[gurps] [VEHICLE] of the week 714 – Gashidda-class 400-ton Surface Defense Boat

[Onno Meyer]

  This is a weekly posting with GURPS vehicles (and the like) to the 
GURPSnet mailing list. I grant the permission for all non-commercial 
redistribution of my work, but I would like to know if you put it on 
a website or the like. My site is down for rebuilding, but sooner or 
later the old stuff should reappear at   omeyer.gmxhome.de
  Onno Meyer, 2008-06-30

Gashidda-class 400-ton Surface Defense Boat v1.0 (GURPS Traveller TL5)
  Copyright 2008 by Onno Meyer

  During the Long Night, the planet Sonthert lost most technology. Some 
historical knowledge was retained, so a ship that might be called river 
monitor on other worlds is a SDB -- a Surface Defense Boat ...
  The Gashidda-class 400-ton SDB was designed to penetrate the armor of 
Imperial grav tanks and to resist their plasma guns. She falls short on 
both counts, but she can resist the fire from the current Imperial grav 
APC and damage one if she can bring her cannon to bear.
  The SDB has a sloped hull and turret to maximize armor effects, and a 
single 600mm breech-loading cannon. She fires 2-ton explosive shells or 
4-ton solid rounds, propelled by some 3 tons of powder. The funnels of 
the twin steam engines restrict the turret rotation to 330° unless the 
cannon is raised for anti-air fire. Her hull contains quarters and coal 
for two days. Usually the crew would live in barracks ashore.
  At travel speed, the engines burn 125 cf of coal per hour. A full load 
of coal, provisions and ammunition is $97,500.

Subassemblies: Body +9, full-rotation Turret +7. 
Powertrain: Two 1,200-kW screw propellers; two 1,250-kW triple-expansion 
  steam engines; 80,000-kWs lead-acid battery.
Fuel: 6,000-cf coal bunker.
Occ: 60 RCS, 50 bunks, 4 double-occupancy cabins, 2 luxury cabins.
Cargo: 1,600 cf.

Armor        F       RL       B       T       U
Body:     6/1,200   5/900   5/900   4/600   4/120
Turret:   6/1,200   5/900   4/600   4/600     -

Weaponry
600mm Cannon [Tur:F] (20 rounds) +0.

Equipment
  Body: Whistle; meteorology instruments; three sets of navigation 
instruments; fire direction center; operating room; two 10,000-lb. 
external cradles; 60-man environmental controls; 1,250 man-days of 
provisions. Turret: Universal mount; two signal lamps, limelight; 
three sets of navigation instruments. External: 4,000-sf top deck.

Statistics
Size: 300'x50'x30'   Payload: 300 tons     Lwt.: 4,800 tons
Volume: 200,000 cf   Maint.: 34-man-hrs.   Price: $50,597,000

HT: 8.   HPs: 120,000 Body, 30,000 Turret

wSpeed: 8   wAccel: 0.05   wDecel: 0.4(0.43)   wMR: 0.02   wSR: 7
Draft 16'. Flotation rating 5,130 tons.

Design Notes
  Body is 180,000 cf with mediocre lines, 60° F and 30° R/L/B slope, and 
heavy compartmentalization. Turret is 20,000 cf with 60° F and 30° R/L 
slope, and heavy compartmentalization. Structure is extra-heavy and 
expensive. Armor is expensive metal. Waterproofed. Mechanical controls. 
33,244 cf of empty space in body and 131 cf of empty space in turret. 
10 rounds of 600mm solid and 10 rounds of 600mm SAPLE are stored in the 
turret. Empty weight is 9,000,000 lbs.

Weapon       Weight  Volume Cost     Power WPS    VPS CPS       TL
600mm Cannon 160,000 3,200  $400,000   -   14,000 93  $2,800(1) 5
  Ammo type: (1) Solid, also fires SAPLE at 9,300 lbs. and $5,600.

Weapon       Ammo  Malf. Type Damage      SS Acc 1/2D  Max    RoF
600mm Cannon solid 16    cr.  6d*56       30 17  3,400 10,000 1/20
             SAPLE       cr.  6d*56(0.5)     17  3,400 10,000
                    plus exp. 6d*844[12d]

The vehicle uses the design rules from Vehicles [second edition, third 
printing, Dec 2004 errata], VXi and VXii (armor volume) with the text 
format from Vehicles Lite. The Traveller background affects the design 
decisions, not the technology.


Next Week: A primitive wheeled tank.