26 Responses

2. how did you make your computation regarding the pressure produced

3. well i see your idea about the steel inside lead (: smart actually.. for
   form you could use either CaSO4 (gypsum) or clay.. or just aluminium foil
   (lead is half the melting point of aluminium) but if you decide, perhaps a
   tiny bang would put penetration to its max? like just a tiny bit of AM
   infront of the steel? (for this you would need the steel to be able to
   slide down into the lead, cold and then glue on the back perhaps)

4. i like how you think (: ETN, excellent choice, but perhaps a tiny tiny bit
   of tatp should be added like a tiny crystal (remember that you dont want
   large crystals of that stuff… x_x but yes, i remember shooting a pellet
   from my .. pellet gun, at a aluminium soda can, the pellet pushed the can,
   but at same instant, the explosion BLEW a shrapnel of the cans bottom (:
   looked so neat.. you need absolutely nothing of HE to help its
   effectiveness, also the lead will spread and fragment (;

5. btw you could drill a small hole in the back of your steel or just have
   like.. a canister of steel, and the tip of steel, and just melt abit of
   lead into? im quite sure that they use for real ammo (5.56 etc) they make a
   copper shell and then fill it with varying metals including primarily lead,
   to give weight and strenght (:

6. well that was actually what i wanted to write as well, but i was in a kind
   of rush (: but a magnet.. yes.. yes.. but it should be quite weak, perhaps
   in the chamber where the bullet gets loaded, so its drawed backwards, and
   just kept there? but i guess paper would be the best solution as it likely
   would get blown out with all of the other (: but DAMN i want one of those
   :D perhaps you could add a larger bolt for .. the.. bolt? :P

7. @mcwario13 Yes it is made in a simple electrolysis cell powered by a car
   battery charger.

8. You could try electrolysis on a small scale in this gun using a car battery
   or something for your fuel..?

9. @pyrosimple Just what you see in the video. The steel can is the biggest
   achievement because this is the first of these prototypes to penetrate
   that. With a longer barrel and a better bullet it could be much more
   powerfull. On the next version I will use a pressurized combustion chamber
   so it can store several times the energy in a combustion chamber about the
   same size.

10. dornier, you surprise me every damn time tho ive never underestimated you
    (: that formula i have to save ^^

11. @JaycubL what is the maximum damage you have done with it?

12. niiiiice

13. Yes I know of him. Have you seen his new channel HomeMadeShow?

14. When I finish it, i’ll try to post some update videos. :D

15. I dont know if you noticed but in the photo of the muzzle flash you can see
    little shock crystals AWESOME

16. wait a sec you were on his comments?? :D yea he PM’ed me about it..

17. That’s a cool idea. Are you going to try it? That would be a very heavy
    weapon but most of the weight would be the backpack… It would have a vey
    high ammo capacity. I cam to the conclusion that for anything other than a
    very simple hunting rifle, these are to bulky to be a hand held weapon.
    Fuel-air guns could be useful for vehicle mounted weapons and cannons. They
    can accelerate the projectile to a higher max speed than conventional guns.
    And they require less ammo producing infrastructure.

18. think of this…. look at a gas blow back pellet gun…. uses compressed
    air to force a pellet out the barrel…. what if you used refillable 12g
    air tanks in the clip along with a battery supply and ammo all in the same
    clip “mag”… you would have your propellent,ignition,projectile all in a
    refillable small package, could function as a conventional fire arm…. but
    the technacality is that you can controle the valocity and keep it as a
    non-firearm…

19. Version 6 (not completed yet) has a gas piston system. I experimented with
    the possibility of a gas piston system with gas gun version 4. I don’t
    think blowback can work with this type of gun because there is no brass
    casing to seal the chamber, the mechanism needs to keep the chamber closed
    until the bullet is gone. A gas piston system can work though.

20. reminds me of this guy /apdapd2 hes got some serious home defence spud gun,
    very simply built aswell! take a look at his video where he tests 4
    different things..

21. Yes, I have though about the concept of a oxyhydrogen rifle for hunting
    that is like that with solar cells and a battery. You would be able to make
    the ammo yourself very easily because all you need is the bullet and some
    water, no casings etc. The gun might be heavy though. On my website (see
    video description) look at the “fuel air guns” page in the weapons section
    to see a design for a carbureted gasoline/air pump action rifle that might
    be more practical (scroll to bottom of that page).

22. Ya. I’ve never tried making complex ammo like that but it would probably be
    a good idea. I came up with an idea a while ago for a layered bullet that
    is a hardened steel rod in the center, wrapped in a layer of lead for the
    main body of the bullet, and a thin tube of steel over that with spiral
    grooves cut in it. The idea is that the steel rod can pierce armored
    targets, and the thin tube would tear along the grooves spread out like a
    flower as it passes through soft targets.

23. what do you think is the speed of the bullet?

24. Yes the bullets I am using are already pretty light because they are steel
    instead of lead. In experiments with “fuel air gun version 3” I found that
    a heavier projectile could rip through a pop can while a lighter projectile
    would bounce off. A heavier projectile will recieve more impulse (force x
    time) because it will be in the barrel longer. To get the most out of a
    lighter projectile you need an even longer barrel. Sectional density is
    also important, it’s a big factor in penetrating power.

25. Thanks thats a good idea. The paper could probably also act as a gasket and
    help ensure that the pressure doesn’t escape where the combustion chamber
    and barrel meet. I also have thought about putting a strong magnet outside
    the barrel where the bullet is suppose to stay. The problem with that is
    that it only works on steel bullets, and it would slow the bullet a little.

26. Exploding bullets! That’s awesome! It would have to be something that’s
    fairly stable but still sensitive enough to go off at impact. And it should
    be cheap and powerfull. Maybe ETN? One time I shot a small paper tube full
    of TATP out of the fourth gas gun. I was afraid it would explode in the
    barrel but it didn’t. It was very loud when it hit a tree.