The Wolf Nr 1

[Michael S.]

Hi there,

the boiler is made of steel of the type used in heating construction. A professional welded it. Since the pressure times the volume is still less than a factor of 50 (10 liters x 4 bar operating pressure), this is not a problem here in Germany.
I hope it's still like that. Or the EU has a different opinion. 🙄

I have another photo of the water level indicator here. It's from my big portable engine from Wolf. There was also the indicator. Two signs:
top - highest water level, bottom -lowest water level.

My father built the bikes. He likes to build with wood. It's a simple construction. Not like the old craftsmen. The iron wheel tires are mounted hot. The hubs have bronze bushings.

Michael

[Michael S.]

it continues with the chassis. The wheels are screwed to the boiler at the rear and can be steered at the front.
The plate has a rotation limiter so that the front wheels do not hit the boiler.
Now you can push the machine through the room. 🙂
Need a little pony or two!

Greetings Michael

[Admiral_dk]

What a fascinating and detailed build 

I'm certainly enjoying your build 

Per

[Zephyrin]

a great build, very interesting to see, thanks to share the photographs.
do you plan to steam her or simply use compressed air for demo ?

[Michael S.]

Hi there,

So first there was the idea of ​​operating the machine with coal, water and steam. But from the experience of other model builders, I later found out that there was a problem sealing the copper pipes on the smoke box. The copper pipes get longer faster than the steel boiler. as a result, the pipe ends are leaking.
It would have been better to tap the threads in the pipe wall. Then the tubes can slide in the O-rings. When I found out, the boiler had already been built long ago. I would now have to rebuild all the pipes and the smoke box wall.
But since I also decided to build the machine strictly according to the original, it has become a compressed air steam engine. Haven't heated up until now.

Michael

[Michael S.]

Hi there,

The cylinder block:

The cylinder in the block is flushed with steam. Machining was a challenge for my lathe and milling machine. For starters, I edited the bottom. So that the surface is free of the clamping tool, I milled a recess.
A steel plate holds the block in place and I had room to flatten. Then all other surfaces could be processed. The valve box was milled. For the drilling in the inlet holes I made a drawing from millimeter paper and glued it on. The drill then aligned and then drilled. That worked fine then. 😌
Next comes the drilling for the bronze bushing.

Michael

[Michael S.]

There was a bronze bushing for the cylinder. The pipe was first machined on the inside and then turned to the correct diameter on an aluminum piece on the outside. The cylinder is sealed with an O-ring. The front and rear cover presses the O-ring. With a bronze ring.
The front cover has the hole and seal for the piston rod. The cast iron is equipped with bronze. For better sliding of the piston rod.
The piston ring should be a wide o-ring. I didn't think that was ideal. I bought piston rings from the motorcycle.
39.20 mm instead of 40.00 mm. Slightly smaller but there is still material to drill out when worn. 😉

Greetings Michael

[Michael S.]

It was difficult to mill the curve out of the cylinder. First in steps and with the turning head. The lid has also been reworked. The block is screwed onto the boiler. With a seal. Michael

[Michael S.]

Now the frame and the front support of the crankshaft must be processed.
A sheet metal strip is riveted to the bearing block.
Then it can be welded to the boiler.
I could not use the cast part for the feed water connection. It was not possible for me to attach the radius for the boiler there.
It has been remade from brass. Made of several parts and soldered with silver solder.

[Michael S.]

I wanted to build the piston in the way that is usual with original steam engines. The piston sits on a cone centered on the piston rod. The piston rings from the motorcycle (50 ccm engine) fitted well. First I had done the wrong way of securing the piston nut. I then changed that with a crown nut and splind.

[MJM460]

That’s a nice solid piston rod attachment, Michael.  I like that you have punch marked the orientation for future reassembly if ever needed.

Great machining also on that engine mounting.  A very impressive project.

MJM460

[Kim]

Great job on the feed water connection fabrication. It looks great!

Kim

[Michael S.]

The slide valve is built in and the cylinder block is screwed onto the boiler and the seal is additionally fitted with heat-resistant silocon.
I needed particularly small valves and made a drill for them.
The angle is 4 degrees. Different valves can be built in this way.

[Michael S.]

The next component is the main steam valve. It also carries the valve from the regulator.
Now all fittings are on the cylinder block.


Michael

[Admiral_dk]

Fantastic attention to details 

Per