11-16-2019, 09:20 PM | #11 | ||||
Join Date: Aug 2004
Location: Wellington, NZ
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Re: Different Gyroc Designs
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Rupert Boleyn "A pessimist is an optimist with a sense of history." |
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11-16-2019, 09:23 PM | #12 |
Join Date: Aug 2004
Location: Wellington, NZ
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Re: Different Gyroc Designs
You need a barrel to keep the rocket stable and pointed in the right direction until its moving fast enough to be stable on its own. They're also useful for keeping the exhaust out of the firer's eyes.
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Rupert Boleyn "A pessimist is an optimist with a sense of history." |
11-17-2019, 02:25 AM | #13 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: Different Gyroc Designs
Though that isn't terribly far. The SMAW is 17 calibers long, almost half of which is the length of the rocket itself.
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11-17-2019, 06:13 AM | #14 | |
Banned
Join Date: Jul 2006
Location: 100 hurricane swamp
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Re: Different Gyroc Designs
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Loaded length: 1,371 mm Caliber: 83.5 mm Length/Caliber: 16.51807228915663 |
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11-17-2019, 08:28 AM | #15 |
Night Watchman
Join Date: Oct 2010
Location: Cambridge, UK
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Re: Different Gyroc Designs
For artillery, describing barrel length in multiples of the calibre is routine. It gives you an idea of the intended usage of a gun.
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11-17-2019, 09:23 AM | #16 | |
Join Date: Aug 2007
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Re: Different Gyroc Designs
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That initial "stabilizer" is usually more like alunch rails than a barrel and in this case anthony's 17 calibers is going to be too long for a 15mm pistol. That's part of why I suggest just getting rid of the too inaccurate to be useful unguided gyrocs.
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Fred Brackin |
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11-17-2019, 09:27 AM | #17 |
Banned
Join Date: Jul 2006
Location: 100 hurricane swamp
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Re: Different Gyroc Designs
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11-17-2019, 11:56 AM | #18 | ||||
Join Date: Jun 2013
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Re: Different Gyroc Designs
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The more gradual acceleration of a gyroc may allow for payloads that the sharp acceleration of a rifle makes unfeasible, but I don't know if there are any useful payloads that this would allow for. Quote:
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I previously read gyrojets did spin, but then came across some mentions that spinning is bad for rockets, so assumed functional gyrocs wouldn't spin. If spinning does indeed work for rockets, that's a different story.
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GURPS Overhaul |
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11-17-2019, 12:50 PM | #19 |
Join Date: Feb 2016
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Re: Different Gyroc Designs
Spinning is a horrible idea for a rocket, though it is better than nothing. If you do not have a counterspining element, rockets will go in the direction of the spin while they thrust (rifles do not have continuous thrust, so spin is an advantage rather than a disadvantage). It was used in primitive rockets, but it was pretty much abandoned in favor of fins when people started figuring out aerodynamics.
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11-17-2019, 04:22 PM | #20 | |
Join Date: Jul 2018
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Re: Different Gyroc Designs
There have been experiments (Variations on squeezebore I believe) meant to form fin-stabilized projectiles without a sabot:
https://patents.google.com/patent/US3229583 The best source is George Chinn's Machine Guns volume 5 which you can find on Internet Archive: https://archive.org/details/TheMachi...MChinn/page/n3 From page 564 onwards Quote:
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