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What was the mold shrinkage % after curing and casting?

This may help......or confuse the heck out of you.....so many ways to fry an egg you know. http://www.lab.kochi-tech.ac.jp/oka-lab/society/ron_pdf/okalab20111114_3C14.pdf

Lets use the way back machine.......... https://www.homemodelenginemachinist.com/threads/boiler-explosion-what-not-to-do.7280/

How is the crank lubricated........cant get my head around how it didn't just seize up with an open crank case and what looks like no way to lubricate all the bearings.

I'll just add this to a reason never to use soft solder on a boiler.......it melts when the boiler (if the boiler) ever runs dry. The next run will probably not be without a few leaks at best.....or a catastrophic failure. Sorry if I seem to be a party pooper to soft soldered boilers, but a...

Google this, Model Boilers and Boiler Making.pdf It will give you a good start, and worth the $25 or so on Amazon

learn to silver solder.....PLEASE..... Its not worth the risk to soft solder a boiler, even if the intent is to run low pressure. It only takes one failure of a critical part to make a fun hobby into a trip to the hospital.

Blasphemy......but imagine the time it would take via 3D printing.....

Easy....just I am not sad....lol Lyrics I belong, a long way from here I put on a poncho and played for mosquitoes And drank 'till I was thirsty again We went searching, through thrift store jungles Found Geronimo's rifle, Marilyn's shampoo And Benny Goodman's cursive pen Well, okay, I made...

That is a beautiful launch!!!! Well done, I would love to see a build log on that.

You got it....that's what it means

https://www.pdfforge.org/ sorry about that

PDF Forge, https://www.pdfforge.org/.....best free PDF creator I have used, it acts like an installed printer but makes PDF files for you

That is a very cool looking engine, nice work!!!

PotY next, this is the best build ever!!!

Of course, build of the month.......Year.

P-40 War Hawk P-38 Lightning M1A2 Rifle, built at the International Harvester Factory

Just outside on a break from work......our place is next to an airport full of older aircraft. As I am sitting there a MkVIIII Spitfire takes off, I have seen plenty sitting static at museums and such, but never before heard one flying........oh my god, I want that engine in my car......its...

Waterless coolant is the solution.... http://www.evanscoolant.com/how-it-works/ "Water contains oxygen, which causes corrosion and also allows electrolytic activity which further damages engine metals. Evans waterless coolants eliminate corrosion and electrolytic activity, significantly...