!   The pages, like the boat, are themselves under construction.

Tugboat    Steamroller    Back to the Engineman's Home Page

All rights reserved. (c) 2003 John R. Bentley.