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[MedievalSteve]

No, there is no minimum for small craft regardless of weeks of fuel.

REVISED FUEL OPERATION TIMES
The small craft detailed in the Traveller Core Rulebook
and High Guard use the ship construction rule of a
minimum of one ton needed for power plants and this is
enough to run a spacecraft for the standard four weeks
of operation. However, it makes sense for small craft to
be able to use less than a ton of fuel for their tiny power
plants and this is what the Small Craft Catalogue does
to alter the operational characteristics of each craft.

As an example, the first small craft in the book is the Hopper, 5 dTon vessel with 8 weeks of operational fuel taking 0.1 dTon of volume.
For High Guard small craft that you don't want to change the fuel tonnage on, they recommend either converting the excess fuel space to cargo, or increasing the weeks of operation, which would give the Light Fighter 40 weeks of operation.

And we get back to the argument that if you are building a tool for the game system, it should use the all the rules of the system, not just Core and HG. At least make it clear that you are not using all the proper rules but only those from HG Update 2022.

My man, again - I am JUST ONE GUY, and this is an EARLY BETA RELEASE for testing. I built it SPECIFICALLY FOR High Guard rules as it says in the banner of the app:



AND on the front page of the app when you open it.


I love that the spreadsheets that are out there contain all of the sources, that they are awesomely accurate to every detail - here's two little points though:
1. They have had a MASSIVE head start on me - I've only been playing for Traveller for a year or two.

2. I didn't intend to make an Uber App that dealt with every possible eventuality of every rule in every book - I wanted to make a User Friendly App to help people like me make ships based on the High Guard book.

I fully intend to extend the scope of this app. Eventually. AFTER I make it work as intended.

Mongoose kindly put a link up on their website for me, not as an 'endorsment' or to make me 'official' in any way, but as a shout-out to a fan using the Fair-Use policy to make something that some people might find cool.


"Using all the proper rules" is also an INCREDIBLY SUBJECTIVE term. There are a lot of supplements, and a lot of editions to draw from.

The "Proper Rules" for my game at home? I use the Core Book, and the High Guard book, Aliens 1, and the TravellerWiki, and TravellerMaps.

I have a job, and a family, and my own games to run. I'm making an app for fun, and to share with the community, some of whom may find it useful. Now do you wanna keep ragging on me, or do you have something useful to say?

 

[MedievalSteve]

I have recently started with Mongoose after using dad's CT LBBs I took out of the attic. This is a great tool and is very helpful. Thank you.

Thank you!

 

[Sigtrygg]

My man, again - I am JUST ONE GUY, and this is an EARLY BETA RELEASE for testing. I built it SPECIFICALLY FOR High Guard rules as it says in the banner of the app:
View attachment 6388


AND on the front page of the app when you open it.
View attachment 6390

I love that the spreadsheets that are out there contain all of the sources, that they are awesomely accurate to every detail - here's two little points though:
1. They have had a MASSIVE head start on me - I've only been playing for Traveller for a year or two.

2. I didn't intend to make an Uber App that dealt with every possible eventuality of every rule in every book - I wanted to make a User Friendly App to help people like me make ships based on the High Guard book.

I fully intend to extend the scope of this app. Eventually. AFTER I make it work as intended.

Mongoose kindly put a link up on their website for me, not as an 'endorsment' or to make me 'official' in any way, but as a shout-out to a fan using the Fair-Use policy to make something that some people might find cool.
View attachment 6391

"Using all the proper rules" is also an INCREDIBLY SUBJECTIVE term. There are a lot of supplements, and a lot of editions to draw from.

The "Proper Rules" for my game at home? I use the Core Book, and the High Guard book, Aliens 1, and the TravellerWiki, and TravellerMaps.

I have a job, and a family, and my own games to run. I'm making an app for fun, and to share with the community, some of whom may find it useful. Now do you wanna keep ragging on me, or do you have something useful to say?

I fully support you and would like to say a very public thank you for doing this.

 

[AnotherDilbert]

Hmm. yes - I would like to hear from an official source on it for sure, @MongooseMatt?

The way I've read it is:

For a 500-ton ship, the 'standard bridge' is 2.5 MCr and 20 tons.
If I want to make it detachable, first I need to respect the 'minimum size', so it gets increased to 30 tons. But the cost stays the same as it is 'size of ship' not 'size of bridge' that matters at that step.
Then I add 50% to cost and 20% to volume - so it becomes 3.75 MCr and 36 tons.

OPTION A: If I'd made a 500-ton ship, with a 'smaller bridge' which is detachable, applying the "one size smaller" rule solely to the Bridge Size table:

For a 500-ton ship, the 'smaller bridge' is 1.25 MCr and 10 tons.
If I want to make it detachable, first I need to respect the 'minimum size', so it gets increased to 30 tons. But the cost stays the same as it is 'size of ship' not 'size of bridge' that matters at that step.
Then I add 50% to cost and 20% to volume - so it becomes 1.875 MCr and 36 tons, with a negative DM applied to the user.

OPTION B: If we look at the "one size smaller" rule as applying to BOTH the Bridge Size table and the Detachable Bridge Minimum Size Table simultaneously:

For a 500-ton ship, the 'smaller bridge' is 1.25 MCr and 10 tons.
If I want to make it detachable, first I need to respect the 'minimum size', so it gets increased to 15 tons. But the cost stays the same as it is 'size of ship' not 'size of bridge' that matters at that step.
Then I add 50% to cost and 20% to volume - so it becomes 1.875 MCr and 18 tons, with a negative DM applied to the user.

I think that I probably implemented Option A originally, but think it probably should be Option B.

I think this is more in keeping with the wording of the current rulebook, which makes Detachable Bridges an optional add-on instead of a replacement type.

I BELIEVE you are over-complicating it...

Just use the base bridge cost from HG,p19 and the size table from HG,p51, so:

General rule:

The cost of any bridge is MCr0.5 per 100 tons (or part of) of the ship it is installed within.

Specific rule for Detachable bridge (overriding the bridge size table from HG,p19):

Making a bridge detachable adds +50% to its cost and consumes +20% more tonnage.

It MAY PERHAPS be that Detachable bridge for a 500 Dt ship is 30 Dt, and the 20% extra is for some sort of docking space?



The only example I can find is the Rorix Command Vessel from the Drinaxian Companion (using HG'2016):

Perhaps there is a version updated for HG'2022?


I see that Arkathan disagrees with me, he just ignores the Detachable Bridge Size table, see discussion here:
https://forum.mongoosepublishing.com/threads/excel-ship-designer-v2025-10-22.123101/post-984245




I GUESS it should be something like this:

 

[Arkathan]

I see that Arkathan disagrees with me, he just ignores the Detachable Bridge Size table, see discussion here:
https://forum.mongoosepublishing.com/threads/excel-ship-designer-v2025-10-22.123101/post-984245
View attachment 6395

Since the chart was carried forward from 2016, and the text was new, I went with the new part

 

[MasterGwydion]

Since the chart was carried forward from 2016, and the text was new, I went with the new part

Mongoose copying and pasting obsolete stuff that doesn't match the new written text?