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Post by captinjoehenry on Oct 11, 2016 20:48:08 GMT
Fair enough. I don't honestly know enough to say one way or the other but in general if you want to fire faster for longer you usually want a thicker barrel. Again this is not something I am hugely knowledgeable about and I'm just going off of the fact that high fire rate cannons use thicker barrels.
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foof
New Member
Posts: 31
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Post by foof on Oct 12, 2016 13:17:11 GMT
I designed this a few days ago, originally patterned after the 20mm Oerlikon cannon [...] Mhh Oerlikon that name rings a bell. SourceBe carefull with that gun
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Post by concretedonkey on Oct 12, 2016 16:53:00 GMT
Not sure if it fits the formula for a good design really but I'm fond of it , its so tiny and adorable. Used if first on a drone that was around 50,60 kilos , deployed in groups of 5 by another drone.. the tactic was effective but it was killing my framerate so I haven't made any of them lately. After that I started sticking it as a secondary weapon on every drone I make. With that weight and energy consumption there is really no reason not to do it. And another gun is always good. Its dirt cheap , light as a feather and quite effective in numbers.
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Post by cuddlefish on Oct 12, 2016 17:25:40 GMT
I've been fiddling about making replicas (well, caliber + mass + velocity clones) of real world weapons, and I've noticed that you tend to need really rather massive barrels to avoid mechanical difficulties. Anyone know good ways of minimizing the amount of barrel bulk needed?
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Post by captinjoehenry on Oct 12, 2016 17:30:38 GMT
Well the issue is in real life barrels are only that thick at the breach but in game the barrel is always that thick. Making the weapon silly big
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Post by morrigi on Oct 12, 2016 18:28:43 GMT
Yes, dev pls fix.
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Post by ross128 on Oct 12, 2016 18:38:42 GMT
It would be nice if we had a "barrel taper" parameter that we could use to make the barrel thick at one end and thin at the other.
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Post by redparadize on Oct 12, 2016 18:56:05 GMT
Well! that's a really light gun!! Rate of fire is low, but at that weight You can put many of them. I will try that on my light drones!
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Post by concretedonkey on Oct 12, 2016 19:01:47 GMT
You can put more power in the loader but it will increase the weight.
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Post by zuthal on Oct 12, 2016 22:19:01 GMT
It would be nice if we had a "barrel taper" parameter that we could use to make the barrel thick at one end and thin at the other. For barrel taper, I would ideally want the following parameters: Initial barrel thickness: The barrel thickness at the breech Final barrel thickness: The barrel thickness at the muzzle (must be ≤Initial barrel thickness) Barrel taper start: How far along the barrel the taper starts (must be ≤Barrel length) Barrel taper end: How far along the barrel the taper ends (must be ≤Barrel Length and ≥Barrel taper start) Between Barrel taper start and Barrel taper end, barrel thickness varies linearly between Initial barrel thickness and Final barrel thickness.
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Post by morrigi on Oct 13, 2016 7:15:56 GMT
I may have accidentally found a solution to the cross-sectional density problem mentioned on the first page, with a 30mm gun firing a 5mm, 4.6g submunition at 3km/s. The submunition is technically a custom-shaped steel radiation shield. Initial testing with the gun mounted on drones was promising, and made pretty sparks on impact.
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Post by beta on Oct 13, 2016 8:08:40 GMT
Has anyone had success in preventing conventional guns from getting destroyed by lasers extremely fast? They seem far more susceptible to laser damage than the other guns. I don't think lasers can even do damage to railguns for example.
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Post by cuddlefish on Oct 13, 2016 10:02:53 GMT
Has anyone had success in preventing conventional guns from getting destroyed by lasers extremely fast? They seem far more susceptible to laser damage than the other guns. I don't think lasers can even do damage to railguns for example. I suspect this comes down to two facts - one, the barrels are substantial, but not so much as accelerator rails often are. Much more importantly - there are explosive packages in the gun mechanism, so I suspect the catastrophic kill threshold is not enough heating to melt the gun, but 'only' enough heating to cook off a chambered round. Making your gun overly thick, and of something with a huge specific heat, might help.
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Post by beta on Oct 13, 2016 10:25:40 GMT
Yeah I figured it would be related to the propellant. Should try out a coilgun/railgun with an explosive payload to seem if they cookoff as easily ...
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Post by cuddlefish on Oct 13, 2016 12:42:42 GMT
Does anyone know good high Yield Strength insulators? Because I suspect that's the key for a las-resistant cannon. The closest I've found so far is good old UHMWPE plastic - a couple GPa of strength, and only 20 W/m K thermal conduction. You do get some heating issues, on account of its low melting point and its difficulty getting heat to the outer surfaces where it can radiate, but my 122mm cannon 'only' needs a minute per shot to get back to reference temperature, and has seemed to get a good thirty or fourty seconds of fire (25 gram long-rod in 2 gram plastic sabot, at 2.5 km/s, at ~8 shots per second) before having to stop for heating, which is often enough to do some hurt if the aim-point is good.
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