Search found 134 matches

by Doctore
Wed Feb 26, 2020 10:50 am
Forum: Off-Topic Hobbies
Topic: Concrete ballistic shield
Replies: 2
Views: 1040

Re: Concrete ballistic shield

That's interesting! Reminds me of the Panzernest: Given the mobile nature of modern warfare, I don't think fixed positions have much value. The average infantryman has access to a plethora of weapons with shaped-charge warheads that can deal with meters of concrete. There's enough footage of ATGMs ...
by Doctore
Tue Feb 25, 2020 8:13 am
Forum: Off-Topic Hobbies
Topic: Concrete ballistic shield
Replies: 2
Views: 1040

Concrete ballistic shield

Hello everyone! This is a shield I made a month ago, which I plan to test with my homemade airgun. It was cast in a TV parabolic antenna, two layers of rebar were used. Sand was washed several times to remove dirt and clay. As you will see, the outside section is the weakest. https://youtu.be/m7TGtb...
by Doctore
Fri Jan 17, 2020 3:16 pm
Forum: Combustion Cannons
Topic: Spud gun powered by cooking oil?
Replies: 11
Views: 2844

Re: Spud gun powered by cooking oil?

Has anyone been experimenting with this concept any further? Hello PCGUY :) :) I have not experimented with this concept yet, as I do not have the proper tools and resources. In my mind, I went through this idea many times. There are many brilliant individuals here on Spudfiles and if someone decid...
by Doctore
Thu Nov 28, 2019 9:39 pm
Forum: Ammo & Parts
Topic: Recover steel bearing balls/spheres
Replies: 1
Views: 942

Recover steel bearing balls/spheres

I don't know about you, but for me steel spheres are very valuable as ammo. I can never find enough of these from old ball bearings, and once fired outdoors, there is a low chance of recovery. I am aware than these projectiles cause drag, and from what I observed there is probably a loss of 5-10% of...
by Doctore
Tue Nov 19, 2019 2:23 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: 6mm BB gun conversion kit
Replies: 0
Views: 2998

6mm BB gun conversion kit

Hello everyone! This is my 6mm BB gun that is composed of a blow gun, bike pump adapter and a barrel made out of 2 pen tubes. The footage was recorded during the summer, but I totally forgot to upload this project. I built it in this way to save parts and to easily convert my regular ball valve airg...
by Doctore
Sun Nov 17, 2019 11:12 am
Forum: Combustion Cannons
Topic: Spud gun powered by cooking oil?
Replies: 11
Views: 2844

Re: Spud gun powered by cooking oil?

Hello! :) At first glance the system seems quite complex in general. In my opinion, shaping the mix is going to be quite difficult and inaccurate, as I say, at the first sight of its publication. The issue of ignition is unnecessarily complex, having a small piezoelectric lighter that instantly spa...
by Doctore
Sat Nov 16, 2019 1:31 pm
Forum: Combustion Cannons
Topic: Spud gun powered by cooking oil?
Replies: 11
Views: 2844

Spud gun powered by cooking oil?

Hello everyone! I would like to share with you this rather crazy combustion cannon design. I am fairly convinced that it could work, but there is always a chance that the design might be flawed. As always, I am looking forward to your opinions and ideas. To better understand how this cannon is suppo...
by Doctore
Fri May 24, 2019 5:51 pm
Forum: Combustion Cannons
Topic: Automatic Combustion Chamber Idea?
Replies: 12
Views: 2431

Re: Automatic Combustion Chamber Idea?

It can be a simple option, introduce the pulverized fuel and mix it with the air in your explosion chamber. T How would you vaporize alcohol, like a quick injection? Sounds great to be honest. Anyways, do you think it would be safe to fill the majority of the tank with alcohol and use less volume o...
by Doctore
Wed May 22, 2019 4:05 pm
Forum: Combustion Cannons
Topic: Automatic Combustion Chamber Idea?
Replies: 12
Views: 2431

Re: Automatic Combustion Chamber Idea?

So my suspicions are confirmed, definitely not a safe design. Perhaps the only possible way would be to fill the majority of the reservoir with alcohol and use as little pressurized air as possible. And even the military don't keep the fuel and oxidiser together in their *designed for purpose* fuel-...
by Doctore
Tue May 21, 2019 9:18 pm
Forum: Combustion Cannons
Topic: Automatic Combustion Chamber Idea?
Replies: 12
Views: 2431

Automatic Combustion Chamber Idea?

Hello! Again, one of those hypothetical scenarios, it might sound silly but here is the idea. The device would be composed of two chambers connected with a hammer valve. The first chamber is the reservoir in which pure Alcohol (Ethanol) and pressurized air would be stored. The idea is also to heat t...
by Doctore
Tue May 21, 2019 6:43 pm
Forum: Pneumatic Cannons
Topic: Possible way to increase pneumatic cannon power?
Replies: 6
Views: 886

Re: Possible way to increase pneumatic cannon power?

Yes, heating it up would increase the theoretical performance of the gun. However, ball valves absolutely suck and the use of one would cripple you as compared to a normal pneumatic with a proper valve for the application. Beyond that? It's a lot more energy efficient to just put the gas from the s...
by Doctore
Mon May 20, 2019 9:36 pm
Forum: Pneumatic Cannons
Topic: Possible way to increase pneumatic cannon power?
Replies: 6
Views: 886

Possible way to increase pneumatic cannon power?

Hello everyone! Recently I was thinking about this idea to increase your pneumatic cannon power if you are limited by pump source. I have no idea if this could work. I have an ordinary bike pump which can go up to 6 bar and currently don't have an electrical air compressor. The idea is to create ful...
by Doctore
Mon May 20, 2019 6:54 pm
Forum: Off-Topic Hobbies
Topic: Nazi Sonic Cannon
Replies: 11
Views: 2177

Re: Nazi Sonic Cannon

Anyone knows if Sonic weapons are used in warfare or they are banned like blinding lasers? https://en.wikipedia.org/wiki/Long_Range_Acoustic_Device Yeah, I know about this thing. Looks like something from George Orwells 1984. [youtube]https://youtu.be/QSMyY3_dmrM[/youtube] Wonder what the other cou...
by Doctore
Sun May 19, 2019 6:04 pm
Forum: Off-Topic Hobbies
Topic: Nazi Sonic Cannon
Replies: 11
Views: 2177

Re: Nazi Sonic Cannon

I was researching a bit today and found two interesting sonic weapon patents. https://patents.google.com/patent/US4349898A/en https://patents.google.com/patent/US5973999A/en First one can be used as a long range communication device and as a weapon. It is complicated, especially when it comes to sou...
by Doctore
Sat May 18, 2019 4:56 pm
Forum: Off-Topic Hobbies
Topic: Nazi Sonic Cannon
Replies: 11
Views: 2177

Re: Nazi Sonic Cannon

Thank you guys for all the valuable info. It seems like there are lot of ways to design Sonic weapons, and by tunning frequency, wave length and amplitude different organs or parts of central nervous system are affected. Anyone knows if Sonic weapons are used in warfare or they are banned like blind...