My dad was nearly 80 yrs old at the time and wasn't so much into youtube, however he spent thousands of hours operating high speed air tools which I think is the biggest reason he kicked himself so hard. The thing sounded like a die grinder while it ran and wound up too fast to get off the trigger i...

That's beautiful man. That's the kind of project where if you just have to enjoy the fabrication process itself. The shooting is the icing on the cake Nice work!

I love the last sketch and have a story for you. My dad built a design just about identical to it. The idea was to pick up BBs from the hopper and feed them into the breech one at at a time. The wheel was scalloped rather than paddled but worked just the same. The flow of inlet air was to impinge on...

Look out Taofledermaus

Ah, I might be able to work with something like paint. I've been messing with LibreCAD and not gaining much traction. I reckon blender is out of the question since I struggle with Gimp lol.

I should also mention that I did try a short tube one size smaller (5/16") at the muzzle end of the barrel, a "choke tube" of sorts, in attempt to tighten the spray pattern lol . Unfortunately, even this small restriction rendered it inoperable.

Yes, however back pressure could present some headaches such as all the BB's in the magazine blowing to the rear every time a BB enters the breech, then all sucked forward again as the fired BB clears the muzzle. They would alternate back and forth with a little farther to travel every time one is f...

Ok, my last post wasn't as helpful as it should be. I was excited to see someone went to the trouble to make an animation :D The mechanical operation is animated great. The airflow is correct in showing the diaphragm blowing back and carrying the operating pin out of the way, so everything there is ...

This one is just a fun experiment to answer a question that's been nagging me for over 30 years. Demonstration is at the end.

Yes, that is precisely how it works. You've included both halves of the operating cycle. In reality the diaphragm has travel limited to only enough to get clear so it is a bit asymmetrical regarding travel, but your animation is spot on. Very nice indeed, and thank you . What app do you use for the ...

Now you all may be wondering just how the vacuum is being generated. In the case of the BBV it is exactly the same principle as an air brush. The air blown across the end of the lift tube creates the vacuum needed to draw the paint up out of the jar and into the air stream. So you may think "Why the...

Yes there is a "blow back" half of the cycle which retracts the operating pin. There is also a "suck forward" half of the cycle which punches the next BB into the breech. The diaphragm converts the alternating positive and negative pressure pulses into work. The BB does the switching. Because the la...

I have uploaded the balance of the videos detailing the BBV MG for anyone who is interested in having a go at a build. I'd love to see what can happen with more imagination applied. I am practical to a fault and would love to see the "cool factor" buffed by people better at that kind of thing than m...

Oxygen is a huge liability. Not many people really seems to understand that. I've personally been close to an incident which killed a young man with a wife and 3 little kids at home. The smoke had not yet cleared when I walked through the area wondering what the hell just happened. The root cause wa...

Thank you. And thanks to the moderators for allowing me to post this. I have just published the next video segment going into more detail on the BBV design.