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Just Went Mach 1

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Just Went Mach 1

Unread postAuthor: MrCrowley » Fri Sep 11, 2009 1:54 am

According to HGDT, I've just broken the sound barrier with a 4 gram, 10mm, steel bearing in my hybrid The M480. HGDT says 400m/s but to be honest my mixes were running a bit rich for some odd reason (had it perfected a few months ago).

Anyway, just thought I'd express my joy, I've finally become a man :D

Complementary video - Shooting at a stainless steel pot lid with 3/4" MDF behind it (penetrates both):
[youtube]http://www.youtube.com/watch?v=c6P2gN9EtpY[/youtube]
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Unread postAuthor: jmadden91 » Fri Sep 11, 2009 1:58 am

Congratulations mate!! Very impressive :thumbup: :thumbup:
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Unread postAuthor: POLAND_SPUD » Fri Sep 11, 2009 3:11 am

Anyway, just thought I'd express my joy, I've finally become a man
ohhh... wait a second... do I get you right ?? you did it with a spudgun ?? :shock:



now seriously... I am impressed :wink:
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Unread postAuthor: Moonbogg » Fri Sep 11, 2009 4:25 am

Wait, you didn't verify it for real? If thats the case I went supersonic as well with a golf ball at 3X a long time ago! Still cool anyways. Your gun sounds loud and powerful.
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Unread postAuthor: jackssmirkingrevenge » Fri Sep 11, 2009 4:51 am

If you were closer I'd buy you a beer :D
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Unread postAuthor: MrCrowley » Fri Sep 11, 2009 7:16 am

Moonbogg wrote:Wait, you didn't verify it for real? If thats the case I went supersonic as well with a golf ball at 3X a long time ago! Still cool anyways. Your gun sounds loud and powerful.

Well I don't have a chrony but I trust HDGT not to be 70m/s off, the parameters are pretty straight forward. Might buy a chrony soon though.

@JSR,
I'll take a raincheck :D

ohhh... wait a second... do I get you right ?? you did it with a spudgun ??

Well, when a man loves his spudgun, he and the spudgun get together... :wink:
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Unread postAuthor: D_Hall » Fri Sep 11, 2009 8:47 am

Schaweet.

Note that you didn't get all caps or an exclamation point because you haven't yet purchased that chrony. ;)
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Unread postAuthor: niglch » Fri Sep 11, 2009 9:47 am

That is pretty nice.

Just out of curiosity, did you use all steel fittings for the gun or are they galvanized iron?
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Unread postAuthor: Technician1002 » Fri Sep 11, 2009 10:56 am

@MR Crowley, Please post a screenshot of HGDT. I would like to see the parameters used. Thanks and Congrats. :D In theory I've done it with a marshmallow, but haven't clocked it.
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Unread postAuthor: MrCrowley » Fri Sep 11, 2009 3:51 pm

Technician1002 wrote:@MR Crowley, Please post a screenshot of HGDT. I would like to see the parameters used. Thanks and Congrats. :D In theory I've done it with a marshmallow, but haven't clocked it.

Here you go, Tech :)
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Unread postAuthor: Brian the brain » Fri Sep 11, 2009 4:09 pm

Congratulations C.!!


Does this mean I'm a little girl?

:oops:
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: MrCrowley » Fri Sep 11, 2009 4:13 pm

Brian the brain wrote:Does this mean I'm a little girl?

Not with the cannon beasts of your creation :shock: :D


BTW, I may be able to get hold of a 30mm or 40mm steel bearing, my next goal is the 2000 joules mark. :)
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Unread postAuthor: THUNDERLORD » Fri Sep 11, 2009 5:05 pm

...BTW, I may be able to get hold of a 30mm or 40mm steel bearing, my next goal is the 2000 joules mark. ...


Maybe one of those chinese chrome balls for hand exercise,
only filled with lead (they come in different sizes).
Been dieing to see someone launch a trailer hitch ball,
smallest size is like 1 7/8" though, but they are diabolo shaped.

Awesome shot, (been waiting for a barreled vid).
Not much view of "The Garage",
But indoors... :shock: 8)
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Unread postAuthor: Technician1002 » Fri Sep 11, 2009 10:33 pm

Been dieing to see someone launch a trailer hitch ball,
smallest size is like 1 7/8" though, but they are diabolo shaped.


Bring one over and shoot it yourself. :D It'll fit fine. I can find lots of space nearby and I have compressor, will travel. :D I don't have a trailer hitch at the moment. lost it somewhere.
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Unread postAuthor: MrCrowley » Sat Sep 12, 2009 12:47 am

Well my copper barrel had to lose 30cm today (long story) but luckily I found the same diameter pipe under my house and cut myself a nice 130cm long barrel.

I was also having trouble bursting 4 disks at 8x, so I decided to pump up one disk and see how high it would burst. Got up to 260PSI before it started leaking, no wonder I wasn't bursting 4 disks at an 8x mix.

So I tried another shot similar to the ones above with my new 130cm barrel and 600PSI+ bursting disk pressure, HGDT now says 527m/s :shock:

Video soon, nothing special though. This time it went through a metal muffin tray, the stainless steel pot lid and 3/4" MDF before stopping in a compacted towel.

Edit:
[youtube]http://www.youtube.com/watch?v=xjX7jvaxFeI[/youtube]
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