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The BL-520 Review

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: grock » Mon Mar 30, 2009 1:45 am

@jsr the muzzle break is just to make it look good, makes it look more like a real gun
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Unread postAuthor: MrCrowley » Mon Mar 30, 2009 2:07 am

Nice cannon and nice review :)

Cannon turned out better then I thought.
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Unread postAuthor: jagerbond » Mon Mar 30, 2009 4:34 am

jackssmirkingrevenge wrote:What's the function of the muzzle attachment?


Just aesthetics we are making one that looks like a MK-19 http://wallpapers.free-review.net/24__M ... _40_mm.htm
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Last edited by jagerbond on Mon Mar 30, 2009 3:55 pm, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Mon Mar 30, 2009 4:42 am

Like so?

Image

I would keep the barrel diameter right to the end, in that way gasses can escape through the porting before they can go past the projectile, giving you a genuine braking effect, not to mention cool visuals with the muzzle flash, especially at night ;)
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Unread postAuthor: jagerbond » Mon Mar 30, 2009 3:55 pm

jackssmirkingrevenge wrote:Like so?

Image

I would keep the barrel diameter right to the end, in that way gasses can escape through the porting before they can go past the projectile, giving you a genuine braking effect, not to mention cool visuals with the muzzle flash, especially at night ;)


yes your speaking my language!
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Unread postAuthor: PCGUY » Tue Mar 31, 2009 1:47 am

Wow PCGuy, did you actually purchase this cannon or was it a deal from the site since they are spudfiles' sponsor?


This was a promotional piece, but I am giving an honest review. If I didn't love it I would have said it. It's a true review.

Is the paintjob quality?

Yes, this is a very nice paint job, in fact you could not tell it was PVC unless you knew. Every bit is evenly covered and it has a bit of a texture to it, and it's tough paint.

Wow, sure is sell out in here. Seriously Kyle... isn't this the first spudgun you've fired in a few years?

Otherwise it looks like a nice cannon. looks sturdy, clean, and powerful. How's recoil? Is it centered on your hands? Looks like a shoulder pad might come in handy.

Yes, I haven't fired a cannon in quite a while. This felt really good and brought back many memories :)

But a sellout, what do you mean?

As far as recoil, it is not as bad as you would think. The weight of it takes care of a lot of it, and it's too big to really rest on your shoulder, it needs to go over like a rocket launcher in Halo (it feels like that, since it's so big you can't see your entire right side, like in Halo).

As far as the muzzle attachment, I don't think it does much for the sound. The cannon really isn't THAT loud to start with, I think because of the accurate metering and mixing and the huge barrel, most of the power is pushing the spud and not making noise. The impacts are louder than the shots.
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 31, 2009 2:08 am

Shame you didn't get the rail mounted sight option, it would have been interesting to see how reliable it was.

Given the "shoulder fired" nature of this beast, wouldn't it be better to have a sight offset to one side, like on the RT-20?

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Unread postAuthor: benstern » Tue Mar 31, 2009 3:53 am

PCGUY wrote:
But a sellout, what do you mean?


This is neither the time nor place to discuss that. I was merely making a comment.

Hey pcguy can you do a rough decibel measurement using a microphone taped to end of barrel and a computer?
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Unread postAuthor: starman » Tue Mar 31, 2009 4:04 am

benstern wrote:
PCGUY wrote:But a sellout, what do you mean?


Hey pcguy can you do a rough decibel measurement using a microphone taped to end of barrel and a computer?


No he won't be able to do it like that. He will need an audio db level meter. That means a calibrated microphone and associated circuitry and/or special software. Radio Shack offers themfor about $50.

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Unread postAuthor: mark.f » Tue Mar 31, 2009 9:33 am

Ah, I knew the sound engineer would pipe up before I could. :wink:
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Unread postAuthor: LCTChamp » Tue Mar 31, 2009 7:11 pm

Wow, I really underestimated this launcher. If it can put a potato through one inch plywood, imagine what a golf ball would go through. :twisted:
Previously I said it was overpriced, but after seeing a good review I have completely changed my mind. If I had the money I would by one.
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Unread postAuthor: jagerbond » Wed Apr 01, 2009 3:50 am

jook13 wrote:It is a very slick gun. Much larger than his site led me to believe. I am a big fan of that pump action fueling, Though I would prefer an inline or over under to that coaxal design, it would make the breach loading less work. I guess the coaxal design allows the most compact version of a gun this size.

Again, beautiful work.


Over under set up
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Unread postAuthor: inonickname » Wed Apr 01, 2009 4:13 am

That looks wicked! (asides from a bit of scuff marks). With breech loading and a quicker way to vent the chamber such as a pop vent it would be a true monstrosity..
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Unread postAuthor: daxspudder » Wed Apr 01, 2009 2:48 pm

very nice work, and great use of the ignition assembly... I think mounting the mapp canister on the chamber would be more aesthetically pleasing, and to express my opinion on the fan Im gonna quote the side of a energizer 9v battery..." WARNING: Do not install backward, charge, or put in fire, may explode or leak....blah blah blah" um yeah...
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Unread postAuthor: jagerbond » Wed Apr 01, 2009 4:02 pm

daxspudder wrote: I think mounting the mapp canister on the chamber would be more aesthetically pleasing, and to express my opinion on the fan Im gonna quote the side of a energizer 9v battery..." WARNING: Do not install backward, charge, or put in fire, may explode or leak....blah blah blah" um yeah...


Yeah, I thought too, we put our P-mount in place of the spacer between the clamps and had gas on one side and meter on other. Gun felt fat in my opinion but lots of people liked the setup... This thing weighs in at about 8 lbs and kicks like a mule. The scuffs are from intensive firing 500+ rounds and was our first prototype.
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