Hello Ethan and  Postmark,

If I've followed the directions in Design Sequence (DS) 2 pp. 13-17 the specifications for a mortar with an 18-cm bore would be:

CT Striker Book 3 p. 13 DS 2. D. Weight: The weight of a weapon system is equal to the weight of the weapon itself, plus its fire control, plus its carriage (if towed), plus its gun-shield (if any).

Page 13 DS 2: D. 1. Weapon: The weight of a high velocity gun is listed on the CPR Gun Table, Design Sequence Tables (DST) booklet p.6, for each bore size. For other types, multiply the listed weight by the multiply the listed multiplier given on the CPR Multiplier Table, DST p. 8.

The CPR Gun Table, DST p.6, lists an 18-cm high velocity gun bore as being 7.5 tonnes.

The CPR Multiplier Table shows that a mortar has a 0.25 multiplier of 0.25 for weight and a 0.10 multiplier for price.

The weight of an 18-cm mortar is 7.5 x 0.25 = 1.875 tonnes

Page 13 DS 2. D. Weight: 2. Fire Control: The weights of various fire control systems are given in the fire control section.

A TL-6 Indirect Fire Control System per DST p. 12 weighs 0.075 tonnes.

Page 13 DS 2. D. Weight: 3. Carriage: A towed weapon requires a carriage for support while moving and firing. To determine carriage weight, multiply the weapon's weight by the number given on the CPR Carriage Table, DST p. 8. A mortar's carriage multipliers are weight = 0.25 and price = 0.10.

Weapon weight = 1.875
Carriage weight = 1.875 x 0.25 = 0.46875

Total weight of an 18-cm mortar is 1.875 + 0.075 + 0.46875 = 2.41875 tonnes.

CT Striker Book 3 DS 4: MRLs pp. 17-18
Multiple rocket launchers (MRLs) are available at tech level 6+; they are constructed using the CPR gun design system, using the same characteristics as mortars with the following exceptions.

Page 17 DS 4. A. Launcher: A single launcher consists of a number of launch tubes, plus fire control and carriage.

Page 17 DS 4. A. 1. Crew: A launcher's crew is the normal crew for that size weapon, times number of tubes in the launcher, divided by 10 (but never less than 2). All crew except the gunner are required for reloading; if the weapon is to be used only once, the rest of the crew can be dispensed with.

Page 17 DS 4. A. 2. Weight; Each tube has a weight multiplier of 0.01.

I'm not sure of the instructions in A. 2.

Interpretation 1:
18-cm bore weight of 7.5 x 0.01 = 0.75 tonnes.
Carriage weight = 0.75 x 0.25 = 0.1875.

Total TL-6 18-cm Single Tube MRL = Indirect FCS 0.075 + 0.75 tube weight + 0.1875 carriage weight = 1.0125 tonnes.

Interpretation 2:
The weight of an 18-cm mortar is 7.5 x 0.25 x 0.01 = 0.1875 tonnes.
Carriage weight = 0.1875 x 0.25 = 0.046875 tonnes.
TL-6 Indirect FCS weight = 0.075

Total TL-6 18-cm Single Tube MRL = Indirect FCS 0.075 + 0.1875 tube weight + 0.046875 carriage weight = 0.309375 tonnes.

According to the MRL table a single tube 18-cm MRL-6 weighs 3.6 tonnes.

Tom Rux

> On 08/18/2020 4:49 AM Postmark - postmark.design at btinternet.com (via tml list) <xxxxxx@simplelists.com> wrote:
>
>
> On 18 Aug 2020, at 04:40, Ethan McKinney <xxxxxx@gmail.com> wrote:
> >
> > Since those MRLS have an ROF of 1, doesn't that mean that they are single-tube launchers? I thought that ROF=# of tubes for MRLs.
>
> Agreed - the text says “MRL-x tube”, where x is the Tech level.
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