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Sureshot BL-625 action video

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: jook13 » Sat May 02, 2009 2:24 am

That is going to be so burly!
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Unread postAuthor: USGF » Thu May 14, 2009 1:02 am

JSR, Found some time to set up the pour. We had to heat the molds to around + 375° F before the tail started to fill nicely. Note the 9 volt battery and .177" (4.5mm) pellet in there for scale. Also a 2" UHMW blank for a pneumatic round we are planning. Oh, one of the first pellets that did not fill 100% was cut in half to show the skirt profile.
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First pour of 1.6" lead rounds
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Unread postAuthor: jackssmirkingrevenge » Thu May 14, 2009 1:27 am

*Expletives scarcely repeatable in polite company*

:shock:

Beautiful, have any been fired yet? What does it weigh compared to a typical potato slug?
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Unread postAuthor: USGF » Thu May 14, 2009 1:33 am

Action / damage video will be posted later when the new coaxial pnuematic gun is introduced.
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Unread postAuthor: USGF » Thu May 14, 2009 1:36 am

Math says it should weigh .811 lbs, or about 368 grams.
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Last edited by USGF on Thu May 14, 2009 1:37 am, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Thu May 14, 2009 1:36 am

Looking forward :) I take it the prototype Mike was telling me about worked well then?
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Unread postAuthor: USGF » Thu May 14, 2009 1:41 am

The things you can do with a large machine shop. Yes, "It" does work well but there are a few technical issues. I do not want to steal his thunder. Another thing, I made the pellets to 1.5 sched 40, his test gun has an aluminum 2" sched 40 barrel. Oh well. When the VMC is open, there is a larger mold gonna be made...
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Unread postAuthor: jagerbond » Thu May 14, 2009 4:54 am

Those "pellets" are amazing. With the weight of the 2" bore pellets nearing 1 lb and the new prototype easily running 200PSI (max current shop pressure) should be some serious energy. Replacement O-rings should be here soon!

I like that you included the UHMW slug.

USGF can you post the 20 minute ghetto dart from earlier?

Mike
Sureshot Inc. / http://www.ultimatespudgun.com
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Unread postAuthor: USGF » Thu May 14, 2009 5:17 am

This was NOT made by USGF
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Unread postAuthor: jackssmirkingrevenge » Thu May 14, 2009 5:42 am

haha!

ghetto but I bet it works, any damage pics?
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Unread postAuthor: inonickname » Thu May 14, 2009 5:48 am

jackssmirkingrevenge wrote:
inonickname wrote:Unfortunately unless your going supersonic it will be rather inefficient but oh well.

Image
(WRI)
1. Is for subsonic flight
2. Is for supersonic flight
3. Is for hypersonic flight


I beg to differ ;P


I'm not sure about that really. The variance of slight changes and velocities plays a large part. Though however, when testing water rockets (same rocket, just different nosecone) the performance was greatly improved (max altitude) with a semi spherical leading edge. Though whatever works for you.

I bet those slugs would be awesome though..beautiful work on them. Destruction evidence shall be appreciated..
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Unread postAuthor: Moonbogg » Thu May 14, 2009 9:03 am

Oh dude...this is a little too cool to be real. I wonder how straight they will fly without rifling. I want one!
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Unread postAuthor: USGF » Thu May 14, 2009 7:16 pm

I wonder how many out there have experience with pneumatic intensifiers? We have endless 125 PSI shop air. So, with a 2.2 to 1 intensifier, we should easily see 250 PSI. Got most everything off Ebay. We will build one soon.
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Unread postAuthor: jagerbond » Thu May 14, 2009 7:26 pm

jackssmirkingrevenge wrote:haha!

ghetto but I bet it works, any damage pics?


Hit the edge of a small c channel and left a endmill shaped crater. We will re-load and get a nice shot off on larger target.

Mike
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Unread postAuthor: Moonbogg » Thu May 28, 2009 10:25 am

USGF wrote:JSR, Found some time to set up the pour. We had to heat the molds to around + 375° F before the tail started to fill nicely. Note the 9 volt battery and .177" (4.5mm) pellet in there for scale. Also a 2" UHMW blank for a pneumatic round we are planning. Oh, one of the first pellets that did not fill 100% was cut in half to show the skirt profile.


Will these molds be for sale at some point? Or would I have to come to you as a client? If for sale, any idea on a general price range for say a mold for 1 1/2" SCH10? I would love trying different materials to make the pellets out of. I have a rifled barrel that would be wicked with wax pellets or a more durable yet soft material.
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