Metal Casting at Home Part 20. Hit & Miss Engine Cored Cylinder .

[ray5961]

Does the core automatically center itself when you pour the metal? Or do you have to do something to ensure it's centered with regard to the walls?

[myfordboy]

@ray5961 For a detailed explination please visit myfordboy.blogspot.com and look at the Metal casting tips and FAQ page.

[ray5961]

@myfordboy - Between your page and googling "core prints" I was able to understand how it's working. Thanks!

[3goldy]

Can you avoid that thin line in the middle?

[myfordboy]

@3goldy You always get a line where the mould parts but it is easily removed with a file. This is a feature of full size engines you can always see the mould lines.

[eli5771]

is that green sand easy to find? or do you make it from other sand? just subbed your sight, so i haven't watched all yet. you may have answered this already.

[myfordboy]

@eli5771 Can be made but mine is bought.

[Furbolg123]

skills

[MrGerpster]

I hope this is an olds GEARLESS. But I have been wrong before !!! Beautiful video how to I might use it someday

[myfordboy]

@MrGerpster Yes, this is the Olds gearless engine.

[123renigade]

is it expensive?i want to try it eversince i was a child, but dont know where to start

[lexichronicle2]

@123renigade "is it expensive?i want to try it eversince i was a child, but dont know where to start"

Check out the books by Dave Gingery. They're real cheap and short, and nice to read. Also try Hobbicast on the Yahoo groups.

Excellent work Myfordboy, that was a pleasure to watch!

[HomeDistiller]

do you just add the core sand back into the green sand?

[myfordboy]

@HomeDistiller No. The core sand is just plain sand from a builder supply, like you would use to make motar for bricklaying. I don't want that stuff in my greensand.

[ulujm]

I am confuse when you put the core it touch the bottom so the metal will not go between the bottom mold and the core where it's in contact. Am I clear?

[myfordboy]

@ulujm The core does not touch the bottom. I have given a detailed explanation of the process in my metal casting tips at myfordboy.blogspot.com

[ulujm]

@myfordboy

ok i;ll check the vid. so when you put in place the core it has to be perfectly place in the axes. Since I can see you does by eyes I suppose there is room for error

thanks

[MrSpad007]

i hear by declare the red handle screwdriver shank fully seated in handle

[lexmark136]

Epic slingshot,  that should be able to reach a few neighbours over.

[Sandcastlechampion]

Hi, another great video thanks-birdsong is definitely a highlight in these videos, and isnt a hammer just a hammer?! I like the idea of putting that runner across the two feet, i guess this really helps the metal flow and the feeder coming up from this crossbar helps prevent shrinkage in the legs? I always find gating the most difficult part of casting and i'm sure that bad gating is the reason many of mine fail so thanks again for uploading you knowledge!

happy new year,

Stuart

[Sandcastlechampion]

Hi, another great video thanks-birdsong is definitely a highlight in these videos, and isnt a hammer just a hammer?! I like the idea of putting that runner across the two feet, i guess this really helps the metal flow and the feeder coming up from this crossbar helps prevent shrinkage in the legs? I always find gating the most difficult part of casting and i'm sure that bad gating is the reason many of mine fail so thanks again for uploading you knowledge!

happy new year,

Stuart

[BITTYBOY121]

Hey David...Just managed to watch this video you were saying about in your e-mail, This is just brilliant, A great honest example of metal casting with a superb end result :-)....Now back to the drawing board rebuilding my furnace - Will let you know the details soon ;-)

[myfordboy]

@xa222e Its a real Estwing. You can buy them here. Best hammers ever.

[gblpst81]

Happy new year! Great video as usual. I was wondering how often you run into a mistake like that and have to start the moulding process over. I really appreciate you demonstrating what can go wrong in the casting process. It's helpful to know what to watch out for and what to expect. I'd love to see more machining videos when you have time to make them, and of course any videos of the finished engines would be great to see as well. Hope you're well and 2011 is a good year for you. Take care.

