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lego sight

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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lego sight

Unread postAuthor: Demon » Mon Oct 20, 2008 2:46 pm

I just builded this 5 minutes ago and it is pretty simple:

4 degrees of angle and 2 of wind deviation

To aim in front of you, look in the first stage of the brown"tower" and in the middle of the blue lego piece.

To aim far, look in stage 2,3 or 4 of the brown "tower"

To calculate wind deviation, look in stage 1,2,3 or 4 of the brown tower(depends of situation)and one of the left or right hole of the blue lego piece.

If you dont understand just ask.
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IMG_6413.JPG
The potato trajectory calulator on my Willi Waller.(the valve is broken).
IMG_6412.JPG
The trajectory calculator.
Last edited by Demon on Mon Oct 20, 2008 3:18 pm, edited 1 time in total.
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Unread postAuthor: mark.f » Mon Oct 20, 2008 3:02 pm

Why not call it "lego sight"? I was thinking you had built some mad contraption of slide rules and indece markers using legos...
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Unread postAuthor: littlebro05 » Mon Oct 20, 2008 3:45 pm

Oh mad! lol, lego sights = ghetto yet creative.
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It's Nerf or Nothing.

Don't start crying when I play this as my hobby, Paintball, Airsoft and Nerf are equally good hobbies, except you can play Nerf in public. Good day! Hmph!
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Unread postAuthor: TurboSuper » Mon Oct 20, 2008 4:07 pm

Haha...Willi Waller. Great name for it.
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Unread postAuthor: rp181 » Mon Oct 20, 2008 4:25 pm

does it work?
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Unread postAuthor: jackssmirkingrevenge » Mon Oct 20, 2008 10:54 pm

Interesting, however the front and rear elements are too close together for the system to be practical.
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Unread postAuthor: starman » Tue Oct 21, 2008 1:52 am

jackssmirkingrevenge wrote:Interesting, however the front and rear elements are too close together for the system to be practical.


True, however, it's not like a typical spudder like this offers any significant level of accuracy or consistency, so it's likely this apparatus will offer a basic "broadside of a barn" opportunity.... 8)
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 21, 2008 5:49 am

Fair enough, though there you have around 30º range of windage, and the sort of elevation that one would find on a grenade launcher :roll: unless you're shooting lead bricks in a hurricane I think one would appreciate greater separation that would allow for finer adjustment of aim.
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Unread postAuthor: Demon » Tue Oct 21, 2008 5:53 am

What you see is the "old version",now i had added a movement so you can pull down or up the rear sight, like in real guns 8)
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Unread postAuthor: CasinoVanart » Tue Oct 21, 2008 7:29 am

jackssmirkingrevenge wrote:Fair enough, though there you have around 30º range of windage, and the sort of elevation that one would find on a grenade launcher :roll: unless you're shooting lead bricks in a hurricane I think one would appreciate greater separation that would allow for finer adjustment of aim.


Bwahahahahahha :D I thought square projectiles were out due to surface area problems...That's assuming a square brick

Now shooting anything during a hurricane would just be plain irresponsible, especially if one were going for a distance shot in a field were mice might be hiding. (or forklifts for that matter) :roll:
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 21, 2008 8:22 am

CasinoVanart wrote:I thought square projectiles were out due to surface area problems...


They could be saboted ;) though for a given calibre, a square section barrel would have 27% more available area (and therefore power, since power is pressure x area) than a circular section one - and since we're not dealing with extreme pressures here, I'm surprised it hasn't been done before.

Now shooting anything during a hurricane would just be plain irresponsible, especially if one were going for a distance shot in a field were mice might be hiding. (or forklifts for that matter) :roll:


Class :D and stop shedding tears over that hapless forklift :p :)

Oh, and Demon, booo! to all the dead space in your cannon! And what exactly does the suspiciously double entendre moniker signify?
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Unread postAuthor: Demon » Tue Oct 21, 2008 3:04 pm

I am not sure i am going to buy one if it cost too much ,but do someone know about a cheap distance calculator?

I would like to build an super-accurate angle calculator to hit the cible at each time...

Oh, and Demon, booo! to all the dead space in your cannon!


Ok so how can i reduce the dead space without making it too long?
And the ratio, elbow included is 1:1.
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Unread postAuthor: Ragnarok » Tue Oct 21, 2008 3:10 pm

Demon wrote:I am not sure i am going to buy one if it cost too much ,but do someone know about a cheap distance calculator?
I would like to build an super-accurate angle calculator to hit the cible at each time...

Could you elaborate? This isn't very clear to me.

Ok so how can i reduce the dead space without making it too long?

The valve could be up behind the barrel, rather than behind the chamber - this makes the elbows part of the chamber volume instead of dead space.

Alternately, as the flow of a sprinkler is limited anyway, lower bore elbows would reduce the dead space, but without noticeable flow loss (provided their size was above a certain lower bound) - which would probably improve performance.

It's probably not feasible to rebuild your cannon now anyway, but they are things to consider should you build another.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Demon » Tue Oct 21, 2008 3:26 pm

I am not sure i am going to buy one if it cost too much ,but do someone know about a cheap distance calculator?
I would like to build an super-accurate angle calculator to hit the cible at each time...

Could you elaborate? This isn't very clear to me.


Well, i use a the distance calculator, aim with relation of the distance and shoot at the right place...
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Unread postAuthor: Ragnarok » Tue Oct 21, 2008 3:57 pm

Right, I see.

If I get my butt in gear, I'm supposed to be making a distance calculator, but it's not going very fast.
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Does that thing kinda look like a big cat to you?
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