Bdiac wrote:I did a system using a 3ltr dive cylinder with a hand operated 'blow' valve to operate the bolt on an AR before, pain in the arse to carry, but for range use, was good fun, until certain members of the club took a dislike to it and banned me from using it.
your in the wrong club ! come and join mine, you will be nurtured and encouraged not to mention surrounded by similar eccentrics!!!
Yes Russ. I know about how eccentric you are. You like remingtons and s*** scopes for a start
Bdiac wrote:I did a system using a 3ltr dive cylinder with a hand operated 'blow' valve to operate the bolt on an AR before, pain in the arse to carry, but for range use, was good fun, until certain members of the club took a dislike to it and banned me from using it.
your in the wrong club ! come and join mine, you will be nurtured and encouraged not to mention surrounded by similar eccentrics!!!
Yes Russ. I know about how eccentric you are. You like remingtons and s*** scopes for a start
Why not use the gas as per a normal AR except, instead of it flowing thru the gas tube to hit the bolt carrier key (a la Section 5)- it flows to the gas tube into a pressure cylinder - whereupon it stays until the user presses a button attached to a valve on said cylinder.
The cylinder would be filled every shot with the gas required to cycle the action (plus carbon too which may well bung the valve up - problem to be solved?), but wouldn't be released without human intervention to operate the valve and cycle the action.
There'd be no consumables, it'd be self contained - and the cylinder could be fairly small I would have thought such that it'd fit under the handguards - probably not under a free float forend unless you could make it a fairly small donut shape?? Perhaps you could disguise it as a torch mounted to the side of a free float - or maybe incorporate it into a vertical grip on a forend?
The first RFD that wants to use my idea can do so for free-ish - as long as they build me the first one!! In 308, 223 and 300AAC and 6.5 :-)
Under barrel air cylinder (like on an air rifle pcp) hooked up to a sprung piston mounted on the side picatinny rail activated by a push button release valve and separate charge reservoir. The charge reservoir would need a valve to fill it when the button is pressed for your next shot. You would need a hook up at the end of the cylinder to recharge it from a tank.
You could even make it look like an m203
Well a bit like it anyway!
Nothing to do with the gun. Requires an activation step (button) so should be section one until it's banned!
I reckon you could have a solanoid unlock the bolt from an electrical switch like the lever release does if the gas or a piston activated by the gas is used to lock the bolt back
Be good to see the sgc patent if he has one and see what he claims
Still don't know how they can allow that but hey happy days
tackb wrote:a linear actuator would be too slow although it would have the required torque , a large solenoid (think stop type solenoid as fitted to large old diesel engines) could work but would be heavy especially when you take the battery into account ?
could maybe be done with a window wiper motor style arrangement but you would be unlikely to get it inside the forend?
what about an air cylinder charged by a small battery powered on board compressor?
I was thinking along the lines of a stop solenoid.I used to work at Perkins Engines in Shrewsbury and the Eagle series used an electronic stop solenoid which could operate quite quickly if you rapidly flicked the switch on the tester.They were a bit bulky but powerful and I would say a much smaller one would have sufficient oomph to cycle an AR.The ones we fitted were 24v but I would imagine a 9v PP3 powered version would do the job.
"The only real power comes out of a long rifle." - Joseph Stalin
Give a man a gun and he can rob a bank.....give a man a bank and he can rob the world!.
tackb wrote:a linear actuator would be too slow although it would have the required torque , a large solenoid (think stop type solenoid as fitted to large old diesel engines) could work but would be heavy especially when you take the battery into account ?
could maybe be done with a window wiper motor style arrangement but you would be unlikely to get it inside the forend?
what about an air cylinder charged by a small battery powered on board compressor?
I was thinking along the lines of a stop solenoid.I used to work at Perkins Engines in Shrewsbury and the Eagle series used an electronic stop solenoid which could operate quite quickly if you rapidly flicked the switch on the tester.They were a bit bulky but powerful and I would say a much smaller one would have sufficient oomph to cycle an AR.The ones we fitted were 24v but I would imagine a 9v PP3 powered version would do the job.
The problem with solenoids is their short stroke. Just looked up a few datasheets and stop solenoids only seem readily available in strokes up to 38mm and the power requirements are huge. How about a stepper motor with a rack and pinion as an alternative?