[myfordboy]

@gblpst81 Thanks for your comments.

Next video will be casting and machining a cylinder head start to finish.. I have videoed the first part but haven't cast it yet.

[fly2000jtb]

Now that was cool leaving in the mistake to show how to do it right even if you make a mistake. Is it better to remove the sand hot or are you just like the rest of us out here and cant wait till it cools all the way down? Cool ideo too Joseph T fly2000jtb

[myfordboy]

@fly2000jtb Cant wait !!

Once its solidified I like to expose the metal otherwise it would take forever to cool.

[Vergil1Dante0]

@myfordboy About how long does it take to solidify?

[Dach101]

great vid. I have a question , with the feeder you cut the inlet into the smaller section of the pattern, is this to help flow? How important is the placement of the feeder? Also have you tried putting talc into the sand after you remove the pattern. I remember it helped smoothnesss on the core mold you did.

[myfordboy]

@Dach101 Good practice is to feed into the larger section of the mould to help with shrinkage and metal flow. In this one the feeder goes into the cross piece between the "legs" of the casting. The cross piece is in fact part of the ingate and is removed later. so I am realy feeding into the 2 legs which are of a large section. The finsh is good from the sand , I haven't found it necessary to coat it with talc, it would be eay to damage the mould too.

[Dach101]

@myfordboy thanks for the reply. I saw that you removed that feeder bar later, was wondering if the thickness might have effect on the pour. Doesn't seem to on yours. Thanks again for the vids, very interesting.

[glazkinsergey]

Where I can read more about this work? Very interesting see full engine project...

[myfordboy]

@glazkinsergey I would recommend the 2 books by B. Terry Aspin. This is where i learnt most of my stuff.

[glazkinsergey]

@myfordboy thanks, I read this book necessarily.

Happy New Year!!!

[xumuk3]

Oh, One more thing!

Happy New Year! :)

[xumuk3]

Thank you for your videos!

Best of all I like moments when you are removing hot parts from smoking sand.

It's like a kind of magic! :)

[junkman6261]

I always love your videos!!! Can you keep us updated on the progress with more videos? One more video request, I would love to see the Stickney running once completed.

[myfordboy]

@junkman6261 Stickney is finished and has run but needs a bit of tuning. I will post video when I am happy with it.

[apowellz]

Once again, very enjoyable to watch. Interesting casting and I am looking forward to the engine it will result in.  Nicely done - those some noisy birds.

[svenp]

Beautiful work, especially the patterns.

[RobRichmondRPG]

Excellent craftsmanship David thank you for all the videos, I am ready to see what you create in 2011! By the way very impressive bird imitations as well, where did you learn to whistle like that? ;)

[rollerpodger]

beautiful work cheers for the vids

[JCLabs]

Every time I see a new casting video from you I get all excited like a kid about to open a present on Christmas. Thanks for all your videos and have a Happy New Year! :)

[EarlRausch]

@JCLabs

I know what you are saying, I am the same way.

Myfordboy has some of the best videos, They do inspire me

[snoopdog68]

most the casting needs to be in the drag and not the cope, you labeled it incorrectly.

[myfordboy]

@snoopdog68 Not so. The lower flask is called the Drag. Top one the Cope.Thats what we call them them in the UK.

[85rocco]

@myfordboy

It's the same here in North America too.

Anyways, as always, brilliant video.

[ISUZU1987]

. happy new year myfordboy

[ISUZU1987]

. happy new year myfordboy

[robot797]

what will this engine cost when its done

i would like to buy one!

[myfordboy]

@robot797 Sorry not for sale.

[hobomnky]

hmm we call a green board a black board and black sand green sand

somethings wrong

[refa42]

@hobomnky Seems odd yes. I don't know why black board is called that way but greensand is called _green_ sand because it's used moist. Molding sand (greensand or petrobond) takes black color in use because of burning, even if the color were green to begin with (which it usually isin't, even with olivine sand base).