Metalurgia, forja y fundicion

Last reply by Brother Nathaniel on Thu, 14 Oct 2021 18:52:22 +0000

Last reply by Brother Nathaniel on Thu, 14 Oct 2021 18:52:07 +0000

Last reply by Brother Nathaniel on Thu, 14 Oct 2021 18:51:57 +0000

Last reply by snubnoze on Thu, 14 Oct 2021 18:45:13 +0000

Hi all im just starting on another batch of my little boilers so will record a full build log with plenty of photo's.
This is the boiler as they look finished..

I do make these as finished models and aslo in kit form with preformed can ends. This is how the parts look in the kit form..

For this thread il record the whole process and so will show every step i take along the way.
So here goes it..
First cut stock close to...

Cringle boiler build.

I made one engine using my castings, I always make two sets of castings be cause of its size many parts were fabricated. Its a good running little engine

Hello all... thanks for allowing me in. Though i would share this running before it is remounted on a walnut base. may see it up for sale some day!
Your browser is not able to display this video.

Last reply by edelweiss on Thu, 14 Oct 2021 17:41:46 +0000

Last reply by joe_meadmaker on Thu, 14 Oct 2021 17:37:56 +0000

On another current thread (http://forums.thehomefoundry.org/index.php?threads/replicating-a-motorcycle-intake.1916/) as a sidebar we have been discussing epoxy and polyester as binding resins for cores. I am unaware of much previous discussion of these binders in this forum. So, since tow very experienced folks, Ironsides and Tom Cobett, have provided important information on the subject I decided to make a thread compiling that information here. Otherwise it can be hard to...

Using Epoxy (and maybe polyester) to Make Cores

Last reply by durinnmcfurren on Thu, 14 Oct 2021 17:34:17 +0000

I have a Creality Ender 3V2 that I've been learning the ins and outs of printing on, and in the last few days, it has developed a problem I've never seen before.

No filament sticks to the bed.

In the last few days, I went to make a little tool to hold sand paper onto a crankshaft I'm making. Think of a popsicle stick with a thicker handle at the back. The stick portion is thin, 1/8", and the back handle is 1/2"...

Sudden Problems With my Printer

Last reply by edelweiss on Thu, 14 Oct 2021 16:40:27 +0000

Hung around here last year, and got some great info. Things moved slowly for a while (too many other projects going on), but they are heating up again.

I think I have most of the process worked out, and I've done a few test pours.

By and large, the results are far better than I expected at this point. Here's the one from yesterday, pretty much straight out of the block:

...

I'm Back! Updates and a question

Hi there. I am new to the forum and do love model engines. I got a m16 Chinese model 4 stroke engine which I run on white gas and MMO. I am really entertained by these things. I’ve put a grand total of 36 hours of run time on this little model.
After a nice tune on it, the camshaft has started to wear significantly. Making a big pit in the middle of the lobe.
[ATTACH...

Chinese 4 stroke model camshaft repair advice

Last reply by Brother Nathaniel on Thu, 14 Oct 2021 16:13:15 +0000

Last reply by Lord Newport on Thu, 14 Oct 2021 15:36:24 +0000

Last reply by rimuru on Thu, 14 Oct 2021 15:31:44 +0000

Hello, i am working on sand casting for aluminium products....and i am getting lots of casting defects like shrinkage and warpage, shape deformation after solidification.... anyone one help me out this....that would be great.....!


This above link is my casting defects video..... Can check....

A few years ago, I built my version of an opposed twin i.c. engine. It ran very well, and I was very pleased with it. There was always a problem with the configuration of this engine, because the sparkplugs were at the very bottom of the horizontal cylinders, and if you happened to flood it while starting it, you could crank all day and it wouldn't clear itself. However, it did run, and I made some good videos of it running. The crankshaft was riding on bronze bushings, and the crank wasn't...

A new look at Opposed Twin I.C. Engine