This is now starting to sound like a Drozd Blackbird, great fun at 1200 rpm from 600 shot magazine
Quote from: rkr on March 27, 2019, 08:23:40 AMThis is now starting to sound like a Drozd Blackbird, great fun at 1200 rpm from 600 shot magazine 1200 rpm would be a stretch but paintball markers can easily feed 480 rpm from a well designed gravity-fed hopper:Sticking with 3/8" bearings at say 475 feet per second, that's 27 ft lbs per shot at the muzzle, giving you 216 ft lbs from a one second burst... that's starting to go beyond a backyard plinker One for when I have better places to shoot...Incidentally, maybe such a high rate of fire is not really that much of a stretch - in the last video of the subject of this thread, the rate of fire calculated from the slow motion footage is around 40 rounds per second, an astonishing 2400 rpm which is double that of the Drozd
Thanks!Quote from: Rob M on March 23, 2019, 09:23:28 PMOn a larger bore, in principle , the semi or full auto action would be easier to achieve due to the surface area of the bolt itself. ( aside from a transfer port blowoff assisting the hammer ).Indeed, you'd also need a larger valve seat for a larger bore, though being balanced the hammer force increase needed would be exponentially lower than the force available to recock the bolt. Quotea .375 slingshot steel ammo version would be pretty scary..In full auto it would be a little pricey to run in terms of air and ammunition, but I would like to make something like that a semi-auto plinker.I have an idea for a "probeless" design, where the air cocks a smaller diameter hammer directly and during firing, the barrel is sealed by the next round in the magazine that is held in place against the pressure by a pawl:Naturally it would only work for hard spherical ammunition.
On a larger bore, in principle , the semi or full auto action would be easier to achieve due to the surface area of the bolt itself. ( aside from a transfer port blowoff assisting the hammer ).
a .375 slingshot steel ammo version would be pretty scary..
How does that work? The air/co2 pressure most be much higher then the spring pressure right? Feel like it would compress the mag spring and leak out gas from the mag well??
I have a Baikal Makarov that use the same valve.
Not sure if the valve on the t4e .43 is good enough to shoot steelballs tho, I was planning to use hpa at around 1200psi and a longer 11mm barrel, not sure how well the mags would seal up as they look pretty leaky.
I think it would be hard to get a pipe/barrel for normal steel bbs, what did you use for barrel on the steel bb version of this build, is it 4.5mm id or 4.4mm?