Search found 52 matches

by yyt
Fri Feb 09, 2024 1:16 am
Forum: Hybrid Cannons
Topic: Successfully penetrated 10mm steel plate!
Replies: 4
Views: 479

Re: Successfully penetrated 10mm steel plate!

This is a picture of a steel plate.
by yyt
Fri Feb 09, 2024 1:12 am
Forum: Hybrid Cannons
Topic: Successfully penetrated 10mm steel plate!
Replies: 4
Views: 479

Successfully penetrated 10mm steel plate!

Combustion chamber volume: 100cc Barrel diameter: 15mm Barrel length: 100cm Fuel: Liquefied petroleum gas Combustion aid: air with 40% oxygen content Multiple:70× Projectile: 15mm steel ball Bursting disc: 3 circular iron sheets with a thickness of 0.3mm How much energy do you think this blow contai...
by yyt
Tue Feb 06, 2024 8:53 pm
Forum: Hybrid Cannons
Topic: Will it still work when the fuel starts to liquefy?
Replies: 0
Views: 451

Will it still work when the fuel starts to liquefy?

I couldn't get propane and had to use butane instead, but butane seems to have a much lower liquefaction pressure than propane, when I add pressure it will be liquefied, can butane still be ignited at this point?
by yyt
Tue Jul 04, 2023 9:05 am
Forum: Hybrid Cannons
Topic: How to replace bursting discs
Replies: 1
Views: 2112

How to replace bursting discs

I'm considering semi-automatic supercharged combustion, but I can't replace the bursting disc quickly. Is there any solution?
by yyt
Fri Feb 03, 2023 8:05 pm
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 11
Views: 6606

Re: Failure to break through 10mm steel plate

Stabilizing Finn wrote:
Wed Feb 01, 2023 11:03 am
This is just a guess but I would say roughly 1100J of energy at muzzle. Few years ago I experimented quite a bit with high mix hybrids and figured out some formulas that can be used to estimate muzzle energy.
What is the formula? Can they exceed the accuracy of hgdt?
by yyt
Fri Feb 03, 2023 8:01 pm
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 11
Views: 6606

Re: Failure to break through 10mm steel plate

picture thread for reference , that is extremely impressive, congratulations! Can it be compared with the 7.62×39mm intermediate rifle bullet? I know that the bullet fired by ak47 can pierce a 10mm steel plate, but the cross-sectional area of the bullet is different, which will affect the penetrati...
by yyt
Fri Feb 03, 2023 7:58 pm
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 11
Views: 6606

Re: Failure to break through 10mm steel plate

About the only way you're really going to get an idea of muzzle energy is to run it through a chronograph, or if you don't have access to one, shoot into a ballistic pendulum. The latter is very easy to set up; with a mobile phone as camera ad some calculations you can get some very accurate result...
by yyt
Thu Feb 02, 2023 3:34 am
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 11
Views: 6606

Re: Failure to break through 10mm steel plate

Mixing number: 150 Projectile diameter: 12mm Projectile mass: 7g Tube length: 100cm Combustion chamber volume: 20cc Target: 10mm a3 steel plate. This is a picture of a 12mm steel ball impacting a 10mm steel plate. The bullet is embedded in the steel plate and cannot be removed. There is a bulge on ...
by yyt
Tue Jan 31, 2023 1:06 am
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 0
Views: 35149

Failure to break through 10mm steel plate

Mixing number: 150 Projectile diameter: 12mm Projectile mass: 7g Tube length: 100cm Combustion chamber volume: 20cc Target: 10mm a3 steel plate. This is a picture of a 12mm steel ball impacting a 10mm steel plate. The bullet is embedded in the steel plate and cannot be removed. There is a bulge on t...
by yyt
Tue Jan 31, 2023 1:04 am
Forum: Hybrid Cannons
Topic: Failure to break through 10mm steel plate
Replies: 11
Views: 6606

Failure to break through 10mm steel plate

Mixing number: 150 Projectile diameter: 12mm Projectile mass: 7g Tube length: 100cm Combustion chamber volume: 20cc Target: 10mm a3 steel plate. This is a picture of a 12mm steel ball impacting a 10mm steel plate. The bullet is embedded in the steel plate and cannot be removed. There is a bulge on t...
by yyt
Tue Jan 31, 2023 12:42 am
Forum: Hybrid Cannons
Topic: The needle valve actually failed at 150×
Replies: 5
Views: 3127

Re: The needle valve actually failed at 150×

jackssmirkingrevenge wrote:
Sat Jan 21, 2023 4:53 pm
the maximum working pressure of my needle valve reaches 400mpa
Ah, but what's the maximum working temperature?
I don't know its maximum working temperature, but it is a metal hard seal, so I think the temperature should have little effect, which may be a product quality problem.
by yyt
Sat Jan 21, 2023 10:56 am
Forum: Hybrid Cannons
Topic: The needle valve actually failed at 150×
Replies: 5
Views: 3127

Re: The needle valve actually failed at 150×

这是它的照片。在几次150次射击后,它变得无法保持密封。
by yyt
Sat Jan 21, 2023 10:46 am
Forum: Hybrid Cannons
Topic: The needle valve actually failed at 150×
Replies: 5
Views: 3127

The needle valve actually failed at 150×

I can't understand that the initial pressure of 150× and the theoretical explosion limit pressure should be less than 110mpa, but the maximum working pressure of my needle valve reaches 400mpa. Why did it fail?
by yyt
Thu Jan 12, 2023 6:49 pm
Forum: Hybrid Cannons
Topic: Help for spark plug leakage problem
Replies: 6
Views: 3923

Re: Help for spark plug leakage problem

Do you think a self-made epoxy spark plug can work better? I would make something like that: Untitled.jpg Using this sort of fitting: Untitled.jpg Yellow is a plastic cup or similar insulator, glue to the fitting, stick your electrode through then pour marine epoxy. Thank you for your advice. It lo...