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| SpudFarm |
 Posted: 08/03/2009 13:51 PM Post subject: UPGBH10x |
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Captain Slow
Joined: 04 Nov 2006
Posts: 2579
1492.77 Spud Bux
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| jrrdw |
| Posted: 08/03/2009 14:58 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5518
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Currently waiting on a exploding watermellon in slow motion  .
Awwww, poor golf ball  . Nice work Spudfarm. |
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| SpudFarm |
| Posted: 08/03/2009 15:29 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
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| jrrdw wrote: | Currently waiting on a exploding watermellon in slow motion .
Awwww, poor golf ball . Nice work Spudfarm. |
i hope i can get a melon tomorrow
well nice work might not describe it so well, it is a fairly simple design.
but it is fun! 
so what do you think a slug will do to a lawnmower sized engine? |
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| jrrdw |
| Posted: 08/03/2009 15:46 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
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I think if it hits the lower end it with bust right through the casing then hit the crankshaft and stop with damage to the crankshaft  , bust the cast iron flyweight maybe???
Try it and find out !!! Aim for the back of the block it's a flat target. |
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| SpudFarm |
| Posted: 08/03/2009 15:53 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
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mabe the slug spilt into two pieces and make two exit holes
i think i will shoot into thee cylinder from the top and see where it goes from there
I am also going to shoot a big canister of sand with a APFSDS round to see the damage it takes.
If i feel really stupid i might try 10x right besides my own house |
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| theBOOM |
| Posted: 08/03/2009 17:13 PM Post subject: |
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Lieutenant Colonel
Joined: 03 Jun 2009
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Dude this is a beast!!! You should def. chrony it to see what type of speeds your getting with golfballs..Did you sleeve your chamber in something beacause that dosent look like steel on the outside... but maybe thats just me being a noob Anway good video, good music...
Can you maybe add some pictures of your burst disc setup? I've been trying to find a good burst disc setup to use in a mini hybrid I've been planning for a while |
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| SpudFarm |
| Posted: 08/03/2009 17:24 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
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| theBOOM wrote: | Dude this is a beast!!! You should def. chrony it to see what type of speeds your getting with golfballs..Did you sleeve your chamber in something beacause that dosent look like steel on the outside... but maybe thats just me being a noob Anway good video, good music...
Can you maybe add some pictures of your burst disc setup? I've been trying to find a good burst disc setup to use in a mini hybrid I've been planning for a while |
Thank you
I do have a chrony somewhere, it's just been about a year since i last saw it so i have to look for it.
It is steel, sandblasted and painted black. it is also pressure tested to 280bar.
i remember that i made a thread about burst disk holders, that's where i posted it i think. otherwise it is a thread called "ghetto union" or something under hybrid discussion.
its really very simple. its a 2" malleable copuling with about a 1" piece of a 2" nipple in it. then there is a aluminium washer just as big as the nipple part where th burstdisk is seated, one more washer and a gasket where the brass nipple in the cannon can seal and clamp it toghether.
on a mini hybrid you might not need those washers since it has smaller surface area.
well i have decided what tomorrows test will be. I will mainly be concentrating on heavy buckshots inside casings that break open on impact and spread inside the target to make a decent exit wound on something like a microwave.
the doubt i have is in the casing and its strength and the fact that the whole thing can destroy my whole barrel.
the engine is being used in another experiment that i can't mention. |
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| Hotwired |
| Posted: 08/03/2009 17:33 PM Post subject: |
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UK Spudgunner
Joined: 13 Oct 2006
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I've gone off loud music in clips so I skipped to the shot itself each time I rewatched it, I liked the sound it made ^_^
| SpudFarm wrote: | well i have decided what tomorrows test will be. I will mainly be concentrating on heavy buckshots inside casings that break open on impact and spread inside the target to make a decent exit wound on something like a microwave.
the doubt i have is in the casing and its strength and the fact that the whole thing can destroy my whole barrel. |
A can packed solid with sand and lead shot perhaps.
