Gamification of social interaction, it fucking sucks. To be honest a little way of showing appreciation for a post without necessarily replying isn't such a bad thing in my estimation, the issue comes when posts are ranked according to likes/dislikes and there is an algorithm that sorts them accord...

Returning from the dead to post once again. As much as I too lament the decline of the hobby forum and shift to social media, in retrospect it was probably inevitable. Hobby forums were typically operated with little interest in profit, and a large degree of interest in maintaining a community, arch...

Here is my full auto qev pop off bb gun, it's shooting around 450 fps with 0.30g bbs and about 300 fps with steel 0.90g bbs. It is powered with a paintball bottle with a modfied preset to around 200 psi

" It is a very personal opinion, which has no intention of being generally true."

hectmarr wrote: ↑

Thu Oct 20, 2022 7:04 pm

the tests at 20 meters, out of 4 shots, were only in 1 cans...

I hope the backstop was secure

the web is certainly in a dark place right now with perhaps darker times ahead. It's true, and it doesn't seem like it's going to get any better, your points about gaming neurochemistry are very accurate and it does not seem reversible. I suppose it's typical to bemoan the younger generations, but ...

Besides, my opinion is that the coefficient of friction should increase a lot, because the water deposited in the bore of the barrel That's a good point too, any water in the barrel ahead of the projectile is mass that has to be accelerated and would decrease performance. Perhaps a tank cannon styl...

perhaps going down the path of COOPERATION and not COMPETITION is more profitable. A simple project or a series of projects and not so much is the way to encourage participation. I mean, do it together. A chimera? perhaps, but surely it is trying to give it shape and viability. :) We did a bit of b...

I like that idea, Hector.

There's a few people on here with machine tools (I'm one), maybe some community machining of specific parts? Maybe a design for a specific high performance hammer valve, something like that?

hectmarr wrote: ↑

Mon Nov 07, 2022 4:45 pm

Why can't a compressed air-propane mixture burn at more than 28X? I didn't know this, and I don't understand why...

It will burn at much higher mixes but if you are fueling with the propane at atmospheric pressure, then 28x is the highest mix you can achieve.

Hello, everyone, I am from China, and I don't speak English, so the following content comes from Machine Flip: In my country, gun control is very strict, but there seems to be no clear definition of incendiary gun, so I decided to make it. I've been in the forum for a long time, and this is my first...

Finally found some time to think about this and I'm happier with this design: https://i.imgur.com/lTrSFY0.jpg Started to work on it this morning and the lathe motor decided to misbehave... https://www.youtube.com/watch?v=SQBKHBAlLGM Looks like a capacitor/centrifugal switch issue, to be investigated...

If in a closed chamber I manage to introduce propane and compressed air within the range of stoichiometric proportions, at 100 bar, with a proper ignition, will it explode? :? With the right ignition it should, and we have proof :) I don't know if you're aware of this example that was shooting at u...

I don't know if anyone has made a specific side by side comparison, but while the ratio of oxygen to propane is the same in both cases, there are important differences. Working with pure oxygen is a lot more dangerous so it is less practical, and there is a danger of DDT especially at higher mixes. ...

Firearms generate tens of thousands of psi of chamber pressure, so if you keep the same caliber and projectile weight, achieving similar power is impractical with a hybrid. https://i.imgur.com/32QQPsG.jpg Using a 50x mix and a 30 inch barrel with approximately 2:1 chamber:barrel volume ratio, I got ...