1/8th Galloway (another one)

[gbritnell]

This is my last hit and miss engine for awhile. It is the 1/8th scale of the Galloway. As can be seen from the first picture it isn't very large. It has a .625 bore and total length is about 6.25 inches. The structural castings, head, cylinder, base and sub-base are aluminum. The flywheels are iron and the small parts are bronze although for the small parts the supplier would be better off to just provide a piece of round stock and a piece of rectangular stock to make the small parts from. They are so small that it's virtually impossible to come up with some way of holding them.
The aluminum is the typical cast material, cuts ok but don't try and file it, gummy. The flywheels are very nice iron.
I'm trying to get it finished by the end of April for NAMES but it's going to be close.
gbritnell

 

[gbritnell]

Three more pictures. Most of the fasteners are marked as fillister head screws but being that they aren't hex bolts to begin with I think I'm going to go with stainless socket head screws.
This engine is designed to have an igniter but with the small size I don't know how well it will work. It can be made but adjusting and cleaning it will be a chore. Has anyone ever seen one of these running with the igniter setup?
gbritnell

 

[gbritnell]

I have just finished the igniter. Boy that thing is small. With electricity, sparks etc. I don't know how well this thing will work but we'll give it a try. Supposedly there is one of these small engines out there that is running so it should work.

 

[gbritnell]

A couple more pictures. The penny gives you an idea of the size. The body is .50 diameter. It has points made from a tungsten TIG electrode.
gbritnell

 

[Catminer]

Hi George;

Beautiful work on the ignitor. The ingnitor for the 1/5 scale Famous uses a .375'' body
and a flange for mounting, it works well.
Hope you can have it ready for Names.

Peter

 

[CMS]

Nice job on the igniter, and the rest of the engine too, hope you meet your dead line. I was hoping to have a second Economy up and running by Spring time, but it's not going to happen. Starting to get nice outside, time to get the big engines out of the barn and ready them for the shows.

Craig

 

[gbritnell]

These next posts are going to be mainly pictures. Everything is finished but the gas tank. I'm going to build 2 tanks, one round one that will sit at the rear of the engine ala Galloway and another square one to go under the base because I don't like the idea of the fuel being above the needle valve. All the bits and pieces work as they should but as with all of these engines the springs will need fine tuning after it gets running.
I changed a number of things with the build, some for simplification, some for practicality and some just because I didn't like how it was originally designed.
For anyone contemplating construction of this little engine you should know that it will take as much or more time than building any of the larger ones. Working with all those small parts requires magnification, at least for me, almost every step of the way.
gbritnell

 

[gbritnell]

More pictures.

 

[gbritnell]

The last pictures.

 

[Catminer]

Very nice work George
Have you tested the ignitor?

Peter

 

[lazylathe]

That looks like a very nice engine!
And i have to agree that ignitor is a piece of art in itself!!! :bow:

Are we going to be lucky enough to have a video of it running??

Andrew

 

[gmac]

Hang onto that Canadian penny George - the government has decided to retire them shortly! Nice work, well presented as always.

Cheers Garry