Saturday, March 28, 2015

Stove number three

It is "Pablofest" this weekend which means I have a full weekend in the workshop with no scheduled interruptions.  I could have done any number of useful jobs but I chose to practice my welding and use up some of my scrap.  If I don't use up my scrap some one may mistake it for rubbish and throw it out.  I have had a compressor tank I found on some ones hard rubbish pile some time in the 90's.  I had always meant to build a compressor but that didn't eventuate so I tried to sell it on ebay but no luck.

Rather than throw it out I decided to build another wood stove.  This one has a vertical fire box leading into a horizontal cook top.  The tank sits on a tripod so it is nice and stable and has an air intake and ash ash dump controlled by simple gate valves.  There is a removable hot plate which can be used to load fuel and a couple of small holes so you can watch the flames flicker.  I have a removable fire grate that sits in the base at 45 degrees to maintain a good air flow.

Seems to work well.

Sunday, March 8, 2015

Wally Mounster

There were a number of very nice small steam launches at Hobart but I had never seen or heard of a steam outboard motor.  This particular example was was for sale and was designed and built by Wally Mounster.  Wally was a local Tasmanian who seems to have been a bit of an engineering legend and deserves a mention in the Tinkerers Hall of Fame.  The other steam launches were also very nice but a bit more conventional.

Tuesday, March 3, 2015

Rolling lift bridges of the world - 2

Imagine my surprise on arriving at Hobart to find a rolling lift bridge almost identical to the one in Auckland harbour.  In Auckland I had no idea how the bridge worked but this time I had a basic understanding so I made an effort to photograph the important details.

Side elevation showing the concrete counterbalance in the elevated position.

The drive shaft and pinion.

The rolling rack mechanism.

The photo of the steam crane is gratuitous.