SpudFiles

JSR, could it be an option to apply an abrasive polishing paste between the rough parts and work them back and forth, allowing them to polish themselves in a natural way? Just a thought. It crossed my mind too but it seems targeting the relevant area is the preferred way to go about it. I'm sick wi...

First thing to try would be to remove the handwheel parts entirely, reassemble the rest of the slide, adjust the gibs to "close enough but a bit slack" and see if you can slide it smoothly by hand. If it still sticks, your slideways need some serious looking at, if not yo can start looking at the l...

At last, it's alive! https://i.imgur.com/SmWzrj1.gifv Did some running in on the lathe, everything seems to be working nicely :D The only thing I'm not happy about is the compound slide. Even with the gib screws loosened it seems to "stick" at some points, the handwheel movement isn't smooth at all....

Yes, to a point: https://youtu.be/F9Tpn8rd1Tk It just need a lot of force to operate even with relatively low pressures. You would definitely need some form of strong hammer to set it off. Since I was looking at blowback mechanisms, I did not proceed with it as too much hammer strength would make bl...

Xamllew wrote: ↑

Tue Mar 03, 2020 4:33 pm

I had a similar idea for a valveless, except using a mechanism like a Quick Disconnect air hose fitting to lock the projectile in place.

Something like that:

This should almost act like a burst disk in that with such high friction the projectile would require a certain threshold of pressure to get it moving, such as with combustion cannons, where the projectile essentially is the valve. Pretty much, as long as the projectile is properly airtight. Effect...

Very cool find!

Here is a video explaining how he made it:

hectmarr wrote: ↑

Wed Feb 26, 2020 4:44 pm

Here a video of the operation.

Wow, the muzzle velocity is much lower than I expected



Looks great, very inspring! An electro-pneumatic repeater will definitely be on the cards once I get my workshop sorted.

I'm afraid I can't help with the translation but here is arguably the best ETG ever posted on this forum: viewtopic.php?p=162698#p162698

Some good ol' back to basics produce acceleration, love it!

Great idea! This way you are not limited to spherical projectiles... I had tried to make something similar a long time ago where a solenoid pushes a bolt forward simultaneously chambering the projectile while opening a balanced valve but sadly both my materials availability and electronics knowledge...

Looks like your traditional three-way valve /QEV setup: https://i.imgur.com/JW8LrsI.gif When at rest, the QEV pilot is connected to the main air chamber (filled from a CO2 bottle and presumably going through a regulator to bring the pressure down). When the three-way valve is actuated, the main cham...

That's interesting! Reminds me of the Panzernest: https://i.imgur.com/4piS6Yd.jpg Do you think these concrete spheres could be useful in modern warfare. Perhaps placing them in a densely wooded area to conceal them from air observation. Given the mobile nature of modern warfare, I don't think fixed ...

Xamllew wrote: ↑

Mon Feb 24, 2020 7:31 pm

The original post was probably made when you were a child.

To answer the original question: viewtopic.php?p=82708#p82708

A little over a month ago I posted about getting some new tooling in my new abode. I will be chronicling developments in this thread. Not much progress to report so far, between work and settling in to the joys of home ownership I haven't had a lot of spare time, but there has been a steady trickle ...