Half a croissant, on a plate, with a sign in front of it saying '50c'
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Graffiti Spray Gun

EVIRD & PU GNAH
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A handgun sized device that can spray a specific pattern of paint with a single pull of the trigger.

The original concept came while watching someone talking on their cellphone, in traffic. Wished I could splat a message on their window saying “HANG UP & DRIVE!” From there the idea of paintball gun that could fire multiple pellets in a pattern. The pellets would be BB sized or smaller; the gun would be a pepperbox design that could fire multiple pellets simultaneously or in sequence. Phrases or patterns could be preprogrammed and quickly selected using buttons or slide lever on the grip or barrel.

Of course, if you’re going to splat a driver’s window, the words would have to be written mirror fashion, like ECNALUBMA.

kdf, Nov 22 2020

Mythbusters paint Mona Lisa using a 'paintball gun' https://imgur.com/r...stingasfuck/c9Ggu2W
[xaviergisz, Nov 22 2020]

Volley gun https://en.wikipedia.org/wiki/Volley_gun
Designed to spoil your whole day. [8th of 7, Nov 22 2020]

Pepperbox https://en.wikipedia.org/wiki/Pepper-box
Simple yet effective; but heavy and bulky. [8th of 7, Nov 22 2020]

Reminds me of Demolition Man https://www.youtube...watch?v=oDrYkwG6Tuo
[scad mientist, Nov 23 2020]

[link]






       It would be really helpful if we just renamed ambulances ecnalubmas.
hippo, Nov 22 2020
  

       No no; you need to choose a word that is both palindromic AND comprised of only letters with horizontal symmetry.
Like "A TOYOTA"; you only have A,H, I, M, O, T, U, V, W, X, Y to work with...
neutrinos_shadow, Nov 22 2020
  

       “...failed to account for obvious difficulties...”
—Voice, Nov 22, 2020
  

       All in good time. And then I’ll post it on completelybaked.com ...
kdf, Nov 22 2020
  

       // obvious difficulties in method //   

       ... but not insuperable.   

       "Volley" guns are Baked and WKTE and have been around for centuries; they have multiple barrels, fired concurrently or consecutively.   

       Using paintballs the size of BB pellets (4.5mm) and a 3D-printed barrel block - with post-manufacture reaming and polishing, using a cold gas as a propellant (150m/s), acceptable accuracy at ranges of up to 5m might be practical. Barrel length would need to be of the order of 20 calibres for that, so the array would be about 100mm long; in a medium density plastic, the mass would be manageable in a handheld device.   

       As velocity would fall off rapidly with range, due to the low mass of the projectiles and the unfavourable frontal area/kinetic energy ratio, ensuring that the pellets shattered on impact yet did not disintegrate in the bore would be a challenge. A High-Low pressure design similar to the U.S. M40G spin-stabilised grenades would be the way to go, but using gas instead of a pyrotechnic propellant.   

       [+]
8th of 7, Nov 22 2020
  

       8th, thank you for ref to “volley gun” - closest terminology I could come up with was its distant relative “pepperbox.”
kdf, Nov 22 2020
  

       Pepperboxes - as any fule kno - are of course a sort of revolver; a precursor to the familiar fixed-barrel rotating-cylinder type. They discharge only a single round for each trigger pull (unless adjacent barrels flash over, a not entirely unknown occurrence).   

       <link>
8th of 7, Nov 22 2020
  

       [scad mientist]; I was thinking the same thing.
neutrinos_shadow, Nov 23 2020
  

       Scad_mientist, thanks for the link! That's quite a bit more elaborate than I was thinking of - but as I know I saw that movie years ago I guess the seed might have been planted then.
kdf, Nov 23 2020
  

       Winston Churchill used to derive a great deal of pleasure from blasting his initials into things with an M1 Thompson submachine gun.   

       His staff were always very nervous when he want to demonstrations of new weapons, as he invariably wanted to have a go himself, and more often than not he got his way, with mixed results.
8th of 7, Nov 23 2020
  

       //As velocity would fall off rapidly with range, due to the low mass of the projectiles//   

       Well UP THE MASS MAN! We'll teach those blighters a lesson they won't bloody well forget!
AusCan531, Nov 24 2020
  
      
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