I played around with 100 tons. I couldn’t get jump 4 4G and 30 days power into a 100 ton hull, so I added drop tanks.
For your pleasure:
Breakit Class 140 ton Long Courier
Craft ID:
Breakit Class type SL Long Courier (Book 2)
Hull:
140 ton custom hull consisting of; 100 tons custom hull, 40 tons drop tanks
Streamlined
Crew:
Pilot=1, Engineer=1, Gunner=1
Engineering:
Jump=2/4, Manoeuvre=1/2, using Jump Drive B, Power Plant B, Manoeuvre Drive A
Avionics:
Bridge, Model 4 Computer
Hardpoints:
1, with 1 ton allocated to fire control
Armament:
Triple Turret with Beam Laser X3
Defences:
None
Craft:
None
Fuel:
42 tons in hull, 40 tons in drop tanks
Allowing for 1x Jump 2 and 1x Jump 1 and 30 days running @ 140 tons
Allowing for 1x Jump 4 and 1x Jump 1 and 22.8 days running @ 100 tons (dropping tanks)
Miscellaneous:
Small Storerooms=4, Cargo=2 tons
Cost:
MCr 89.7
Architects Fees MCr 0.897
Construction:
12 Week Singly
The Breakit Class Long Courier was designed to allow a single Jump 4 if there is a need to get a message or a single passenger that distance in the single week of jump, otherwise the ship works in the same role as a standard Type S with an additional jump 1 ability without the need to re-fuel.
From: xxxxxx@simplelists.com <xxxxxx@simplelists.com> On Behalf Of Thomas RUX
Sent: 23 December 2019 20:43
To: xxxxxx@simplelists.com
Subject: Re: [TML] CT LBB 2 1977 vs 1981 Drive Potential Tables
Hello Ewan,
Thank yo once again for this reply and all the others you have made in the past years.
> On December 23, 2019 at 3:15 AM Ewan <xxxxxx@quibell.org.uk> wrote:
>
> Hi Tom,
>
> The change in potential chart in the 1981 version is to allow a greater> diversity in ship building. The ‘81 version carries on in Starter Traveller and
>the Traveller book (both of which are subtly different Classic Traveller rule
> sets) so I would just stick to that and ignore the ‘77 version for book 2 ship
> building.
During the discussion in my Jump Drive Question someone indicated that the had CT LBB 2 1977 which is what promoted this post.
In CT LBB 2 1977 the jump drive used all of the required jump fuel regardless of the jump number. In CT LBB 5 HG 1979 the jump governor was added so that the CT LBB 2 1977 jump drives would consume fuel based on the actual jump number used rather than use the entire fuel load. The addition of the jump governor increased the CT LBB 2 jump drive cost by 300,000 and added 1 ton. CT LBB 5 HG 2e 1980 omitted the jump governor and CT LBB 2 released in 1981 moved the Power Plant to the last of the column without changing the cost and omitted the original fuel consumption.
As I've mentioned my latest effort, I want to thank everyone on the TML for their help on this, has finally resulted in matching most of the Standard Designs found in CT LBB 2 1977/1981 as well as the spreadsheet was using to error check them.
> And for retro fitting drive potentials a type d won’t go into a 100 ton hull. It’s
> not allowed. The only way you can get jump 1,2,3,4 and 6 in a 100 ton hull is
> by using drop tanks, and if you don’t use drop tanks then you can only get 2,
4 and 6.
Thank you catching my big fat finger mistake with the Type-D entry.
CT LBB 2 1977/1981 page 4 indicates that jump drives are rated at 1 to 6 and page 15 indicates that ship's performing less than their maximum jump capacity consume fuel at a lower level based on the jump number used.
Per the CT LBB 2 1977/1981 Drive Potential table a 100-ton hull using a 10-ton Type-A drive has a maximum jump capacity of 2 parsecs with a fuel load of 0.1 x J2 x 100 = 20 tons of fuel load. The J2 drive is also capable of making two 1 parsec jumps using the 20 tons of internal jump fuel. The scout/courier built as a standard or custom 100 hull that can make two J1 or one J2 on the 20 tons of fuel carried internally.
To install a Type-B of Type-C jump drive a 100-ton hull must be a custom design.
Installing a 15 ton Type-B jump drive gives the 100-ton hull per the Drive Table the maximum jump capacity is on 4 parsecs using 40 tons of fuel. The Type-B jump drive is also capable of J1, J2, and J3.
Installing a 20 ton Type-C jump drive gives the 100-ton hull per the Drive Table the maximum jump capacity is on 6 parsecs using 60 tons of fuel. The Type-B jump drive is also capable of J1, J2, J3, J4, and J5.
By stripping out 3 of the four staterooms, the hardpoint/turret/fire control system, the air/raft, reducing the power plant fuel from 30 tons to 15 tons, upgrading the computer, and increasing the jump fuel to 30 tons a 100-ton hull configured as a scout/courier would have 6 tons of unused space without drop tanks.
I do agree that a J4, J5, and J6 100-ton hull does require drop tanks with either no internal jump fuel tankage or a minimal fuel load of one J1.
Tom Rux
On December 23, 2019 at 3:15 AM Ewan <xxxxxx@quibell.org.uk> wrote:
Hi Tom,
The change in potential chart in the 1981 version is to allow a greater diversity in ship building. The ‘81 version carries on in Starter Traveller and the Traveller book (both of which are subtly different Classic Traveller rule sets) so I would just stick to that and ignore the ‘77 version for book 2 ship building.
And for retro fitting drive potentials a type d won’t go into a 100 ton hull. It’s not allowed. The only way you can get jump 1,2,3,4 and 6 in a 100 ton hull is by using drop tanks, and if you don’t use drop tanks then you can only get 2,4 and 6.
Best regards,
Ewan
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