Dear Mr. Kaye,
I've always wondered why there are no paintguns in existence with a rotary bolt. I think the actual mechanics of a rotary bolt would provide a number of advantages over the standard "horizontal movement" bolts that are currently prevalent. The paintgun could be made smaller as the bolt would remain in one position, and perhaps more importantly I believe cyclic rate could be increased. I base the later presumption on the idea that it requires less energy to rotate a small cylinder, when compared to moving that cyclinder forward, stoping the cylinder, moving it backward, and stoping it again. The mechanics of the operation probabably would not be that difficult. The actual firing process would be a two stage operation: rotation followed by firing. Actuation could be accomplished by a two way valve similar to those found in autocockers. The actual bolt would probably have to be hollow, actually allowing the paintball to rest inside the bolt tube itself. Instead of the current flat face the bolt would be cut at a 45 degree angle, thus allowing paintballs to fall into the bolt when the cut face was up, and sealing into the breech when the cut bolt face was rotated downward. A dual sided detent could be utilized to secure the paintball once inside the bolt. In regards to force fed loaders, the detent would not have to be perticularly agressive as the bolt itself would prevent pressure from the other paintballs in the stack. There might be some difficulty achieving an air tight seal with this design, as the current "horizontal" bolts by thier very nature have more material with which to surround the paintball, however I felt that perhaps a delrin bolt rotating in a synthtic (silicone type material) coated breech might provide an adquate seal. The delrin bolt would provide an added advantage, lowering the bolt weight and subsequently reducing the torque necessary for the rotary stage of operation. The bolt would rotate from the rear along a hollow pin, from which the air would be released into the chamber. The pin itself would be stationary with only the bolt rotating, perhaps using a sealed bearing system similar to those found on skateboards and rollerblades. The bolts rotation could be acomplished by a air driven pistion simlar to the one found on the Tippmann A5. Anyway, I'm obviously not an engineer (Bio major)or exceptional at spelling, but I have noted such rotary bolts in some of the shotguns I use for quail. I always found the action of my Browning (rotary bolt) to be smother and faster than the Benelli (blowback) and wondered why similar concepts couldn't be apllied to paintball.
I've always wondered why there are no paintguns in existence with a rotary bolt. I think the actual mechanics of a rotary bolt would provide a number of advantages over the standard "horizontal movement" bolts that are currently prevalent. The paintgun could be made smaller as the bolt would remain in one position, and perhaps more importantly I believe cyclic rate could be increased. I base the later presumption on the idea that it requires less energy to rotate a small cylinder, when compared to moving that cyclinder forward, stoping the cylinder, moving it backward, and stoping it again. The mechanics of the operation probabably would not be that difficult. The actual firing process would be a two stage operation: rotation followed by firing. Actuation could be accomplished by a two way valve similar to those found in autocockers. The actual bolt would probably have to be hollow, actually allowing the paintball to rest inside the bolt tube itself. Instead of the current flat face the bolt would be cut at a 45 degree angle, thus allowing paintballs to fall into the bolt when the cut face was up, and sealing into the breech when the cut bolt face was rotated downward. A dual sided detent could be utilized to secure the paintball once inside the bolt. In regards to force fed loaders, the detent would not have to be perticularly agressive as the bolt itself would prevent pressure from the other paintballs in the stack. There might be some difficulty achieving an air tight seal with this design, as the current "horizontal" bolts by thier very nature have more material with which to surround the paintball, however I felt that perhaps a delrin bolt rotating in a synthtic (silicone type material) coated breech might provide an adquate seal. The delrin bolt would provide an added advantage, lowering the bolt weight and subsequently reducing the torque necessary for the rotary stage of operation. The bolt would rotate from the rear along a hollow pin, from which the air would be released into the chamber. The pin itself would be stationary with only the bolt rotating, perhaps using a sealed bearing system similar to those found on skateboards and rollerblades. The bolts rotation could be acomplished by a air driven pistion simlar to the one found on the Tippmann A5. Anyway, I'm obviously not an engineer (Bio major)or exceptional at spelling, but I have noted such rotary bolts in some of the shotguns I use for quail. I always found the action of my Browning (rotary bolt) to be smother and faster than the Benelli (blowback) and wondered why similar concepts couldn't be apllied to paintball.
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