Failing that you could always wind your own cardboard sabots with a roll of brown paper, some glue, a wooden dowel for the core and a wooden plug to close one end. Create partial lengthwise slits in the front section to encourage it to burst on impact. |
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| SpudFarm |
| Posted: 08/03/2009 17:49 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
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Yeah it does make a nice sound
The problem with cans and those things are that they have to fit perfectly in the barrel, Just wrapping it with tape won't do it. it does work in a floppy way with a rag behind it but i want it to go straight
I think the cardboard might be an idea. but for now i just stick to the fast and primitive. If it does not work i will do like you said. |
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| theBOOM |
| Posted: 08/03/2009 18:33 PM Post subject: |
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Lieutenant Colonel
Joined: 03 Jun 2009
Posts: 400
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| Thanks for the fast respond Spudfarm.. I found the thread it looks like a good idea... but I thought.. you did it beacause a normal union would cost to much.. in my case a union would cost less than 15 bucks from a hydraluics store AND it would be rated to 100+ bar pressure.. so I'll just buy one instead of making one... well thats the burst disc setup looking more promosing so far.. but there might be another burst disc setup that I haven't though of yet.. I'll keep trying to come up with one that is fast/ easy to reload and will seal airtight 100%... |
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| SpudFarm |
| Posted: 08/03/2009 19:01 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
Posts: 2579
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| theBOOM wrote: | | Thanks for the fast respond Spudfarm.. I found the thread it looks like a good idea... but I thought.. you did it beacause a normal union would cost to much.. in my case a union would cost less than 15 bucks from a hydraluics store AND it would be rated to 100+ bar pressure.. so I'll just buy one instead of making one... well thats the burst disc setup looking more promosing so far.. but there might be another burst disc setup that I haven't though of yet.. I'll keep trying to come up with one that is fast/ easy to reload and will seal airtight 100%... |
I can't get unions in Norway at that size that is rated for any pressure.
And when ordering from USA i will get NPT threads, that's not what Norway uses. |
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| ramses |
| Posted: 08/03/2009 19:26 PM Post subject: |
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Major General
Joined: 29 May 2008
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| How did you come across the pipe for the chamber? are the end caps welded on? if so, the welds are very clean. |
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| SpudFarm |
| Posted: 08/03/2009 20:14 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
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| ramses wrote: | | How did you come across the pipe for the chamber? are the end caps welded on? if so, the welds are very clean. |
The chamber and barrel comes from Lardas shop. it has 7mm thick walls.
it is a 2" plate that was chamfered (along with the chamber) and the "cliff" formed is filled with steel and then lathed off to make a nice finish. |
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| Killjoy |
| Posted: 08/03/2009 20:31 PM Post subject: |
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Brigadier General
Joined: 11 Nov 2006
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Very impressive Spudfarm. That chamber of yours is probably one of the cleanest and well made chamber on a hybrid I have seen in a long time (I like it as much as Larda's).
Gotta say you never disappoint, hell you brought me out of my non-posting and lurking slump on these forums.
Great job on that cannon! Looking forward to more videos. |
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| SpudFarm |
| Posted: 08/03/2009 20:39 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
Posts: 2579
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| Killjoy wrote: | Very impressive Spudfarm. That chamber of yours is probably one of the cleanest and well made chamber on a hybrid I have seen in a long time (I like it as much as Larda's).
Gotta say you never disappoint, hell you brought me out of my non-posting and lurking slump on these forums.
Great job on that cannon! Looking forward to more videos. |
Thank you really much!
funny you mentioned that, from the start i wantet a cannon that was clean without a ton of wires and propane tanks hanging here and there.
I think i will bring it to the other house we have and shoot it at the highest possible mix I can. probably 9x since the portable compressor limit me abit.
I may have my chrony there to so i can get som readings. It is really hard to get accurate readings when the muzzle is so close th the ground.
If i do fire buckshot i think i will film it in high speed, have allways wanted to see the muzzle blast of it in high speed. i hope there are some flames through the long barrel, but i don't think so.
I can't really promise anything because I allways want to fire at something different.
But thank you! |
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