A tiny 3 Cylinder Holt based engine

[gbritnell]

The water will enter at the bottom right corner of the pump and come out the top left. I bent a piece of 1/8th brass tubing and put it in place to see what I needed for the upper connection. The lower connection will be with a piece of neoprene tubing.

[gbritnell]

Here's a shot of the finished radiator mounted on the frame. I made the filler cap by turning and threading the filler plug then cross drilling it for the ball ended handle. The trick would be how to ge the handle through the cap and have the balls on each end. I turned the shaft, .047 diameter with a short length of .04x.070 at the end. Before cutting if off I left enough material to form the ball on one end.
I mounted the shaft in a home made reducing sleeve and formed the ball end. The ball for the other end was drilled .04 then shaped as closely as I could get it prior to cutting it off. Once cut off I pressed it onto the shaft then filed the remaining material into the conical shape. Needless to say with the tiny size of the ball I lost couple of them before getting on onto the shaft.

[crueby]

Stunning, as usual!   

Maybe in a week the shop elves will bring back those other ball ends...

[ShopShoe]

The detail of these parts is astounding (and outstanding).

I always like your radiators: This one is even greater with the ball-handled cap and "HOLT" on the tank.

Thanks for inspiring the rest of us.

--ShopShoe

[Doc]

Haha I can relate to loosing parts trying to get them assembled. Things are really looking good your work continues to impress me  I know I don't post enough but never the less I am following along.

[Roger B]

Excellent as ever      I do think that we need a "Swarf Gnome" emoticon on here as I have also lost several small balls and springs in the last few weeks 

[crueby]

Excellent as ever    I do think that we need a "Swarf Gnome" emoticon on here as I have also lost several small balls and springs in the last few weeks 

Need a version with the Monty Python foot coming down on the shop gnome...!

[ShopShoe]

"Need a version with the Monty Python foot coming down on the shop gnome...!"

Or the 16-Ton Weight or the Giant Hammer.

ShopShoe

[fumopuc]

Hi George, again a masterpiece. A fantastic model engine. Thanks for sharing with us.

[gbritnell]

The engine is finished. I only have to put the O ring drive belts on the pulleys but Stock Drive Products is out of stock at the moment.
I ordered the 1/8th cast fittings from PM Research and made up a fixture to hold the elbows for machining. These were soldered to the existing piping and then neoprene tubing was cut to join everything together. I made small hose clamps for both the coolant tubing and the fuel lines although they are both different sizes. The ones for the coolant tubing are .187 I.D. and are .012 thick and .070 wide. I made the rings from stainless steel and the threaded pieces from brass. In the past I have used brass for both but after silver soldering the rings get extremely soft and distort. The screws are M1.0x.25.
I made the pulleys and mounted them on the crankshaft and water pump. The other pair of pulleys was mounted to the front of the flywheel and to the fan. The bracket for the fan was milled from one piece of aluminum.

[b.lindsey]

Stunning George not to mention inspiring!!!  Once you get the O-rings and hopefully make a video, please add the finished pictures and video to the showcase section too if you don't mind.

Thanks for taking us along on the ride for this one!!  Any other small projects in the works??

Bill

[Admiral_dk]

Another Master Class project from you George - very impressed as always 

[rarach22]

an incredible beautiful model......Pavel

[10KPete]

George, you've done it again. A beautiful little engine. Congratulations!!

 

Pete

[rudydubya]

Extraordinary.

Regards,
Rudy