How To ALMOST Cast A Historic Bronze Cannon Barrel... FarmCraft101

[Music] [Music] [Applause] [Music] [Music] [Music] [Music] [Applause] a surprised how many people thought in my last video that I didn't have enough metal to make this pattern this is the same size as that foam cannon I'm gonna put it in this bag because I don't want it to get sopping wet I've got a drain on this bucket right here so it's filled all the way up and I'm gonna put this in and it's gonna push out as much water as its volume plus a little bit extra if any air gets trapped in the bag there we go so let us now push down as much water as it's volume so now I just need to measure how much water it takes to get that back up to the fill mark going one liter at a time so that was 20 300 milliliters so let me do some quick math converting that into cubic inches I get its point of 0.3048 pounds per cubic inch forty two point eight pounds of metal that I need that crucible I had can hold 51 pounds of brass so yeah the crucible did have enough volume now the problem is is I'm gonna do a horizontal pour when I do a horizontal pour I'm gonna have a sprue a pour spout and vents and those are gonna use up metal that's why I had to get a bigger crucible so here's the crucible I used last time here's the new crucible this can hold 51 pounds this can hold 66 bigger crucible man I needed bigger handling equipment I had to make a different lifter because that lifter was too small for the big crucible so I got a new lifter and I had to make a new ring for pouring when I think I'm gonna do is plan on melting about 60 pounds then once I skim off slag I'll end up with 55 and that'll leave me an additional 10 pounds for pour spouts and vents and whatnot [Music] [Applause] really you think over 125 Fahrenheit severe burns oh gosh I better be careful I did get up into the the fill spout it might not have filled the whole thing I'm in the vent - you can see that but I don't know if it filled all the way oh I wish I had just melted five more pounds of metal darn it I'm leaving this sitting out in the middle of the concrete just in case it decides to burst into flames so it's been sitting out here all day and it's just getting to the point where it's not not uncomfortable to touch it's still quite warm I am going to refrain from opening it I will leave it out here all night and we'll open it in the morning I'm concerned because looking down here I don't see image any shrinkage on the horse foul interestingly on the vent it looks like the whole cannon has shrunk if it has to shrink that's the that's the way I would want it to do it I would not want it to shrink in one area like that but the more I think about this the more I think this is going to be another failure so that's why you pour them vertically several people asked about that if you have this thing vertical and you pour it as it shrinks it's going to pull not on from the top it's gonna pull from the center which is the area you're gonna drill out it assures that your breach is going to be a good solid piece of metal here I may have a breach that was molten and then the top shrunk in and that's exactly what I was talking about that's why you don't pour it horizontal start it [Music] Wow it's only 50 pounds 49 9 I thought I had more metal in the crucible than that and while extra metal in the pour would have helped I still would have had problems with it shrinking at the top of the breach here so it is possible to pour this horizontally without the shrinking I know and I'll show you how this is how they would do in the commercial operation got your cannon there's the muzzle so in order to get this to solidify without any void you need a big mass of metal beside it all right let me do a better job of this all right so there's your casting now what you would do is you would make an an in gate here and then you would make a big chamber here just like that you would do a pour spout over here so you would pour here and it would fill up this which would then feed the cannon so this will be the last thing that's molten so that as this shrinks it'll be able to pull from that so this is what's called a gating system so why am I not doing that well I think it's pretty obvious my crucible is pretty much as full as it can get just to make this part so I would need probably double the metal to have a decent sized riser here in order to feed the casting like this if this isn't big it's not gonna stay molten and it won't serve any purpose you know if I made a smaller one that size it's not gonna do anything so that's just a waste of time if I pour this vertically what's gonna happen I'm gonna have molten metal it's gonna cool on the outside the solidification layer is going to slowly rise and come from the outside in and what's gonna happen is the last part to cool is going to be up in here ideally I would have extra on top and this extra portion up here would then act as my riser this would be the last molten area that the casting could pull from this would be the area that solidifies last and what happens there is it moves very rapidly at the end as it cools and it gets lots of tension and stress in the metal you just cut that part off the other thing is the area in here that's going to have the most tension and stress is going to be right in Senate where it cooled last when we're gonna drill that out a lot of people said I should put a core in this well and a core is when you put a cylinder of sand down the center where the barrel is going to be well there's a couple problems with that one that is going to want to float it's gonna be very hard to keep it in there it will also have to be placed perfectly or I'm gonna end up ruining the casting it's much easier for me to put this on the lathe and drill it later and I'll know that I get it in the right spot the other thing is at most I'm going to be making this a one-inch bore I may not even do that it may be 3/4 my core would be half an inch that's just not that much metal it's not gonna save me that much but if I put a half-inch core of sand in there assuming it doesn't break and cause issues in the casting around it and then I dump a bunch of molten metal around it it's gonna float it's gonna want to push up out so I'd have to anchor it down in there somehow while I'm pouring right beside it it's also gonna change the way this thing cools it's just gonna change the the dynamics of the whole thing if you pour it solid and then drill it out you are drilling out the worst part of your casting and you're left leaving the walls as strong as they could be so that's the way to go the other advantage here is I don't need vents I just need a big enough hole up here that I'm not blocking the the poor you know it's like you can pour water into a into a bucket as long as you don't totally obstruct the opening there's plenty of room for air to get out while you're pouring in and I also have to think it's gonna lend to some strength the fact that it's cooling circumferentially it's gonna be cooling from the outside in and that's the same way it's gonna be stressed doing it this way it's it's laying down layers it's going linearly it's not cooling in the way that it's going to be stressed so it just makes sense to me that cooling it from the outside in is gonna lend for a more uniform stronger result so you know one thing I could do I could put this on the lathe and I could turn it down I've only lost like half an inch here so the whole cannon would be smaller I could just bring it down in its dimensions and and just go ahead with it so I you guys if any of you guys think I should do that why don't you just go ahead and and hit that unsubscribe button and hang and go on have a nice day now my goal is to make the biggest cannon I possibly can yeah that's what I'm gonna do I know I'm breaking some of the casting rules and then the best way to do metal casting you know when you're a hobbyist and you're not doing production work you can do that I'm gonna pour this again I'm gonna do it vertically we'll see how that goes was not a fan of the lost foam method some people did give me some really good suggestions you take the foam and you code it was some kind of plaster so that it's more rigid and then you pour into that and I think that would work but that foam stunk in a mixing plaster in with my green sand and you know this worked really well I don't have a bunch of sand embedded in the surface of this so if I Ram the mold well it's gonna work the question is when I'm pouring in in the molten metals falling it's gonna be more than two feet and then hitting the sand at the bottom the sands just not going to be able hold up to that so I've got to find a solution to solve that problem and I've got some ideas but I'd like to hear what you guys think leave comments below and we're going to go for round three on the next video thanks for watching we're getting there [Music] [Music] [Music]

Channel: FarmCraft101

Views: 765,762

Rating: 4.8318067 out of 5

Keywords: bronze cannon, gunmetal, historic cannon, model cannon

Id: 8G37yCbgMzA

Length: 19min 26sec (1166 seconds)

Published: Fri May 03 2019

Reddit Comments

[u/no-mad]

There are a few videos of his different attempts.

[u/YOUREABOT]

Can't wait for attempt #3. I am sure that will be a success.

[u/milw]

Bronze, not just copper?