Search found 15 matches

by Vadim
Wed Aug 28, 2019 9:31 am
Forum: Pneumatic Cannons
Topic: 150 bar 15mm caliber piston valve beast
Replies: 3
Views: 1599

150 bar 15mm caliber piston valve beast

Hi I've made a very powerful pneumatic gun based on a piston valve. It looks ugly but it's a prototype yet, because i don't have enough money and needed tools now to finish it. But it still shoots. Tested with paintballs and 15mm steel balls(barrels are exchangeable). I've been able to launch the pa...
by Vadim
Tue May 14, 2019 9:17 am
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun

Finally, here it is: [youtube]https://youtu.be/pKgZIxwvpSA[/youtube] Sorry, not as much as i wanted to do. I prepared different targets and wanted to do at least 5 shots, but neighbour complained and promised to call police if i won't stop shooting. Maybe i will make a part 2 later on. For this purp...
by Vadim
Tue May 07, 2019 8:43 am
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun

It is finished now!
Video will be soon.
by Vadim
Thu May 02, 2019 12:13 pm
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun

Well done! Looks like a good, strong hybrid cannon. I see your spark plug sits outside the main chamber area and it still works good. That's good to see. I was wondering if it had to be way inside the chamber area but I guess its fine sitting outside. That's a relief for me regarding my own future ...
by Vadim
Wed May 01, 2019 1:02 pm
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun

Thank you! I am cutting burst disks out of aluminum beer cans and milk cartons. I use 3 layers at 5x mix. Also tested with 3 layers at 6x today. Damage is imressive. 90 gram wax slug with 16mm marbles busted 50mm wooden board at 6x. Also got a chrony result with saboted 30mm steel ball – 190m/s. Bal...
by Vadim
Wed May 01, 2019 5:09 am
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun

Thank you! Well, i will probably stick with my powerful ignitor, at least in this gun. Maybe it isn't necesery, but it gives me more confidence. Also i've never seen such piezo like on your picture. If i decide to use it, i probably need to order it from China. Shipping will take a lot of time and i...
by Vadim
Tue Apr 30, 2019 5:03 pm
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

Re: My first hybrid gun.

Here is a better picture of the gun and pictures of the ignition setup. Now the union has a piece of thread welded on for the barrel attachment, but this picture was made before.
by Vadim
Tue Apr 30, 2019 4:37 pm
Forum: Hybrid Cannons
Topic: My first hybrid gun
Replies: 14
Views: 3443

My first hybrid gun

After two monthes i finaly made my first hybrid gun. It took so long because of the lack of money and knowledge. It's not fully finished yet but it already shoots. Specs: Chamber – 44cm of 2" steel pipe with welded in threaded fitting for a sparkplug. Walls are 3mm thick. Barrels – 100cm 50mm barrel...
by Vadim
Fri Feb 22, 2019 4:42 pm
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

Well, you probably right. Thank you for advice!
by Vadim
Fri Feb 22, 2019 4:08 pm
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

Chamber is steel with about 2.5mm wall thickness. Earlier on i made an air rifle with 1/2" diameter and 18" long steel chamber(approximately the same wall thickness) that i've been pumping up to over 200 bar and it holds absolutely fine. In case with my hybrid, HGDT predicts maximum pressure of 100 ...
by Vadim
Thu Feb 21, 2019 12:08 pm
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

Here is the chamber that i want to use. 19.2 inches long, 2" diameter, 60.3 in³ volume. I think it's gonna be a mighty cannon. HGDT expects 722 ft/s with 3.9 oz 1.25" projectile(steel ball) at 7x mix.
by Vadim
Thu Feb 21, 2019 9:29 am
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

And won't it be better if i will use an oxygen instead of air?
by Vadim
Thu Feb 21, 2019 9:15 am
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

I already downloaded it) One more question i have. I just found out that there is no clear propane in Russia, it is all mix of propane(60%) and butane(40%). Maybe it is every where like that, i don't know. Anyway, the question is: will the proportions for propane that i read in hybrid fueling thread...
by Vadim
Wed Feb 20, 2019 11:08 am
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Re: Want to build my first hybrid

Thank you for answer!
by Vadim
Tue Feb 19, 2019 4:32 pm
Forum: Hybrid Cannons
Topic: Want to build my first hybrid
Replies: 12
Views: 2352

Want to build my first hybrid

Hi! I am new here and i want to build my first hybrid cannon. I have a question about mixes. I want to use propane as a fuel but i don't know the ratio of it to air. For example if i want 10x atmospheric mix how much air and propane i have to add? Also i want to know why nobody (at least i did not s...