FFS designs
Design & Notes - 700 Mj Laser turret
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Date: Wed, 25 Oct 1995 14:49:23 -1600
From: Michael Bailey <pd82495@wapol.gov.au>
Subject: Design & Notes - 700 Mj Laser turret
A quick laser design for a 700 Mj Laser barbette (I chose 700 Mj mainly
because of the optional house rule limiting laser discharge energy to TL x
50...700 Mj is the largest TL 14 laser that can be built. I've also
included the design notes, for anyone new to FF&S (they don't take up too
much space).
TL-14 700Mj Laser Barbette (X-ray, trainable, grav-focused)
1/ Tech Level: 14
2/ Gravitic focusing present
3/ Focal Array: 4.5m diameter
4/ Discharge energy = 700 Mj
Input energy = 700 / 0.2 (for grav-focussed lasers)
Heavy focal array (shipborne laser)
X-ray laser (ditto, no requirement for atmospheric use)
Trainable (turret / barbette mount)
SA = 15.91 m^2
V = 11.13 m^3
M = 11.13 m^3
P = MCr 2.227
5/ Performance
FA diameter = 4.5m = 45dm
F (focal value) = (5D)^2 = 50625
R (maximum range) = F/10 * Range factor
= 5.062 x 10^9 km (a bloody long way)
6/ Beam Pointer: 300,000km (10 hexes) range
V = 6m^3
M = 6t
P = MCr0.6
Weapon short range = 10 hexes
7/ Damage: DV = 2.5*(I^0.5)
I = DE(1/R^2), where R = laser actual range/base range
Since range is greater than the laser's base range for all ranges, I = DE
(if R < 1 then R = 1)
STF, DV = 2.5*(DE^0.5)
= 66
Penetration rating: IPR = (I^0.5)*0.8
i.e. IPR = (DE^0.5)*0.8
= 21
STF, PR = 1/21
8/ Power source and ROF
TL-14 Homopolar Generator, 3500 Mj capacity
V = 140 m^3
M = 280 t
P = MCr 1.4
Power requirements: ROF 10 = 19.44 MW
ROF 50 = 97.22 MW
ROF 100 = 194.4 MW
Summary:
TL-14 700 Mj Laser barbette (X-ray, grav focused, trainable)
Volume = 157.13 m^3
Surface area = 15,91 m^2
Mass = 297.13 t
Price = MCr 4.227
Power = 19.44 MW (97.22 MW ROF 50, 194.4 MW ROF 100)
Damage 10:1/21-66 20:1/21-66 40:1/21-66 80:1/21-66
NB: This weapon does NOT fit into a standard barbette mount.
Michael Bailey (pd82495@wapol.gov.au)