FFS designs
FFS: Gauss Weapons, Battery Error
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Date: Thu, 29 Jun 1995 14:55:07 +0300 (EET DST)
From: Lahtinen Antti Jussi <al76188@cs.tut.fi>
Subject: FFS: Gauss Weapons, Battery Error
FFS: Gauss Weapons, Gauss Battery Error, Magazine Capacity
After some fiddling with gauss weapon design rules, I decided
to use separate components for autoloader and HPG in stead of
a single "receiver" unit. This comes from the fact that a HPG
can be placed anywhere in gun, but autoloader must be placed at
the rear end of barrel. When separate components are used, the
minimum length of weapon drops quite dramatically.
I also noticed that gauss weapon batteries are incompatible
with the batteries listed in page 66. For example, TL-14 gauss
magazine battery is 14.4 times heavier than corresponding TL-14
storage battery.
Using current rules the battery size may vary greatly when tech
level and muzzle velocity is changed, but the maximum grip
magazine capacity stays constant. I measured several modern
handgun magazines, and made a simple volume-based formula that
can be used with CPR and Gauss handguns.
In the following design breakdown I have used separate autoloader
and HPG, and used normal storage battery.
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Design example: TL-14 Gauss Pistol
Projectile: 4x20mm Density 2 plastic dart
Component Mass (g) Volume (cm3) Price (Cr)
Projectile 0.5 0.25 0.01
Gun: Selective fire with 2500 m/s muzzle velocity
Component Mass (kg) Length (cm) Price (Cr)
Barrel 0.45 15 270
Autoloader 0.03 4 3
HPG 0.2 19 20
Hollow Grip 0.1 0 25
---------------
Gun Total 0.78 (kg) 19 (cm) 318 (Cr)
Autoloader is designed as Mass Driver autoloader. Weight
multipliers are:
Semi Automatic 30
Fully Automatic 50
Selective Fire 60
Very Rapid Fire 100
The length of loader mechanism is twice the length of ammo.
Autoloader is placed in the rear end of barrel, so the minimum
length of weapon is the length of barrel, plus the length of
autoloader.
HPG values are taken from table in page 66. HPG could be placed
anywhere, but in this design the HPG is over the barrel and
autoloader. The HPG is cylinder shaped, and its diameter is
2.53 cm.
Autoloader and HPG price is calculated as in page 103, using
price multiplier of 100.
75-round Grip Magazine
Component Mass (kg) Vol (cm3) Price (Cr)
Magazine 0.0237 37.7 0.237
Battery 0.0520 20.8 1.875
Ammo 0.0375 (75 rounds)
---------------
Magazine Total 0.1132 (kg) 58.5 (cm3) 2.112 (Cr)
0.0758 kg unloaded
Magazine capacity depends on the total volume of magazine.
The total volume of magazine is twice the volume of carried
ammo, plus the volume of battery. The volume of modern grip
magazine is around 60 cm3 in medium-frame pistols, and less
than 30 cm3 in hideout guns. (22.5 cm3 in one palm-sized
autoloader)
This pistol is designed to be medium sized (as Glock 17), so
the magazine volume can be up to 60 cm3.
Battery is taken from battery table in page 66. To allow all
fire rates up to 50 rounds/sec, a 0.36 second battery is
selected (price multiplier 9).
TL-14 battery volume in cm3 is calculated as:
(req. energy [j] x number of rounds)/(2.5 [MWh/m3] x 3600 sec).
Battery mass is 2.5 g/cm3, and price is Cr0.01/cm3.
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4mm Gauss Pistol (Gp-25)
Manufactured in Vyborg/Capella/Solomani Rim, the SAKO Gp-25 is high-power
selective-fire gauss pistol used as sidearm by Vyborg police and military
forces. The Gp-25 fires 4mm gauss darts at 2500 meters per second.
To minimize autofire recoil, Gp-25 can fire 3-round autobursts in stead of
normal fully automatic fire.
Note: This weapon have the same dimensions as TL-8 Glock 17 autopistol. The
major difference is that Gp-25 has barrel at the same place where Glock 17
has the recoil spring guide.
TL-14
Ammo: 4x20mm/25 (density 2 plastic dart)
Muzzle Energy: 1562.5 joules (required energy 2500 joules)
Weapon Length: 19 cm
Weapon Weight: 0.78 kg empty, with no magazine.
0.893 kg with full 75-round magazine
Weapon Prize: Cr318
Magaz. Weight: 75-round magazine: 0.113 kg loaded, 0.076 kg empty
Magaz. Price: Cr3
Ammo Prize: Cr0.01 (Dart), Cr0.02 (EDD, Tranq), Cr0.03 (HEAP)
Ammo Weight: 0.5 grams per round
Features: Optional TL-14 laser sight
Round ROF Dam Pen Bulk Magaz Recoil S Range
4x20mm Dart SA/3 3 1-Nil 1 75 4/6 20 (20)
4x20mm EDD SA/3 4 3-Nil 1 75 4/6 20
4x20mm HEAP SA/3 4 2-2-2 1 75 4/6 15
4x20mm Tranq SA/3 -1* Nil 1 75 4/6 12
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--
Antti Lahtinen : Justice is Only a Wish of a Weak
al76188@cs.tut.fi :