That sounds far too complex, much simpler to have a preloaded cartridge. Indeed it would; but if everyone took the simple route where would the innovation be? ;) remembering too that implementing a liquid-fuel combustion system brings with it its own constraints as regarding pre-loading. I'm not se...

I am sponge, watch me absorb! I really must stop building things using Worldcraft, it makes 2D blueprints impossible... the cartridge system I had in mind is very similar to the one in your pic, with one crucial difference: the rear of the cartridge is completely open. The design I've been working o...

the chamber volume you should aim for should be that at the bottom of the piston stroke if you plan on a non-hybrid atmospheric pressure launcher. so measuring at TDC could prove problematic in this case? ;) I'd already assumed that a gas/petrol-powered Otto-cycle motor is essentially a hybrid with...

I would go for a relatively large scale, in order to facilitate correct fuel injection. In a self-admittedly brilliant flash of insight, I'd figured on using a chamber that equates (to reasonable accuracy) to the volume of the cylinder the injector was originally fitted to... eq were I to filch the...

In spite of the fact that liquid fuelled internal combustion engines are omnipresent, surprisingly little work has been done. The fact that the liquid fuel needs to be physically atomised in order to effectively vapourise and can condense again over time on the chamber walls means that it is not th...

after spending the last couple days getting thoroughly lost in mountains of threads, I thought I'd throw my 2c worth down memory lane, crossed with a question... way back when, I used to make my spudguns a bit different to the endcap/piezo norm... Prehistoric arquebusses were first crafted from stee...