Hi kaladorn,
On 08/17/2020 5:18 PM xxxxxx@gmail.com wrote:

Is it possible that they *were* designed using CT Striker Book 3 but:
a) They made a mistake in their designs and one of the two values are incorrect
b) They made a decision that MRLs should be lighter than the CT Striker Book 3 version

I see those both as possible, though I'd almost suspect a) is more likely given the errata-fest that is the MT legacy.
I agree that both options are possible. Without knowing the number of tubes/launch rails I have no real way of determining if anything is correct for the  listed MRLs.

CT Striker Book 3 Design Sequence 4 (DS 4) MRLs are constructed using the same characteristics as mortars with exceptions.

DS 4: A. Launcher: A single launcher consists of a number of launchers, plus fire control and carriage.

The TL-6 18-cm MRL has a total weight of 3.6 tons. CT Striker Design Sequence Tables Booklet p. 12 indicates that a TL-6 Indirect Fire Control System weighs 0.075 tonnes. Unfortunately, I'm not sure if the launcher has one Indirect Fire Control System or if each tube requires a separate Indirect Fire Control System. I'm leaning towards one per launcher.

A bore of 18-cm per Design Sequence Tables (DST) p. 6 has a weight of 7.5 tonnes. If this was a mortar the weight would be modified by 0.25 per DST p. 8 CPR Multiplier Table. According to DS 4 A. 2. Weight:each tube has a weight multiplier of 0.01. If I understand the rule I multiple the 18-cm weight of 7.5 x 0.75 tonnes per tube.

According to DS 2 D. Weight: 3 a weapon's  carriage weight is determined by using the CPR Carriage Table on DST p. 8. which multiples the weight of the weapon by 0.25.

If the Indirect Fire Control system is 0.075 tonnes the combined weight of the launch tubes and carriage is 3.6 - 0.075 = 3.525.

I am probably not understanding the rules which means I can not verify the numbers.

Tom Rux
On Mon, Aug 17, 2020 at 2:56 PM Thomas RUX < xxxxxx@comcast.net> wrote:
Hello all,

Per MT Consolidated Errata v 2.21 (02/23/2013) p. 34 recommends adding two tables of weapons. The first addition is a Multiple Rocket Launcher (MRL) Table which I believe is from MT 101 Vehicles Digest Group Publications 871-0795 copyright 1988 page 2.

I have no idea how many tubes each of the launchers has based on the table.

My first guess was that the MRLs were designed using CT Striker Book 3. The instructions/rules for constructing Design Sequence 4 MRLs can be found on pp. 17-18. MRLs are constructed using the same characteristics as mortars with exceptions.

On the MRL Table for MT the weight and the volume of the launcher are the same. Following the CT Striker Book 3 construction requirements Design Sequence 4 p. 17 A.3 Volume: The volume of a tube is its weight times 25. Apparently, the MT MRLs are not designed using CT Striker Book 3.

Does anyone have a suggestion of how to determine the number of tubes each of the MRLs has please?

Tom Rux

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