This is actually another form of compression ignition, except that the power of the spring or crankshaft is replaced by the pressure of the explosion of the mixture. I think the biggest advantage of my design is that it avoids the premature ignition of propane by the traditional compression ignition...

Let's simulate it. The volume of a is 100cc, the volume of b is also 100cc, and the volume of c is only 10cc. When a explodes, the piston of b moves to the position of c, which is equivalent to compressing it 10 times. The interior of b is originally filled with 1MPa compressed air, which is equival...

This method will challenge the liquefaction limit of propane, exceeding the compression of 20 MPa, and may even reach the energy density of gunpowder. I have been thinking about it for several days and finally believe that this is achievable. Next, I will briefly describe my idea: There are three ch...

Glad to see you're still here

Not far from full automation

Use a check valve instead of a baffle to stop the high pressure flow from the secondary combustion chamber back to the primary, and see what happens to the performance

This is a picture of a 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...

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?

I'm considering semi-automatic supercharged combustion, but I can't replace the bursting disc quickly. Is there any solution?

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?

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...

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...

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 ...